DA vs CDC Pathway in NSW: Which Approval Does Your Build Need?

What it is

In NSW two approval pathways sit under the Environmental Planning and Assessment Act 1979 (EP&A Act). A Development Application (DA) is lodged with the local council. A Complying Development Certificate (CDC) is issued by an accredited private certifier or the council where a project meets every numerical and qualitative standard in the State Environmental Planning Policy (Exempt and Complying Development Codes) 2008, commonly called the Codes SEPP.

The DA route is discretionary. Council planners weigh the proposal against the Local Environmental Plan (LEP), the Development Control Plan (DCP), section 4.15 matters for consideration, neighbour submissions and any state policy that applies. The CDC route is non-discretionary. If the design fits the Code, the determination must issue. If a single standard is missed, the CDC option falls away and the build defaults to a DA.

When each pathway applies

The Codes SEPP carves residential development into types. New single dwellings, alterations and additions, swimming pools, granny flats (secondary dwellings), sheds, carports and demolition each have a chapter with lot, setback, height, floor space and site coverage controls. A new two-storey home on a 600 sqm regular lot in a low-density zone often qualifies as complying development. The same home on a battle-axe block, in a heritage conservation area, on bushfire-prone land at BAL-40, in a flood storage area or with a non-standard zone usually cannot.

Triggers that push a project to DA

Some site features lock out complying development entirely. Local heritage items, draft heritage listings, environmentally sensitive land, foreshore areas, classified roads with a frontage trigger and certain coastal vulnerability areas all push the application to council. Variations to lot averages, setback dispensations or any reliance on clause 4.6 of the LEP also require a DA because the Codes SEPP allows no flexibility on its numerical standards.

How each pathway runs

A DA goes through neighbour notification, internal council referrals (engineering, heritage, environmental health, traffic) and external referrals where required (Sydney Water, Endeavour Energy, Rural Fire Service, Transport for NSW). The Environmental Planning and Assessment Regulation 2021 sets statutory clocks. Council can request additional information which stops the clock. Median DA assessment times for residential work commonly run between 70 and 120 days depending on the council and complexity. Section 8.2 review or a Land and Environment Court appeal sits behind any refusal.

A CDC has a target determination time of 20 days from a complete lodgement under the EP&A Regulation. The certifier checks the plans against the Code, not against subjective merit. No neighbour notification is needed for most CDC types because the policy already sets the controls, although certain residential types now require pre-lodgement notice to neighbours under recent amendments. Once issued the CDC operates as both planning consent and construction approval rolled into one.

What the builder needs to know

The pathway decision sits with the principal certifier and the designer before lodgement. A pre-purchase site check against the Codes SEPP is the cheapest insurance available. Search the planning portal layers for the site, confirm zone, lot size, bushfire, flood, heritage and acid sulfate soil status. If the site clears every gate, a CDC saves months. If a single layer fails, plan for a DA from day one rather than spending six weeks on a CDC that will be refused.

After approval

A DA grants development consent only. The builder still needs a Construction Certificate (CC) before any work starts. A CDC bundles planning and construction approval together, so once the CDC issues, work can start subject to the standard two-day notice to the principal certifier and Long Service Corporation levy payment. Both pathways require a final Occupation Certificate before the dwelling can be lived in.

Common traps

Lodging a CDC where the site has a recent heritage nomination is the most frequent reset. So is missing the difference between gross floor area in the LEP and floor area under the Codes SEPP, which calculate differently. Reliance on a draft DCP control rather than the gazetted Code is another. Side setback non-compliances of even 100 mm void the CDC pathway because the Code uses bright lines.

Cost and risk

A DA costs more in time and consultant fees because of the supporting documents, statement of environmental effects and BASIX certificate. A CDC compresses fees but transfers risk to the certifier who must refuse if any standard fails. Either way the construction phase sits under a registered builder, home building compensation cover where the work is over $20,000 and the standard NSW residential building contract framework.