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Feasibility

DA vs CDC: which path suits your project?

The core distinction is this: a Complying Development Certificate (CDC) is a fast-tracked, rules-based approval for standard, low-impact projects, while a Development Application (DA) is a slower, merit-based assessment that buys you more design flexibility and discretion from council planners. Choosing between them is primarily a feasibility decision about how tightly your design can fit the code, how much risk you can tolerate, and how much control you need over the outcome.

1. What DA and CDC are

A Development Application in NSW is a formal request for development consent under the Environmental Planning and Assessment Act 1979, assessed by your local council against State Environmental Planning Policies (SEPPs), the Local Environmental Plan (LEP) and relevant Development Control Plans (DCPs). It is merit-based: planners weigh impacts (bulk and scale, overshadowing, character, traffic, heritage, amenity) and can exercise discretion, request changes, or refuse the application outright.

A Complying Development Certificate is a combined planning and construction approval for straightforward development that meets pre-set numerical standards in State codes, most commonly the Housing and other Codes SEPP. If the proposal and site meet every listed control (height, setbacks, private open space, landscaping, car parking, etc.), an accredited certifier or council must issue the CDC within statutory time frames; if it fails any control, the application simply cannot proceed as complying development.

Under current NSW settings, all DA and CDC applications must be lodged through the NSW Planning Portal, with defined document sets (plans, reports, certificates) and online payment of fees. This means both pathways now share a digitised process, but they diverge sharply in how they treat discretion, public participation, and time frames.

2. Timeframes: speed vs certainty

CDC approvals are typically issued within 10–20 business days for standard projects, and as little as 10 days under the NSW Housing Pattern Book complying development pathway, provided the proposal is fully compliant and the documentation is complete. This accelerated turn-around is a deliberate policy choice: complying development is meant to clear low-impact, standardised projects quickly, freeing councils from routine assessments.

DA assessments routinely take months rather than weeks, with published ranges of roughly 3–12 months depending on council resourcing, complexity, neighbour objections and the need for redesign. The process includes notification periods, possible referrals to design review panels or heritage advisers, and iterative negotiations over changes, all of which extend the timeline and can introduce significant uncertainty.

In practice, the time advantage of a CDC evaporates if your design only marginally fits the codes and needs repeated redesign to achieve strict compliance. Conversely, although DAs are slower on paper, a well-prepared DA that aligns with council controls and engages stakeholders early can avoid major delays, particularly in councils with established processes for pre-lodgement meetings and design review.

3. Risk profile: approval risk vs design risk

Risk under a CDC pathway is primarily binary: if your project and site satisfy every relevant standard, approval must be granted; if not, it cannot be approved as complying development at all. The approval risk is lower once compliance is proven, but the design risk is higher upfront because even minor deviations (for example, a setback short by a few hundred millimetres) can force a complete change of pathway.

By contrast, DA outcomes sit on a spectrum: council planners can approve, approve with conditions, or refuse, and they may accept modest variations from numeric standards where the overall impact is acceptable. This introduces higher approval risk in the sense that outcomes are less predictable, but lower design risk in that you can argue for performance-based solutions rather than strict rule adherence.

Neighbour and community risk also diverge. CDCs generally do not require formal neighbour notification or a public exhibition period, which limits third-party input and objection risk but can create political and reputational sensitivities where projects are perceived as “bypassing council”. DAs require public notification and allow submissions; objections can delay assessment, trigger additional conditions, or even lead to refusal, particularly in politically sensitive or character-focused neighbourhoods.

For complex or contentious projects, some practitioners treat the DA process as a managed risk environment: you accept the possibility of objection and delay in exchange for the chance to negotiate outcomes, adjust the design, and demonstrate merit. For standard low-impact work in benign contexts, a CDC often represents a lower-risk pathway provided feasibility work confirms compliance at the outset.

4. Design flexibility and project typology

CDC standards are tight and prescriptive. They specify maximum heights, setbacks, site coverage, private open space, car parks, and sometimes materiality or façade treatments, with little scope to deviate without leaving the complying development framework. For straightforward detached dwellings, secondary dwellings, simple extensions, and some duplex or small commercial projects, these standards can be met with relatively conventional designs.

DA assessment, being merit-based, allows more freedom to pursue non-standard forms, complex site responses (steep slopes, irregular lots), and context-specific design moves that might not sit neatly within CDC tables. Heritage-listed properties, conservation areas, mixed-use developments, and ambitious architectural projects almost always require DA because the planning system expects case-by-case evaluation of their impacts and contributions.

Recent NSW policy proposals around “CDC variations” aim to allow minor deviations from strict complying development standards while retaining a fast-track character, but these mechanisms are still emerging and details are subject to change. Until they are fully implemented, the working assumption should be that CDCs are effectively zero-tolerance on standards, and anything non-standard belongs in a DA.

For production-heavy or design-intensive projects (for example, high-concept dwellings or small studios where spatial and aesthetic choices are central), the DA pathway typically aligns better with the need to negotiate unusual solutions with planners. For more utilitarian builds where speed and cost control dominate over formal innovation, CDC is closer to a code-compliant checklist that trades flexibility for predictability.

5. Practical feasibility: how to decide DA vs CDC

NSW practice increasingly treats DA vs CDC as a feasibility question answered early, before detailed design fees are committed. Typical feasibility steps include: checking zoning and overlays, reviewing the applicable SEPP codes and LEP/DCP controls, mapping site constraints (slope, flooding, heritage, easements), and sketching test layouts against key CDC standards such as setbacks, private open space, and solar access.

Pre-lodgement meetings with council planners are recommended for both pathways but are especially useful if you anticipate needing a DA; they allow you to test appetite for variations and to identify likely conditions or concerns before committing to a design. For CDC, feasibility often involves liaison with an accredited certifier early on, to confirm the site and concept are eligible under the chosen code.

Documentation demands are similar at a baseline level: both pathways require site plans, floor plans, elevations, sections, BASIX certificates for residential projects, and design verification statements confirming code compliance. DA typically adds impact assessments (Statement of Environmental Effects, traffic reports, heritage reports, view or overshadowing studies), whereas CDC focuses on evidence that each relevant numeric control is satisfied.

Costs are highly project-specific, but available industry guidance suggests that CDC approvals have lower and more predictable statutory costs due to shorter time frames and simpler documentation, whereas DAs tend to incur higher council fees and professional costs over longer assessment periods. This distinction is material in feasibility studies, but should be weighed against the potential for expensive redesign if you attempt a marginal CDC and later discover it does not comply.

6. Summary table: key differentiators

Dimension	Complying Development Certificate (CDC)	Development Application (DA)
Legal basis	Fast-tracked approval under SEPP complying development codes; issued by council or accredited certifier if standards met.	Merit-based council consent under Environmental Planning and Assessment Act, LEP and DCP.
Timeframe	Typically 10–20 business days; some pattern-book pathways around 10 days.	Often 3–12 months depending on council, complexity and objections.
Assessment style	Tick-box compliance with predefined numeric standards; no discretion once rules are set.	Discretionary assessment of impacts and merit; capacity for conditions and negotiated changes.
Design flexibility	Low; little tolerance for deviation from prescribed controls.	Higher; non-standard designs can be assessed case-by-case.
Neighbour input	Generally no formal notification or public exhibition.	Mandatory notification and opportunity for submissions.
Typical projects	Standard houses, secondary dwellings, simple extensions, some duplex and small commercial where site and design are straightforward.	Complex, heritage-affected, mixed-use, or contextually sensitive developments; ambitious or unusual architecture.
Primary risks	High design risk if initial feasibility is poor; ineligible projects cannot proceed as CDC at all.	Higher approval and time risk from objections and planner discretion, but better scope to negotiate and adapt.
Cost tendencies	Lower and more predictable statutory and consultant costs due to speed and standardisation.	Higher and more variable costs from extended assessment, additional reports and potential redesign.

7. Critical limitations and uncertainties

Most publicly available commentary on DA vs CDC in NSW comes from consultants, designers, builders or certifiers with commercial interests in particular pathways, which introduces bias in favour of whichever process they specialise in or can deliver fastest. These sources rarely provide systematic empirical data on approval times, refusal rates or cost differentials, and instead rely on indicative ranges and anecdotal experience, which limits the statistical robustness of their claims.

The regulatory framework is also volatile. NSW has recently proposed new “complying development variations” pathways to allow minor deviations from CDC standards, but these are subject to ongoing consultation and may change materially before full implementation. Relying on early descriptions of such mechanisms for strategic decision-making is therefore risky; project teams should treat them as provisional until the final instruments are gazetted.

Finally, while rules-based CDC pathways appear more objective, their strictness means small errors in interpretation or documentation can have disproportionate consequences, and guidance on how certifiers will treat borderline cases is limited. DA processes, despite their flexibility, suffer from inconsistency between councils and over time, and there is little publicly accessible, peer-reviewed research quantifying this variation across NSW, which leaves practitioners reliant on local experience rather than generalisable evidence.

References

Planning guides

What R2 zoning means for your site

R2 Low Density Residential is the most common residential zone in Sydney, and the one most often misread. The zone label tells you which uses are on the menu; it does not tell you what you can build. The numbers that decide that (minimum lot size, height, floor space ratio, setbacks, landscaped area) sit in separate clauses of your Local Environmental Plan, in the Development Control Plan behind it, and increasingly in a State policy that overrides both. Two sites in the same R2 zone, a few streets apart, can carry very different development.

1. Where the R2 rules come from

R2 is not a council invention. It is one of the standard residential zones in the Standard Instrument (Local Environmental Plans) Order 2006, the template every council in NSW must use when it writes its LEP. That is why the zone name, the zone objectives and the broad shape of the land use table look familiar from one council to the next: they are drawn from a single State template rather than written locally.

The standard objectives of the R2 zone are to provide for the housing needs of the community within a low density residential environment, and to enable other land uses that provide facilities or services to meet the day to day needs of residents. Those objectives matter more than they appear. When a proposal sits at the edge of a control, an assessing planner will test it against the objectives of the zone, and a scheme that plainly reads as medium density in a low density street will struggle regardless of how the numbers stack up.

Beneath the objectives sits the land use table, which sorts every use into three buckets: permitted without consent, permitted with consent, and prohibited. Councils adapt the table within limits, so R2 in Ryde is not identical to R2 in Sutherland Shire. The zone gets you to the right chapter; only the specific LEP tells you the rules.

2. What you can build in R2

The core of the R2 land use table is a dwelling house, a secondary dwelling (a granny flat), a dual occupancy and semi-detached dwellings, all with development consent. Around that core, most councils also permit a longer list with consent: boarding houses, child care centres, community facilities, educational establishments, group homes, health consulting rooms, home businesses and home industries, neighbourhood shops, respite day care centres and, in some LEPs, shop top housing. The exact list is set by your council’s land use table, and the differences between councils are real.

Two State reforms have widened that core materially. From 1 July 2024, dual occupancies and semi-detached dwellings became permissible with consent across R2 zones throughout NSW, removing the patchwork where some councils allowed duplexes and neighbouring councils did not. From 28 February 2025, the second stage of the Low and Mid-Rise Housing Policy went further, permitting terraces, manor houses and multi dwelling housing, and in places low-rise residential flat buildings, on R2 land within roughly 800 metres walking distance of a list of nominated town centres and transport hubs.

That second reform is geographically targeted rather than universal. Whether your R2 site sits inside or outside one of those walking catchments is often the single largest determinant of what it is worth, and it is not something the zone colour on a map will tell you.

3. The controls that decide yield

Permissibility is the beginning of the analysis, not the end. In practice the binding constraints are numerical, and they live outside the land use table:

Minimum lot size. Clause 4.1 of the LEP sets the minimum lot size for subdivision, commonly 450 square metres in R2 but ranging widely by council and by locality. It is the control that most often decides whether a dual occupancy can be subdivided into two saleable lots, which is usually where the margin sits.

Height of buildings. Mapped under clause 4.3, typically 8.5 or 9.5 metres in R2. The difference between those two figures decides whether a genuine two-storey scheme with a pitched roof works on a sloping site.

Floor space ratio. Mapped under clause 4.4 where it applies. Not every R2 area has a mapped FSR, and where it does not, bulk is governed by height, setbacks and landscaped area instead.

The DCP layer. Setbacks, landscaped area, deep soil, private open space, solar access, driveway widths, parking and tree retention are usually in the Development Control Plan rather than the LEP. A DCP is not law in the same way an LEP is, but a scheme that ignores it will attract conditions, objections and delay.

Under the Stage 2 reforms, dual occupancy on qualifying R2 land is subject to non-discretionary development standards, including a minimum lot size of 450 square metres, a minimum lot width of 12 metres, a maximum floor space ratio of 0.65:1 and a maximum height of 9.5 metres, with subdivision permitted down to 225 square metres per lot at a minimum 6 metre width. These State standards override the equivalent LEP and DCP provisions, except where the local control is more generous.

4. What R2 prohibits, and where projects come unstuck

Outside the mapped Stage 2 catchments, residential flat buildings remain prohibited in R2, as do most commercial, retail beyond a neighbourhood shop, and industrial uses. Prohibition is absolute: there is no variation clause that makes a prohibited use permissible, and clause 4.6 cannot be used to overcome it. This is a common and expensive misunderstanding. Clause 4.6 varies a development standard such as height or floor space ratio, not the permissibility of a use.

The more frequent problem, though, is not the zone at all. It is the overlays sitting on top of it. Heritage conservation areas, bushfire prone land, flood planning areas, acid sulfate soils, biodiversity values land, and easements or rights of carriageway do not change what the zone permits, but any one of them can stop a scheme or reshape it entirely. A site can be perfectly zoned for a duplex and still be undevelopable in the form the buyer had in mind. Checking the zone without checking the overlays is the single most common failure we see in pre-purchase due diligence.

5. Practical implications for a feasibility

A defensible R2 feasibility works through four questions in order. Is the use permissible under this council’s land use table, and does the Housing SEPP widen that? Does the site meet the numeric thresholds for the form you want, particularly minimum lot size and width? What do the overlays and site constraints do to the developable envelope once setbacks, landscaped area and deep soil are applied? And finally, what is this council approving on comparable sites, which is a question the controls alone will not answer.

Yield should be derived from that sequence, not assumed from the zone. The gap between a theoretical yield calculated off site area and a realistic yield after controls and constraints are applied is routinely one dwelling, and one dwelling is usually the difference between a project that works and one that does not.

6. Summary table: reading an R2 site

Question	Where the answer sits	Why it matters
Is the use permitted?	LEP land use table for Zone R2, as widened by the Housing SEPP	Prohibition cannot be varied; clause 4.6 does not apply to permissibility.
Can it be subdivided?	LEP clause 4.1 minimum lot size; Housing SEPP standards where they apply	Usually decides whether two saleable lots are achievable.
How tall?	LEP clause 4.3 and the height of buildings map	8.5 versus 9.5 metres often decides two storeys on a slope.
How much floor area?	LEP clause 4.4 where FSR is mapped; otherwise height and setbacks	Not all R2 land has a mapped FSR.
What shape can it take?	Council DCP: setbacks, landscaped area, deep soil, private open space, parking	Drives the real envelope more than most buyers expect.
Is it in a reform catchment?	Low and Mid-Rise Housing Policy mapping, by walking distance to nominated centres	Can be the difference between a duplex and townhouses.
What else is on the land?	Heritage, bushfire, flood, biodiversity and acid sulfate mapping; title and easements	Overlays stop more R2 projects than the zone itself.

7. Critical limitations and uncertainties

Much of the accessible commentary on R2 zoning and the low and mid-rise reforms is published by designers, builders, certifiers and agents with a commercial interest in a particular outcome, and it tends to describe the most favourable reading of the rules rather than the assessed reality. Very little of it is accompanied by data on approval rates, refusals or the conditions councils are imposing under the new standards.

The policy settings are also still moving. The Low and Mid-Rise Housing Policy has commenced in stages, its mapped catchments and non-discretionary standards have been refined since first exhibition, and councils have applied them inconsistently while their own instruments catch up. Where a State standard and a local control conflict, the resolution is not always obvious on the face of the documents, and practice is still forming.

Finally, none of this substitutes for the instruments themselves. The only reliable answer for a specific property comes from that council’s LEP and DCP as currently in force, the mapping on the NSW Planning Portal, the title and any restrictions on it, and where the question is finely balanced, a pre-lodgement discussion with the council. Zone labels are a starting point for a conversation, not a development yield.

References

Development tips

5 things to check before buying a development site

Most development sites that fail do so because of information that was available before purchase. The zoning looked right, the lot looked big enough, and the numbers worked on a spreadsheet. Then, after exchange, a flood notation, an easement, a heritage listing or a sewer main running under the only buildable part of the lot changes the answer. None of those things are hidden. They sit in documents a buyer can read, or order, in the few days before contracts are exchanged. Here are the five checks every buyer should run in that window, and what each one can tell you.

1. The planning controls: what the site can legally carry

Start with the rules that decide what can be built, not with the listing agent’s description of what “could” be built. The zone in the council’s Local Environmental Plan (LEP) tells you which uses are permissible. The numbers that decide yield sit in separate clauses: minimum lot size for subdivision (clause 4.1), height of buildings (clause 4.3) and floor space ratio (clause 4.4), where one is mapped. Setbacks, landscaped area, deep soil, parking and private open space sit in the council’s Development Control Plan (DCP).

On top of the local instruments, State policy now does a lot of the work. The Housing SEPP has made dual occupancies permissible with consent across R2 zones, and its low and mid-rise provisions allow terraces, townhouses and, in places, small apartment buildings within walking distance of nominated town centres and stations. Whether a site sits inside one of those catchments can matter more than anything in the LEP.

The vendor must attach a planning certificate under section 10.7(2) of the Environmental Planning and Assessment Act to the contract for sale. It lists the zone, the instruments that apply, whether complying development can be carried out on the land, and hazards such as flooding and bushfire. It is worth ordering the fuller section 10.7(5) version as well, which adds advice the council holds on matters such as contamination or local policies. Read the certificate line by line; it is the single most useful document in the contract.

2. Hazards and overlays: what can stop or reshape a scheme

Overlays do not change what the zone permits, but any one of them can stop a scheme or reshape it entirely. Three do most of the damage.

Heritage. A heritage item, or a site inside a heritage conservation area, usually rules out complying development for new dwellings. The Low Rise Housing Diversity Code, the fast-track route for many duplexes and terraces, cannot be used on heritage items or in heritage conservation areas. That leaves a development application (DA), assessed on merit against the character of the area, with longer timeframes and less certainty about the form a council will accept.

Flooding. Since the State’s flood-prone land package took effect in July 2021, every LEP carries a standard flood clause, and flood-related controls are noted on the planning certificate. Land in the flood planning area usually needs habitable floors raised above the flood planning level, which changes building height, access, cost and sometimes the number of dwellings a site can carry. Some flood-affected lots are also excluded from complying development.

Bushfire. On bush fire prone land, development must meet Planning for Bush Fire Protection 2019, and the site’s bushfire attack level (BAL) drives construction standards and cost. Complying development is only available at the lower levels, BAL-LOW to BAL-29; sites rated BAL-40 or Flame Zone have to go through a DA.

Also look for acid sulfate soils, biodiversity mapping, land reserved for a public purpose such as a road widening, and any history that suggests contamination. Most of these appear on the planning certificate and the NSW Planning Portal’s spatial viewer.

3. The title: what others already have a right to

The title search attached to the contract shows who owns the land and what is registered against it. What matters for development is often in the fine print: easements for drainage or services, rights of carriageway, restrictions on the use of land and positive covenants. Many of these are created by a section 88B instrument registered with the deposited plan, and the instrument is not always attached to the contract. Order it. A restriction limiting the lot to one dwelling, or a drainage easement across the middle of the site, can end a feasibility on its own.

Check the sewer service diagram too, which is attached to the contract. Sydney Water requires approval before anyone builds over or next to its pipes, and a main running through the lot can push a building away from where the feasibility assumed it would sit, or add the cost of an engineering solution. A sewer or stormwater asset in the wrong place is one of the most common reasons a second dwelling will not fit.

4. The physical site: what the land itself allows

Controls describe an envelope; the land decides how much of it is usable. Four physical checks catch most of the surprises.

Width, depth and shape. Minimum lot width matters as much as area. Within the State’s low and mid-rise housing areas, a dual occupancy needs a lot at least 12 metres wide; the complying development code generally asks for 15 metres at the building line. Battle-axe lots are excluded from the Low Rise Housing Diversity Code, so a rear lot usually means a DA.

Slope and stormwater. A site that falls away from the street may need an easement through a downhill neighbour’s land to drain stormwater. If the neighbour will not grant one, the options are expensive on-site solutions or a smaller scheme.

Trees. Clearing vegetation on urban land is controlled by the State’s Biodiversity and Conservation SEPP and by the council’s own DCP, which sets which trees need a permit. A significant tree, on the site or close to its boundary, can take a large bite out of the building footprint once its root zone is protected.

Access and services. Street trees, power poles, substations, bus stops and driveway crossings on the frontage all limit where a second driveway can go, and a second driveway is often what a duplex needs.

5. The numbers: what the project will cost and return

The last check brings the first four together. Work out a realistic yield, not a theoretical one: what the controls allow once setbacks, landscaped area, deep soil, overlays and site constraints are applied. The gap between those two figures is routinely one dwelling, and one dwelling is usually the margin.

Then add the costs a purchase price does not show. Local infrastructure contributions under section 7.11 or 7.12 are set by each council’s contributions plan. The State’s Housing and Productivity Contribution, in place since October 2023, adds roughly $10,000 per additional dwelling in Greater Sydney, indexed each year. Subdivision needs a Section 73 compliance certificate from Sydney Water, with its own charges and timing. Holding costs, approval timeframes and construction cost escalation all belong in the model before exchange, not after.

Finally, look at what the council is approving in practice. The NSW Planning Portal and council application trackers show recent determinations on nearby sites. A scheme that complies on paper but has no precedent in the street carries more risk than one that follows a pattern the council has already approved.

6. Summary table: five checks before exchange

Check	Where to look	What it can change
Planning controls	Section 10.7 planning certificate; LEP clauses 4.1, 4.3 and 4.4; DCP; Housing SEPP mapping	Whether the form you want is permissible, and how many dwellings fit.
Hazards and overlays	Planning certificate; NSW Planning Portal spatial viewer; bushfire and flood mapping	Whether complying development is available, floor levels, construction cost, yield.
Title	Title search; deposited plan; section 88B instrument; sewer service diagram	Easements, restrictions and pipes that fix where a building can go, or how many.
Physical site	Survey or site inspection; council tree controls; stormwater falls	Usable envelope, drainage solution, driveway access.
The numbers	Contributions plans; Housing and Productivity Contribution; recent approvals nearby	Whether the margin survives realistic yield, charges and timing.

7. Critical limitations and uncertainties

A planning certificate records what the council knows at the date it is issued. It is not a survey, it does not assess a particular scheme, and a clear certificate is not a guarantee that a proposal will be approved. The fuller section 10.7(5) advice is only as complete as the council’s records.

The rules are also moving. The low and mid-rise housing provisions have commenced in stages and have been refined since they were first exhibited, the Housing and Productivity Contribution is indexed and has been extended, and flood guidance continues to be updated. Figures quoted here, including the contribution rate, will change; the current instrument or fee schedule is the only reliable source on the day.

Much of the accessible commentary on pre-purchase checks is written by conveyancers, certifiers, designers and search providers with a commercial interest in a particular service, and it tends to present the most favourable or the most cautious reading. None of this replaces advice on the contract itself from a solicitor or conveyancer, and where a finding is finely balanced, a conversation with the council before exchange.

References

Policy updates

Housing SEPP changes: what they mean for duplexes

The Housing SEPP has been amended so often since it commenced in late 2021 that much of what is written about duplexes online is already out of date. For anyone weighing up a dual occupancy in NSW, three changes matter most: duplexes became permissible in every R2 zone in July 2024, a set of State standards now overrides council controls in the low and mid-rise housing areas from February 2025, and a fast-track complying development pathway for pre-designed homes opened in July 2025. Here is where each one stands, what it changed, and what it did not.

1. What the Housing SEPP is

State Environmental Planning Policy (Housing) 2021 brought several older housing policies, including those for affordable rental housing and seniors housing, into a single instrument. It sits above every council’s Local Environmental Plan (LEP): where the two conflict, the State policy generally prevails. That is why a change to the Housing SEPP can alter what is possible on a site overnight without the council changing a word of its own plan.

For duplexes, the SEPP now does two separate jobs. It decides where a dual occupancy is permissible, and in some areas it sets the numbers the design has to meet. The approval pathways, a development application (DA) or a complying development certificate (CDC), sit alongside it in other instruments.

2. July 2024: duplexes permitted in every R2 zone

The first stage of the Low and Mid-Rise Housing Policy started on 1 July 2024. It made dual occupancies and semi-detached dwellings permissible with consent in the R2 Low Density Residential zone across all of NSW. Before that, a handful of councils prohibited duplexes in R2 altogether, so neighbouring streets on either side of a council boundary could carry very different potential.

What Stage 1 did not change matters just as much. Permissibility is not yield. The council’s minimum lot size for dual occupancies, its height and floor space controls, and the setbacks, landscaping and parking rules in its Development Control Plan (DCP) all still apply. A site that was too small or too narrow for a duplex before July 2024 is usually still too small or too narrow today.

3. February 2025: State standards in the low and mid-rise housing areas

The second stage started on 28 February 2025. It applies to residential land within about 800 metres walking distance of a nominated town centre or train, metro or light rail station, in Greater Sydney, the Central Coast, the Lower Hunter and Newcastle, and Illawarra-Shoalhaven. The Bathurst, Hawkesbury, Blue Mountains and Wollondilly council areas are excluded because of bushfire, flood and evacuation risk, and the policy does not apply to sites affected by certain hazards, such as bushfire prone land and some flood prone land.

Inside those areas, a dual occupancy is subject to non-discretionary development standards:

Lot size and width. A minimum lot size of 450 square metres and a minimum width of 12 metres.

Floor space and height. A maximum floor space ratio of 0.65:1 and a maximum height of 9.5 metres.

Parking. One car space per dwelling.

Subdivision. In the R1, R2 and R3 zones, the two dwellings can be subdivided down to 225 square metres per lot, with a minimum width of 6 metres.

“Non-discretionary” has a specific meaning. Where a proposal meets one of these standards, the council cannot require more on that matter, and the standard prevails over a more onerous equivalent in the LEP or DCP. It does not guarantee approval. Every other matter, from privacy and overshadowing to stormwater and trees, is still assessed on merit.

4. The fast-track pathways

A duplex can be approved in one of three ways, and the Housing SEPP changes only affect which ones are open on a given site.

Development application. Assessed by the council on merit against the LEP, the DCP and the Housing SEPP. Slower, but flexible: it is the only route on heritage-listed land, in heritage conservation areas and on most constrained sites.

Complying development under the Low Rise Housing Diversity Code. Issued by a council or a registered certifier where the design meets fixed standards. The lot must meet the council’s minimum lot size for dual occupancies, or 400 square metres where the LEP sets none, and generally be at least 15 metres wide at the building line (12 metres where vehicle access is from a secondary road or lane). The code cannot be used on heritage items, in heritage conservation areas, on battle-axe lots or on unsewered land.

The Pattern Book pathway. Since July 2025, a set of pre-designed homes from the NSW Housing Pattern Book, including dual occupancies, can be approved as complying development in the R1, R2 and R3 zones where the housing type is permitted. A certifier must determine a pattern book application within 10 days of receiving all the required information. Bushfire prone land, flood control lots, battle-axe lots, unsewered land and heritage land are excluded, and the design has to be built as drawn, with only limited adjustments.

5. What it means for a duplex site today

A sound duplex assessment now works through five questions in order. Is a dual occupancy permitted? In R2, almost always yes since July 2024, but check the zone. Is the site inside a low and mid-rise housing area? If so, the State standards apply and usually help. Does the lot meet the minimum size and width for the pathway you want? That is where most sites fall out. Which approval pathway is realistically open, given heritage, bushfire, flood and lot shape? And can the result be subdivided onto separate titles, which is usually where the margin sits?

Costs have moved as well. A duplex in Greater Sydney now attracts the State’s Housing and Productivity Contribution on the additional dwelling, roughly $10,000 and indexed each year, on top of the council’s local contributions.

6. Summary table: the Housing SEPP and duplexes

Change	From	What it does for duplexes	What it does not do
Stage 1: R2 permissibility	1 July 2024	Dual occupancies and semi-detached dwellings permitted with consent in R2 across NSW.	Change lot size, height, FSR or DCP controls.
Stage 2: low and mid-rise housing areas	28 February 2025	Within about 800 m of nominated centres and stations: 450 m² lot, 12 m width, FSR 0.65:1, 9.5 m height, 225 m² subdivision.	Apply outside the mapped areas, on excluded hazard land or in the four excluded council areas.
Low Rise Housing Diversity Code	Existing CDC pathway	Fast approval where the lot meets the LEP minimum (or 400 m²) and is generally 15 m wide.	Apply in heritage areas, on battle-axe lots or on unsewered land.
Pattern Book pathway	July 2025	Pre-designed duplexes approved as complying development within 10 days.	Allow design changes beyond limited adjustments, or apply on bushfire, flood or heritage land.

7. Critical limitations and uncertainties

The settings are still moving. The low and mid-rise provisions have been refined since they were first exhibited, the Pattern Book has had designs added since launch, and councils are still bringing their own plans into line with the new standards. Figures and dates here reflect the published policy at the time of writing; the instrument in force on the day is the only reliable source.

Much of the commentary on the reforms comes from designers, builders, certifiers and buyers’ agents with an interest in more duplexes being built, and it tends to describe the most favourable reading. Early approval data under the new standards is thin, and there is little public evidence yet on how often non-discretionary standards are carrying proposals through council assessment.

Finally, the State standards cover only a handful of matters. Whether a particular duplex works on a particular lot still depends on the council’s LEP and DCP, the site’s hazards and title, and a design that responds to both. The reforms have widened what is possible; they have not removed the need to test each site.

References

Case study

Townhouse feasibility: Earlwood site, 2025

In 2025 an owner-developer came to us three weeks from exchange on a corner site of about 650 m² in Earlwood, in the Canterbury-Bankstown council area. The land was zoned R3 Medium Density Residential, and the plan was four townhouses. The question was simple: would the controls carry four? Six days later they had the answer: realistically three, with a development application (DA) risk profile their lender could work with. This is a walkthrough of how that review ran, what the controls allowed, and why the number changed. The client’s name is withheld and identifying details have been changed; their financial figures stay confidential.

1. The brief

The client had a contract in hand, a lender waiting for a feasibility, and a yield of four in their head. Four is a common assumption on a site of this size in a medium density zone: divide the land by the number of dwellings, allow for a driveway, and it looks like it fits. What that sum leaves out is the development control plan (DCP), the council’s detailed rulebook for setbacks, open space and building form. On a corner block the DCP bites harder than most people expect.

The brief was therefore narrow and time-bound: before exchange, confirm what the site could realistically yield, and identify anything that would make a DA risky enough to worry a lender.

2. Permissibility: the first gate

The starting point is the Canterbury-Bankstown Local Environmental Plan (LEP) 2023, the council’s legal planning instrument. It lists multi dwelling housing, the planning term for townhouses and villas, as permitted with consent in the R3 zone. “With consent” means a DA is needed; the use is allowed, but the design still has to be approved.

Permissibility is only the first gate. The LEP also sets a larger minimum lot size for multi dwelling housing in some mapped parts of the city, and the DCP asks for a minimum street frontage of 20 metres for this kind of development on a local road. Both need checking before anything else, because failing either can end a townhouse scheme outright. On this site both hurdles were cleared, so the real question was yield, not whether townhouses were allowed at all.

3. The corner-site envelope

The building envelope is the three-dimensional space a design can occupy once every setback and height limit is applied. For multi dwelling housing in the former Canterbury area, Chapter 5.2 of the Canterbury-Bankstown DCP 2023 sets controls that shape that envelope quickly:

Front setback: at least 6 metres from the front boundary on a local road in the R3 zone (9 metres on a major road).

Corner lots: at least 5.5 metres from the longer street frontage as well. On a corner, two sides of the site are street frontages, so both carry a deep setback.

Side setbacks: 1.5 metres for dwellings facing the street and 2.5 metres for buildings behind them.

Rear setback: at least 3 metres where the building is single storey, with deep-soil planting zones of 3 or 5 metres along the front and rear boundaries.

Height in storeys: two storeys at most, dropping to one storey for any part of a building more than 20 metres back from the street, or beyond 65% of the lot’s length.

Each control on its own looks modest. Together, on a corner, they remove a large share of the land from the building footprint, and the single-storey rule means the dwellings at the back of the site cannot simply go up to recover the space.

4. Testing four against three

We tested the envelope against the DCP setbacks rather than starting from a floor plan. That order matters: a floor plan drawn first tends to find a way to fit the number the client wants, while an envelope drawn first shows what the rules leave room for.

The open-space controls add to the squeeze. The DCP asks for 40 m² of private open space for each dwelling, including an area of at least 2.5 by 2.5 metres for outdoor dining, and ground-level open space needs to be at least 4 metres wide in every direction. Four dwellings need 160 m² of usable private yards; three need 120 m². On a lot of about 650 m² that difference is significant, because the yards have to sit inside the space left after the setbacks, the deep-soil zones and a shared driveway.

With four dwellings, the scheme only worked by pushing against several controls at once. That would have meant asking council to accept variations to the DCP setbacks, with the yards squeezed as a result, and each variation is a point where a DA can be refused, delayed or cut back. With three, the design sat comfortably inside the envelope. Our advice was that three was the realistic yield: four was not impossible to lodge, but it was not something a buyer should pay for.

5. A DA risk profile a lender can use

Lenders funding a development site want to know two things about the approval: how likely it is, and what could delay it. A feasibility that only reports the best case does not answer either. Alongside the yield, we set out a short risk profile for the three-dwelling scheme: which controls it met outright, where assessment judgement would still apply, and what could slow the DA, such as neighbour objections or requests for more information.

The value of that document was that it was honest in both directions. It did not promise an approval, and it did not bury the client in caveats. It gave the lender a clear, compliant scheme to assess instead of an optimistic one.

6. What changed for the client

The advice landed before exchange, which is the only point at which it could change the outcome. With a realistic yield of three rather than four, the client could test the price against a number the controls supported, and go into the purchase with a scheme their lender could back. The time cost was six days; the alternative was discovering the same answer after settlement, with a DA already drawn up for four.

Three lessons carry over to most townhouse sites:

Yield is set by the DCP, not the lot area. Dividing the land by a target dwelling size is a starting guess, not a feasibility.

Corner sites are not automatically better. Two street frontages mean two deep setbacks, and the gain in access is often smaller than the loss in footprint.

Test before exchange. A few days of work before the contract is signed is worth more than months of redesign afterwards.

7. Summary table: the review at a glance

Question	Control tested	Finding
Are townhouses allowed?	LEP 2023 land use table for the R3 zone; mapped minimum lot sizes	Permitted with consent; the site cleared the lot size and frontage hurdles.
How big is the envelope?	DCP Chapter 5.2 front, corner, side and rear setbacks; deep soil	Two street frontages take a large share of the site out of the footprint.
How high can it go?	Two storeys; one storey beyond 20 m or 65% of the lot’s length	The rear dwellings cannot build up to recover lost footprint.
Is there room for yards?	40 m² private open space per dwelling, 4 m minimum width at ground level	160 m² for four did not fit without variations; 120 m² for three did.
What is the realistic yield?	All of the above, tested as an envelope	Three, not four, with a compliant scheme and a clear DA risk profile.

8. Critical limitations and uncertainties

This is a single engagement, anonymised, and it should be read as an example of a method rather than a rule about Earlwood or about corner sites. Every lot differs in shape, slope, orientation and neighbours, and a site of the same area elsewhere could yield more or less.

The DCP figures quoted are those in the currently published Chapter 5.2, which has been amended since the review took place. Councils update their DCPs regularly, and some controls apply differently to particular streets, heritage items or major roads. The instrument in force on the day of lodgement is the only reliable source.

State policy can also override council controls. The NSW low and mid-rise housing reforms and the Transport Oriented Development program apply to land near some stations and centres in the Canterbury-Bankstown area, including around Turrella, where the walking catchment reaches into parts of Earlwood. Where those provisions apply, different standards and pathways may produce a different answer from the one reached here. Finally, planning feasibility is only one input: construction costs, sale prices and finance terms decide whether a scheme is worth building, and those figures are not reported here.

References

Feasibility

Understanding FSR: floor space ratio explained

Floor space ratio (FSR) is the single most important number in most residential feasibilities. It sets the maximum amount of floor area a site can carry, and floor area is what a developer builds, sells and borrows against. Yet it is often misread: people apply it to the wrong site area, count the wrong parts of the building, or treat the maximum as a target. This guide explains what FSR is, where the number comes from, what counts towards it, and how to use it to size a development before an architect is engaged.

1. What FSR is

FSR is the ratio of a building’s gross floor area to the area of its site. An FSR of 0.5:1 means the building may contain half a square metre of floor area for every square metre of land. On a 600 m² lot, that is a maximum of 300 m² of gross floor area; at 1:1 it would be 600 m².

The sum is simple: site area × FSR = maximum gross floor area. What makes FSR useful is that it turns a planning control into a quantity. Before a single line is drawn, it tells you roughly how much building the controls will allow, and therefore how many dwellings of a given size could fit and what the scheme might be worth.

FSR limits the total amount of floor area, not the building’s shape. The same 300 m² could be a single storey spread across the lot or two storeys over a smaller footprint. Height limits, setbacks, landscaped area and the development control plan (DCP) decide which shapes are possible. FSR decides how much building there can be.

2. Where the number comes from

In most council areas the maximum FSR is set by clause 4.4 of the Local Environmental Plan (LEP), the council’s main planning instrument, and shown on its floor space ratio map. Different parts of the same zone can carry different numbers, so the map, not the zone, is what tells you the figure for a particular lot.

Not every site has a mapped FSR. In some low density areas the LEP leaves the land unmapped, and bulk is controlled by height, setbacks and landscaped area in the LEP and DCP, or by a floor area table in the DCP that changes with lot size. Where no FSR applies, the building’s shape carries the whole limit, and yield has to be tested by drawing the envelope rather than multiplying a number.

State policy can also set the figure. Within the NSW Government’s low and mid-rise housing areas, the Housing SEPP sets an FSR of 0.65:1 for dual occupancies in the R2 zone, and that standard applies over the council’s own control unless the local figure is more generous. The complying development codes carry their own floor area limits too. The question is never just “what is the FSR?” but “which instrument sets it for this site and this type of development?”

3. What counts: gross floor area

FSR is only as reliable as the floor area measured against it. The standard definition of gross floor area, used in every LEP written on the State template, measures each floor from the internal face of the external walls, at a height of 1.4 metres above the floor. It adds together every floor of the building.

It includes mezzanines, and habitable rooms in a basement or an attic.

It excludes the parts of a building that do not add usable floor space:

Circulation and services: common lifts and stairs, plant rooms and areas used only for mechanical services.

Basement areas: storage, vehicle access, loading, garbage and services.

Car parking: the parking needed to meet the council’s requirements, and its access. Parking beyond the requirement generally counts.

Outdoor spaces: terraces and balconies whose outer walls are less than 1.4 metres high.

Voids above a floor, such as the upper part of a double-height living room.

The detail matters more than it looks. Enclosing a balcony, or raising its wall above 1.4 metres, can turn it into gross floor area. A basement room that is really a habitable room can be counted even if the plans label it storage. The NSW Land and Environment Court has decided a series of cases on exactly these edges, from enclosed corridors to rooftop stairs, and the outcome has turned on the precise words of the definition rather than on how big the building looks.

4. What counts: site area

The other half of the ratio is the site area, and clause 4.5 of the LEP sets how it is calculated. The starting point is the area of the land the development application covers. Several details change the figure:

Adjoining lots can be combined into one site area only where they share a boundary and development is proposed on each of them.

Floor area already used cannot be counted twice. Where part of a site has already carried development counted against its FSR, that area cannot be used again for a new building.

Access handles and splays. Some councils’ controls treat the access handle of a battle-axe lot, or land set aside for road widening, differently for particular purposes. It is worth checking before applying the FSR to the whole area on the title.

A small difference in site area moves the result. On a 0.5:1 control, every 10 m² of site area is 5 m² of floor area, and on a two-dwelling scheme that can be the difference between a third bedroom and a study.

5. Using FSR to size a development

Before engaging an architect, FSR gives a quick and defensible first estimate of yield. Take a 650 m² lot with a mapped FSR of 0.5:1. The maximum gross floor area is 325 m². For two dwellings, that is about 160 m² each; for three, about 108 m² each. Whether three dwellings of that size would sell in that suburb is a market question, but the arithmetic has already framed it.

Three cautions keep the estimate honest.

FSR is a ceiling, not a target. Height, setbacks, landscaped area, private open space and parking often stop a design before it reaches the maximum. On a narrow or sloping lot, the achievable floor area can sit well below the FSR, and the DCP rather than the LEP becomes the real limit.

Gross is not saleable. Gross floor area is measured to the inside of the external walls but includes internal walls, private stairs and other space buyers do not count as living area. Saleable area is lower, and the gap widens as dwellings get smaller.

Test it against the envelope. The first estimate is only confirmed once the setbacks and height are drawn. If the envelope cannot hold the floor area the FSR allows, the envelope wins.

6. When the number can be exceeded

FSR is a development standard, so a development application can ask to exceed it under clause 4.6 of the LEP. The applicant has to show in writing that compliance is unreasonable or unnecessary in the circumstances and that there are sufficient planning grounds to justify the breach. Small variations on well-designed schemes are approved regularly; large ones, or ones that simply add floor area for its own sake, are not.

Two limits apply. Complying development has no equivalent of clause 4.6: a scheme that exceeds the code’s floor area limit by any amount has to go through a DA instead. And a variation is never certain until it is granted. A feasibility that only works with extra floor area should be priced as a riskier project, not as the base case.

7. Summary table: FSR at a glance

Question	Where the answer sits	Why it matters
What is the maximum?	LEP clause 4.4 and the FSR map; the Housing SEPP in the low and mid-rise housing areas	Site area × FSR = maximum gross floor area.
No FSR mapped?	Height, setbacks and landscaped area in the LEP and DCP, or a DCP floor area table	Yield has to be tested by drawing the envelope.
What floor area counts?	The LEP definition of gross floor area	Balconies, basements, voids and parking can tip a scheme over or under.
What site area counts?	LEP clause 4.5, and any DCP rules on access handles or road widening	Every 10 m² of site area at 0.5:1 is 5 m² of floor area.
Can it be exceeded?	LEP clause 4.6, for DAs only	Possible with a strong written case; never the base case.
Will the design reach it?	Height, setbacks, open space and parking controls	FSR is a ceiling, not a target.

8. Critical limitations and uncertainties

The figures and definitions here follow the standard LEP template. Every council adopts it with local mapping, and some add local clauses that change how FSR applies to particular zones, lot sizes or types of development. The council’s LEP and DCP as currently in force are the only reliable source for a specific site.

How gross floor area is measured continues to be tested in the Land and Environment Court, and councils do not always apply the definition consistently. Where a scheme depends on whether a balcony, basement room or void is counted, that question is worth settling with the council early, before the design is finalised.

Finally, the worked examples are illustrations, not valuations. Converting floor area into dwellings, and dwellings into a feasibility, depends on construction costs, sale prices, contributions and finance, none of which the FSR can tell you.

References

Development tips

How to read a planning certificate in ten minutes

Every contract for the sale of land in NSW comes with a planning certificate. It is the council’s official statement of the rules that apply to the property on the day it was issued. No other document in the contract says more about what you can build there. Yet most buyers flick past it, because it runs to eight or ten pages of headings and legal references. Read in the right order, the parts that matter take about ten minutes. This guide sets out that order, what each part tells you, and what the certificate will never tell you.

1. What a planning certificate is

A planning certificate is issued by the local council under section 10.7 of the Environmental Planning and Assessment Act 1979, the Act that runs the NSW planning system. Most people call it a “10.7 certificate”. It comes in two parts.

The 10.7(2) certificate covers a fixed list of matters set by the State in Schedule 2 of the Environmental Planning and Assessment Regulation 2021. They include the planning instruments that apply, the zone, whether complying development is possible, hazards such as flooding and bushfire, and land needed for roads or other public uses. There are 24 sections in the current list, and most councils set their certificates out in that order.

The 10.7(5) advice is extra information the council chooses to add, such as tree rules, salinity or the land’s contamination history. Councils are not obliged to give it, and the Act protects them from liability for advice given in good faith.

When a property is sold, the vendor must attach the 10.7(2) certificate to the contract. It is one of the “prescribed documents” under the Conveyancing (Sale of Land) Regulation 2022. If it is missing, the buyer can usually rescind the contract by written notice within 14 days of exchange. The 10.7(5) advice does not have to be attached, so it is often left out.

Anyone can order a certificate for any property. The fee for the basic certificate is set by the State. At Inner West Council in 2026–27 it is $62, or $156 with the council’s extra advice, and most councils issue a certificate within about five business days. Where the council takes part, you apply through the NSW Planning Portal; otherwise you apply through the council’s own online service.

2. Minute one: the right land, and the date

Start with the first page. Check that the lot and DP (the lot and deposited plan number, the land’s legal description) match the title search in the contract. A certificate for the wrong lot, or for only one of two lots in the sale, is more common than it should be. For a unit, the certificate covers the whole strata plan, not just the one apartment.

Then look at the date. A certificate is a snapshot: the information applies as at the day it was issued. The one in a contract may be weeks or months old, and a new State policy, a council rezoning or a newly mapped hazard since then will not appear on it. If your decision depends on what the land can carry, order a fresh certificate before you exchange.

3. Minutes two to four: the rules and the zone (sections 1 and 2)

Section 1 names the planning instruments that apply to the land: the council’s Local Environmental Plan (LEP, its main set of planning rules), the State Environmental Planning Policies (SEPPs, the State-wide rules) and the Development Control Plans (DCPs, the council’s detailed design rules). It also lists draft instruments and draft DCPs that have been publicly exhibited but not yet made (drafts more than three years old can be left off). A draft is a proposed change: a rezoning, a new heritage listing, a new height limit. It may never be made, but if it is, it can change what the site can carry, so note every draft listed.

Section 2 is the heart of the certificate. It states:

• the zone, such as R2 Low Density Residential or R3 Medium Density Residential;
• the uses allowed without consent, the uses that need development consent, and the uses that are prohibited;
• whether any additional permitted uses apply to this particular land;
• whether a development standard fixes minimum land dimensions for building a dwelling house;
• whether the land is in an area of outstanding biodiversity value;
• whether it is in a conservation area, which in most Sydney councils means a heritage conservation area;
• whether a heritage item is on the land.

Read the list of uses with your plan in mind. If you want to build a dual occupancy (two dwellings on one lot) or multi dwelling housing (townhouses), find that term in the “with consent” list. If it appears under “prohibited”, the LEP will not allow it, whatever the lot size. A heritage item or a conservation area will not stop a project, but it shapes the design, slows approval and rules out most complying development.

Notice what section 2 does not give you: the numbers. Height limits, floor space ratio (FSR, how much floor area the site may carry) and the minimum lot size for subdivision sit on the LEP maps, and setbacks sit in the DCP. The certificate tells you which documents to open, not what they say.

4. Minutes four to five: complying development (sections 4 and 5)

Complying development is the fast-track approval route: a complying development certificate (CDC) can be issued by a council or a private certifier in weeks, if a project meets the fixed standards of a State code. Section 4 goes through each code and says whether complying development may be carried out on the land. The two that matter most for housing are the Housing Code, for new houses, and the Low Rise Housing Diversity Code, for dual occupancies and terraces. Where it cannot, the certificate gives the reason, such as a heritage conservation area or a flood control lot.

For a buyer, a “no” here is a timing and cost question. It does not mean the project is impossible; it means it needs a development application (DA) to council, which takes longer and is assessed on merit. Our article DA vs CDC: which path suits your project? explains the difference. Watch for a note that a restriction applies to only part of the land, which is common on large or sloping lots. Section 5 covers exempt development, the minor works that need no approval at all.

5. Minutes five to seven: the hazards (sections 9 to 13)

This is where the expensive surprises live.

Flooding (section 9). States whether flood-related development controls apply. If they do, some or all of the land is usually in the flood planning area, where new homes need floor levels raised above a set flood level and other flood-safe design. On a small lot that can push a building up, add cost and change how it meets the street.

Other hazards (section 10). Lists council or government policies that restrict development because of risks such as landslip, subsidence, acid sulfate soils, contamination, aircraft noise, salinity, tidal inundation, and coastal hazards and sea level rise. Each one points to a report or a design response you will need to budget for.

Bushfire (section 11). States whether the land is bush fire prone. If it is, new building has to meet the NSW Rural Fire Service’s bushfire protection standards. These can set construction levels and setbacks from vegetation, and at the highest risk levels they rule out complying development.

Loose-fill asbestos (section 12) and mine subsidence (section 13). These state whether the home is on the NSW register of houses affected by loose-fill asbestos insulation, and whether the land is in a mine subsidence district. In a mine subsidence district, new building may need approval from Subsidence Advisory NSW. Both are rare in most of Sydney, but serious where they apply.

If the Environment Protection Authority has made declarations or orders about contamination on the land under the Contaminated Land Management Act 1997, the certificate must say so. Treat any contamination reference as a reason to get advice before exchange.

6. Minutes seven to eight: land the public may need (sections 3, 7 and 8)

Contributions (section 3). Names the council contributions plans that apply, including any drafts. Development contributions are charges on new development that pay for local infrastructure such as parks, roads and drainage. In Greater Sydney, the Central Coast and the Illawarra, the State also charges its Housing and Productivity Contribution on most new housing. On a dual occupancy or a townhouse project the two together can run to tens of thousands of dollars, so look up the rates before you price the site.

Land reserved for acquisition (section 7) and road widening or realignment (section 8). State whether any of the land is set aside for a public purpose or affected by a planned road change. Either can take a strip off the site, reduce the area the controls are measured against and move the building line back. A “yes” here deserves a call to the council before you go any further.

7. Minute nine: the rest at a glance (sections 6 and 14 to 24)

The remaining sections cover narrower matters: notices about defective buildings and building products such as cladding (section 6), paper subdivisions, vegetation and biodiversity agreements, court orders about trees between neighbours, coastal protection charges, the Western Sydney Aerotropolis, conditions on seniors and affordable rental housing, water and sewerage services, and special entertainment precincts. For most residential land in Sydney, nearly all of these read “no” or “not applicable”. Skim them for any “yes”: each one is a question to ask before you buy.

8. Minute ten: the council’s extra advice (10.7(5))

If the certificate includes the 10.7(5) part, read it last. Councils use it for whatever else they know: tree preservation rules, threatened plant communities, salinity, past uses of the land, local studies under way. The notes are worth having, but they are not a complete list. The absence of a matter from the 10.7(5) advice does not mean the land is unaffected by it. For a development site, the extra fee for the full certificate is money well spent.

9. What the certificate will not tell you

A planning certificate is about planning controls. Several things that shape what you can build sit elsewhere in the contract or need their own checks:

• Easements, covenants and restrictions on the title, such as a right of carriageway or a restriction on the number of dwellings. These are in the title search and the registered instruments attached to the contract.
• Sewer and stormwater pipes running through the lot, which can stop you building over part of it. Check the sewerage service diagram and the water authority’s asset records.
• The controls themselves: height, FSR, lot size and setbacks, from the LEP maps and the DCP.
• Whether a particular scheme will be approved. A clear certificate is not an approval, and a certificate with flags is not a refusal.

The free Reading a planning certificate checklist puts the key checks on one page you can take to an inspection.

10. Summary table: the ten-minute read

Minute	Where to look	What to look for
1	First page	Lot and DP match the title; the issue date is recent.
2–4	Sections 1 and 2	The LEP, SEPPs and DCPs; any exhibited drafts; the zone; your use in the “with consent” list; heritage.
4–5	Sections 4 and 5	Whether complying development is possible under each code, and why not.
5–7	Sections 9 to 13	Flood controls, other hazards, bushfire, loose-fill asbestos, mine subsidence, contamination notes.
7–8	Sections 3, 7 and 8	Contributions plans; land reserved for acquisition; road widening.
9	Sections 6 and 14 to 24	Any “yes” among the narrower matters.
10	The 10.7(5) advice	Tree rules, salinity, past uses and anything else the council knows.

11. Critical limitations and uncertainties

A planning certificate records what the council knows on the day it is issued. Rules change after that date, and the council’s records can be incomplete, particularly for contamination, past uses and recently mapped hazards. Councils also present the same prescribed matters in different layouts and with different levels of detail, so a certificate from one council can look quite different from another.

The section numbers and contents described here follow Schedule 2 of the Environmental Planning and Assessment Regulation 2021 as it stands in October 2026. The State has changed the list before and will again, and fees are set each financial year.

This guide explains how to read the document; it is not legal advice about a contract. Rescission rights, timing and what to do about a missing or outdated certificate are questions for your solicitor or conveyancer. Whether a particular project will be approved can only be tested against the full LEP, DCP and State policies for the site.

References