CDC vs DA: Which Approval Do You Actually Need?

A fast-track approval is for a proposal that meets every applicable standard exactly: the assessor works down a checklist, and if you tick every box they must approve it. A full development application is a merit assessment, where a planner weighs your proposal on its merits, the public usually gets a say, and the standards can be varied — which buys you flexibility at the cost of time, money and certainty.

Every Australian state and territory runs both pathways. The names change at the border — CDC in NSW, VicSmart in Victoria, code assessment in Queensland, deemed-to-satisfy in South Australia — but the underlying deal is identical everywhere: comply completely and you get speed; ask for discretion and you get scrutiny.

The real difference is discretion, not speed

Speed is the symptom; the cause is that a fast-track assessor has no power to exercise judgement. If the code says a 900 mm side setback and your plan shows 880 mm, the certifier cannot approve it — not because 20 mm matters, but because they have no legal ability to weigh whether it matters.

A merit assessment is the opposite. A council planner can accept a shortfall if you justify the outcome — better solar access, a retained tree, a streetscape that works. That discretion is why a DA can approve things a code never could, and also why it can be refused, delayed by objections or conditioned in ways you did not want. So the real question is not "which is faster" but "is my proposal fully compliant, and do I want it to be?"

Fast track vs full application at a glance

What it's called in your state

• NSW — a Complying Development Certificate (CDC) under the Codes SEPP, issued by council or an accredited private certifier on a 20-day statutory clock, or 10 days via the Housing Pattern Book pathway for eligible pre-drawn terraces, townhouses, manor homes and dual occupancies. Anything else is a Development Application (DA) to council, where the state benchmark has sat around 105 gross days and council performance ranges from weeks to well over 200 days.
• VIC — VicSmart is the fast track: a listed class of straightforward application, decided in 10 business days, with no public notice and no third-party appeal. Everything else is a standard planning permit on a 60-day clock. Since 31 March 2025 the Townhouse and Low-Rise Code has added deemed-to-comply standards to Clause 55 — meet them and council must issue the permit, and objectors cannot go to VCAT.
• QLD — three levels of assessment. Accepted development needs no application. Code assessable is judged only against the applicable codes, is not publicly notified, and carries a 35 business day decision period. Impact assessable is judged against the whole scheme, requires at least 15 business days of public notification, and gives submitters appeal rights — realistically several months.
• SA — the Planning and Design Code sorts proposals into accepted, deemed-to-satisfy, performance assessed and restricted. A deemed-to-satisfy application meets every DTS criterion and must be granted, so it moves fast — five business days of verification plus a short assessment. Performance assessed runs to roughly 25 business days, longer with notification, referrals or a panel.
• WA — the fast track is usually no planning approval at all: under most local planning schemes a single house meeting the deemed-to-comply provisions of the R-Codes is exempt and goes straight to a building permit. Vary a standard and you need a development application judged against the design principles — 60 days, or 90 where it must be advertised.
• TAS — a proposal is no permit required, permitted or discretionary. Permitted means you satisfy every acceptable solution, council must grant the permit, and the statutory period is 28 days. Rely on a performance criterion and it becomes discretionary: 42 days, including 14 days of public notification and the objection rights that come with it.
• ACT — exempt development versus a development application. Under the Planning Act 2023, single dwelling work meeting the exempt development controls needs no DA, and minor encroachments can be handled by an exemption declaration decided in about 10 working days. Everything else is a DA to the Territory Planning Authority, notified for 15 working days, with decisions near 30 working days — around 45 where representations are received.
• NT — zone tables list uses as permitted or as requiring consent. A permitted use meeting every applicable requirement of the NT Planning Scheme needs no consent, and Schedule 3 exempts further low-impact works. Anything else needs a development permit from the consent authority, usually the Development Consent Authority — and advertised applications are decided at a scheduled DCA meeting, so the meeting calendar drives the timeline.

When you can't use the fast track

This is where most people come unstuck. Fast-track pathways are switched off by site characteristics long before anyone looks at your design — and those characteristics are invisible from the kerb:

• Heritage. A heritage item or a property in a heritage conservation area is excluded from complying development in NSW, and pulled into a discretionary or merit assessment almost everywhere else.
• Flood. A flood control lot or land in a flood planning area is generally excluded from the NSW CDC pathway; elsewhere a flood overlay brings floor-level, fill and materials controls a checklist cannot resolve.
• Bushfire. Bushfire-prone land is not automatically fatal, but severe ratings are — NSW excludes BAL-40 and BAL-FZ land from most complying development, and lower ratings still need a bushfire assessment.
• Sensitive and contaminated land. Coastal zones, mapped biodiversity or habitat land, acid sulfate soils and contaminated sites all knock out the fast track.
• Lot geometry. Undersized lots, insufficient frontage, and irregular or battle-axe shapes fail on the first line of the checklist.
• Design non-compliance. Height, setbacks, site coverage, landscaped area, private open space, overshadowing, privacy — miss one and eligibility is gone.
• Encumbrances and history. Easements or sewer mains under the footprint, restrictive covenants on title, and unapproved existing structures all commonly force a DA.

The trade-offs nobody mentions

The fast track is not automatically the better choice. Redesigning to hit every standard exactly can cost you more in lost floor area and a compromised layout than the DA would have cost in time and fees. If the site is unusual — a steep fall, a corner, a heritage neighbour, a big tree worth keeping — a merit assessment lets you argue for the design that actually suits the land.

There is also a durability point. A fast-track certificate issued for a site that was never eligible is exposed: if the underlying assumption was wrong, the certificate can be challenged well after work starts. A DA determined on the merits, with the constraints on the table, is a more robust piece of paper — though it does hand objectors a formal role, where a compliant fast-track proposal simply proceeds.

How to work out which pathway applies to you

• Confirm the zone and every overlay. Start here, not with a builder's brochure. You can check your address for overlays free in seconds.
• Find the code that applies to what you're building. Our plain-English summaries cover granny flat rules, deck rules and shed and garage rules state by state.
• Test the design against every numeric standard, not the ones you remember. Setbacks, height, site coverage, landscaped area and minimum lot size are the usual failures.
• Decide deliberately. If you fail one standard, either redesign to comply or accept the full application — and price both before you choose.
• Get advice on the marginal calls. Where eligibility is arguable, an hour with a planner is cheaper than a wasted certificate. You can talk to a planner about your site.

Frequently asked questions