What disqualifies a property from CDC in NSW?

A property may be excluded from the CDC pathway if it is: a heritage item or within a heritage conservation area; on bush fire prone land; in a flood planning area; affected by acid sulfate soils; within a mine subsidence area; or if the proposal does not meet all non-discretionary development standards such as minimum lot size, frontage, setbacks or height. A single failed standard disqualifies the CDC and requires a DA instead.

How is a CDC different from a Development Application (DA)?

A CDC is issued by a private certifier when a proposal meets non-discretionary standards — there is no council discretion and no merit assessment. A DA is lodged with council and assessed on its merits, allowing council to impose conditions and exercise judgment. CDCs are faster (minimum 20 business days) but require the proposal to comply exactly with all standards. DAs take longer but can proceed where a CDC is not available.

SiteScope | Property Development Feasibility & Analysis

Q: What is a CDC in NSW?

A Complying Development Certificate (CDC) is a fast-track approval pathway for residential development in NSW. Instead of a Development Application assessed by council, a CDC is assessed and issued by a private certifier (or council) where the proposal meets all non-discretionary standards set in a State Environmental Planning Policy (SEPP). The minimum determination period for a residential CDC is 20 business days.

What is a CDC?

Complying Development — the fast-track approval pathway.

A Complying Development Certificate (CDC) is a combined planning and construction approval that bypasses council assessment for eligible development. It is issued by a private certifier (or council) once the proposal is confirmed to meet all non-discretionary development standards set in a State Environmental Planning Policy (SEPP).

For residential development, the two main SEPPs that enable CDC are the Housing SEPP 2021 (for single dwellings, dual occupancy and low-rise multi-unit) and the Exempt and Complying Development Codes SEPP 2008. These set the rules that a proposal must meet exactly — there is no discretion.

The minimum determination timeframe for a residential CDC is 20 business days from lodgement, considerably faster than a typical Development Application (DA) through council.

The NSW Planning Portal provides an online CDC tool that can indicate whether specific development types may be complying development for a property. SiteScope's scan identifies the planning controls — zone, overlays and LEP standards — that directly affect CDC eligibility.

CDC vs DA

How does CDC differ from a Development Application?

Factor	CDC — Complying Development	DA — Development Application
Assessed by	Private certifier (or council)	Council — merit assessment
Minimum timeframe	20 business days	40–220+ days (varies by council)
Council discretion	None — pass/fail on standards	Full merit and conditions
Standards	Non-discretionary — must be met exactly	Merit-based — can negotiate
Cost (approx.)	Certifier fee — typically lower	DA fee + consultant fees — higher
Flexibility	Zero — one failed standard = ineligible	Some — SEPP, DCP, variations possible
Public notification	Generally not required	May be required (neighbour notification)
When to use	Site and proposal meet all CDC standards	CDC excluded, or council approval preferred

CDC eligibility

What must a site meet to qualify for CDC?

CDC eligibility is not just about the proposed development — it also depends on the site itself. Both the site and the proposal must meet all applicable standards. A single failed condition disqualifies CDC, and a DA is required instead.

✓

Zone permissibility — The development type must be permitted in the zone. For dual occupancy CDC, this applies in R1, R2, R3 and RU5 zones following recent NSW reforms, subject to LEP controls.

✓

Minimum lot size — The lot must meet the minimum size set in the applicable SEPP for the development type. This varies by development type and may be modified for TOD or LMR precincts.

✓

Minimum frontage — The lot must have sufficient street frontage as specified in the SEPP. Narrow lots frequently fail this standard, requiring a DA instead.

✓

Setbacks, height and FSR — The proposed building must fit within the setbacks, height limit and floor space ratio set in the SEPP standards. The proposal must meet all of these simultaneously.

✓

No applicable exclusions — The site must not be subject to any of the CDC exclusions listed below. A single exclusion — heritage, flood, bushfire — removes CDC eligibility regardless of whether the other standards are met.

CDC exclusions

What disqualifies a site from CDC?

The following site characteristics exclude the CDC pathway under the Housing SEPP 2021 and the Exempt and Complying Development Codes SEPP. These are determined at the site level — the proposal cannot overcome them.

🏛️ Heritage

Heritage items and heritage conservation areas are excluded from CDC. A DA is required, and consent conditions will apply to protect heritage significance.

🌊 Flood planning area

Properties within a flood planning area as mapped by council or the NSW Government are excluded from CDC. A flood report and additional mitigation measures may be required via DA.

🔥 Bush fire prone land

Land mapped as bush fire prone is excluded from CDC for residential development. A Bushfire Attack Level (BAL) assessment is required and the property must comply with Planning for Bush Fire Protection 2019 via DA.

⚗️ Acid sulfate soils

Sites within acid sulfate soils mapping require additional assessment under a DA. Disturbance of acid sulfate soils can release sulphuric acid, requiring management plans.

⛏️ Mine subsidence

Sites in mine subsidence districts require approval from the Mine Subsidence Board in addition to development consent. CDC is excluded for land in these areas.

☣️ Contaminated land

Land listed on a contaminated land register or in areas with a history of contaminating activities requires additional assessment via DA. Remediation may be required before development can proceed.

Important: This list is not exhaustive. Other factors — proximity to certain land uses, environmental protection zones, drainage constraints, or council-specific controls — may also affect CDC eligibility. Always confirm with a licensed private certifier or town planner before proceeding with any development application.

How SiteScope helps

What the free scan checks — and what requires professional verification.

What the scan checks

Zone and permitted development types
FSR and maximum height from the LEP
Lot area from the NSW cadastre
Heritage overlay status
Flood overlay mapping
Bushfire prone land status
TOD and LMR precinct status
Development potential score including CDC pathway indication

What requires professional advice

Full CDC eligibility assessment (licensed certifier)
Exact lot frontage and dimensions (survey required)
DCP controls — setbacks, parking, landscaping
BASIX requirements for thermal performance
Mine subsidence and acid sulfate soil checks
Stormwater drainage and utility connections
Strata plan requirements post-construction

Check your property's CDC potential — free

Enter any NSW address to see zone, overlays and approval pathway indication. No account required.

Run a free property scan

NSW legislation and government references

The rules CDC is built on.

CDC in NSW operates under State Environmental Planning Policies made under the Environmental Planning and Assessment Act 1979. The key instruments:

Housing SEPP 2021 — Covers single dwellings, dual occupancy (including CDC pathway), secondary dwellings and low-rise multi-dwelling housing. Consolidates earlier policies. Available via the NSW Planning Portal and legislation.nsw.gov.au.

State Environmental Planning Policy (Exempt and Complying Development Codes) 2008 — Sets the Complying Development Codes including the General Housing Code and the Housing Alterations Code for smaller residential works.

Environmental Planning and Assessment Act 1979 (NSW) — The primary legislation governing all development consent in NSW. Part 4 covers development applications; Part 4A covers complying development.

NSW Planning Portal — Online CDC Tool — The NSW Government's free online tool to check whether a specific development type may qualify as complying development for a property address. Available at planningportal.nsw.gov.au.

Planning legislation in NSW changes regularly. SiteScope retrieves live planning data from the NSW Planning Portal APIs at the time of each scan. Always verify current rules with the relevant council or a licensed professional before making any decision.

Common questions

Questions about CDC in NSW.

What is a CDC in NSW?

A Complying Development Certificate (CDC) is a fast-track planning and construction approval issued by a private certifier (or council) for eligible residential development. The proposal must meet all non-discretionary standards set in a State Environmental Planning Policy — there is no council discretion. The minimum determination period is 20 business days.

Is CDC always faster than a DA?

Yes, in terms of the approval timeframe. CDC has a 20 business day minimum; a DA can take 40 to 220+ days depending on council. However, CDC is only available when the site and proposal meet all eligibility standards exactly. If any standard cannot be met, a DA is required regardless of timing preferences.

Can I build a dual occupancy or duplex via CDC?

A dual occupancy (attached or detached) may be eligible for CDC in R1, R2, R3 and RU5 zones under the Housing SEPP 2021, provided the site meets all non-discretionary standards including minimum lot size, frontage, setbacks and is not subject to any CDC exclusions. See the duplex eligibility guide for the specific controls.

Who issues a CDC?

A CDC is issued by an accredited certifier — a licensed private certifier or council in its role as a certifier. The certifier assesses the application against the relevant SEPP standards and, if fully compliant, issues the CDC. You will still need construction certificates and inspection stages during and after construction.

What happens if my site fails one CDC standard?

The CDC pathway is no longer available. You must lodge a Development Application (DA) with the relevant council instead. Unlike CDC, a DA allows for merit assessment and the possibility of negotiation over some standards, though council has the discretion to refuse or impose conditions.

Does SiteScope's scan confirm CDC eligibility?

SiteScope's free scan checks the planning controls that are most relevant to CDC eligibility — zone, overlays (heritage, flood, bushfire), lot area, FSR and height. It can indicate whether a site is likely or unlikely to be eligible for CDC. However, full CDC eligibility must be confirmed by a licensed certifier before lodgement, as the certifier must assess the complete set of SEPP standards against the specific proposal and site dimensions.

Related guides

CDC eligibility check NSW — does your property qualify for Complying Development?