Do I need a DA or a CDC for my NSW project?

Use a CDC if your project is straightforward and fully complies with the Codes SEPP — typical examples are new 1–2 storey homes, granny flats, renovations and pools. Use a DA when the project is complex, affects heritage or bushfire-prone land, exceeds CDC limits on height/FSR/setback, or is multi-dwelling/commercial. Minor low-impact work may be exempt from both.

How long does a CDC take in NSW?

According to the NSW Planning Portal, complying development approvals can be issued in as little as 20 days, or 10 days for the NSW Housing Pattern Book complying pathway. Because there is no neighbour notification and assessment is against fixed codes, the timeline is predictable.

How much does a CDC cost in NSW?

A CDC typically costs $3,000–$6,000 all-in, covering the certifier's fee and the document set. It is cheaper than a DA because no Statement of Environmental Effects or environmental reports are required when the project fully complies with Codes SEPP standards.

What documents do I need for a DA or CDC?

Core documents for both pathways: certificate of title and deposited plan, scaled site plan with setbacks and easements, floor plans, elevations and sections, BASIX certificate (for residential), cost estimate of works, and owner's consent. DAs additionally require a Statement of Environmental Effects and may need heritage, bushfire (BAL), acoustic or stormwater reports.

DA vs CDC Approval in NSW: Which Pathway Is Right for Your Project?

Compare NSW's two building approval routes — Development Application (DA) and Complying Development Certificate (CDC) — on cost, timeline and documentation.

TL;DR: Most Sydney residential projects fall under one of two NSW approval pathways. A Development Application (DA) is needed for larger or more complex works and is assessed by your local council — typically 30–90+ days with fees from $1,500 to $15,000+. A Complying Development Certificate (CDC) covers straightforward, code-compliant builds, can be issued by a private certifier or council in as little as 10–20 days, and usually costs $3,000–$6,000 all-in. If your project is minor and meets exempt development rules, neither is required.

What Is a Development Application (DA)?

A Development Application is a formal request to your local council for permission to carry out building work, renovations, subdivision, or a change of land use. In New South Wales, DAs are assessed under the Environmental Planning and Assessment Act 1979 and your council's Local Environmental Plan (LEP) and Development Control Plan (DCP).

You'll need a DA when your project:

Doesn't meet exempt development or complying development standards
Significantly alters the building's use, structure or footprint
Affects heritage items, environmentally sensitive land, or bushfire-prone areas
Exceeds CDC height, floor space ratio (FSR), setback or site coverage limits
Involves multi-dwelling housing, boarding houses, or most commercial works

What Is a Complying Development Certificate (CDC)?

A CDC is a fast-tracked combined planning and construction approval for straightforward projects that fully comply with the State Environmental Planning Policy (Exempt and Complying Development Codes) 2008 — known as the Codes SEPP. A CDC can be issued by either your council or a private accredited certifier.

Common CDC projects include:

New 1 and 2-storey dwelling houses
Granny flats and secondary dwellings
Home renovations and extensions
Swimming pools, fences, and retaining walls
Demolition (as part of a complying build)
Strata subdivision of an approved building

DA vs CDC: Side-by-Side Comparison

	Development Application (DA)	Complying Development Certificate (CDC)
Who approves	Local council	Council or accredited private certifier
Typical timeline	30–90+ days (median tracked on NSW Faster Assessments league table)	10–20 days (10 days for NSW Housing Pattern Book pathway)
All-in cost range	$5,000–$15,000+ (council fees + reports + plans)	$3,000–$6,000 (certifier fee + plans)
Public notification	Usually 14 days (neighbours can object)	No neighbour notification required
Assessment basis	Merit-based against LEP + DCP	Coded compliance against Codes SEPP
Environmental impact	May require SEE, heritage, bushfire (BAL), acoustic, stormwater reports	Not required if fully code-compliant
Best for	Complex, larger, or non-standard projects	Standard residential work that fits the Codes SEPP

How Much Does a DA Cost in NSW?

Total DA cost is the sum of three components:

Council DA fee — calculated on the estimated cost of works. For a $500K build this is typically $1,500–$3,000 depending on council.
Specialist reports — Statement of Environmental Effects (SEE), BASIX certificate, stormwater, bushfire (BAL), acoustic, arborist. Budget $2,000–$8,000 depending on site complexity.
Design & drafting — architectural plans, elevations and sections to council standards. See our Information Drawing Sheets page for what's required.

Each council publishes a yearly Fees and Charges schedule — see Cumberland, Camden, or your local council's site for the current figure.

How Long Does a DA Take in NSW?

Statutory assessment periods sit around 40–60 days, but real-world DA timelines vary widely by council — typically 30 to 90+ days for residential work. The NSW Government's Faster Assessments Program league table tracks median determination times for every NSW council.

The most common cause of delay is an incomplete application: more than one in three DAs are returned via a Request for Further Information (RFI), adding 30–50 days to the process. Engaging a Registered Design Practitioner at the documentation stage materially reduces RFI risk.

How Long Does a CDC Take?

The NSW Planning Portal confirms CDCs are issued in as little as 20 days — and 10 days under the NSW Housing Pattern Book complying pathway introduced in 2024–26. Because no neighbour notification is required and assessment is against fixed codes, the timeline is far more predictable than a DA.

To start, you'll need a registered certifier (search the NSW Fair Trading Building Certifiers Public Register), a certificate of title, and code-compliant plans.

Which Approval Pathway Applies to Your Project?

Use this quick decision logic:

Granny flat or secondary dwelling on a standard residential lot → almost always CDC if it meets Codes SEPP size and setback rules
New single or two-storey dwelling on a flat, unconstrained lot → CDC if fully code-compliant, DA otherwise
Renovation or extension within existing envelope → likely CDC; outside envelope → DA
Duplex, townhouse, or multi-dwelling → typically DA due to FSR and height limits
Heritage item or conservation area → DA required
Bushfire Attack Level (BAL) 40 or Flame Zone → DA required (CDC excludes highest BAL ratings)
Minor work under exempt thresholds (small deck, pergola, garden shed) → no approval needed at all

Not sure? Use the NSW Planning Portal Spatial Viewer to check your site's zoning and constraints — or book a free consultation and we'll advise the best pathway in a 15-minute call.

Documents You'll Need for Either Pathway

Both DA and CDC require a core document set:

Certificate of title and deposited plan
Site plan to scale showing boundaries, setbacks, easements
Floor plans, elevations, and sections
BASIX certificate (residential)
Cost estimate of works
Owner's consent

For a full breakdown including DA-only extras (SEE, heritage, acoustic, stormwater) see our DA & CDC Checklist.

How giantA Helps

At giantA Pty Ltd, we prepare both DA and CDC submissions for Sydney and regional NSW residential projects. As a Registered Design Practitioner under the Design and Building Practitioners Act 2020, we deliver:

Pathway advice — DA vs CDC vs exempt for your specific site
Full architectural drawing packages to council and certifier standards
BASIX and NatHERS compliance certificates
Lodgement through the NSW Planning Portal and RFI responses
Coordination with council or private certifier through to approval

Book a free pathway consultation — we'll tell you which route applies, what it will cost, and how long it will take, before you commit.