Council Approvals Explained: DA vs CDC for Sydney Home Builds (2026)
The Short Answer
A CDC is a fast-track, combined planning and construction approval for straightforward builds that fully meet NSW state planning rules. It can be issued by a private certifier or council in as little as 10–20 business days. A DA is a formal application to your local council, used for larger, more complex or non-standard projects, and typically takes around 8–20+ weeks. If your project meets every state standard, a CDC is usually faster and cheaper. If it doesn’t, you’ll need a DA.
What is a CDC (Complying Development Certificate)?
A CDC is a combined planning and building approval for projects that comply with the State Environmental Planning Policy (Exempt and Complying Development Codes) – known as the Codes SEPP. Because the design already meets a fixed set of state-wide standards, it doesn’t need to go through council’s full assessment or neighbour notification, which is why it’s so much faster.
CDC at a glance
• Issued by a private accredited certifier or council
• Typically 10–20 business days from lodgement
• Generally lower cost – often in the range of $4,000–$8,000 all-in including certifier fees
• Requires strict compliance: height, setbacks, floor space, lot size and other Codes SEPP standards must all be met
• No merit assessment or neighbour objection process
What is a DA (Development Application)?
A DA is a formal request to your local council for permission to build. It’s assessed under your council’s Local Environmental Plan (LEP) and Development Control Plan (DCP), and it allows for design variation and merit-based assessment that a CDC doesn’t. That flexibility comes at the cost of time and paperwork.
DA at a glance
- Assessed by your local council
- Typically 8–20+ weeks; complex or contested DAs can take 6–9 months
- Higher cost – council and consultant fees commonly run from several thousand dollars up to $15,000+ depending on complexity
- Usually involves neighbour notification and public submissions
- Allows more design freedom and merit-based consideration
DA vs CDC side by side
Factor | CDC | DA |
Assessed by | Private certifier or council | Local council |
Typical timeframe | 10–20 business days | 8–20+ weeks |
Typical cost | ~$4,000–$8,000 | ~$5,000–$15,000+ |
Design flexibility | Must meet strict standards | Merit-based, more flexible |
Neighbour notification | No | Usually yes |
Best for | Standard, compliant builds | Complex or non-standard sites |
What pushes a project from CDC to DA?
Even a well-designed home can be forced down the DA path by the site itself. Common triggers include:
- Heritage listings or heritage conservation areas
- Flood-prone or bushfire-prone land (higher bushfire attack levels)
- Blocks that don’t meet the minimum lot size or width in your council’s LEP
- Designs that exceed height, setback or floor-space standards
- Battle-axe or irregularly shaped lots, and some second-storey additions
This is why the smartest first step is to check what applies to your land before you lock in a design – usually via a Section 10.7 planning certificate. Discovering a CDC won’t work after the design is finished means costly redesign or a switch to a DA.
Which pathway will my build need?
As a rough guide: a straightforward new home or knockdown rebuild on a standard, unencumbered block often qualifies for a CDC, while anything on a sensitive site, or any design that pushes the standards, will need a DA. Duplexes and dual occupancies can go either way depending on the site and the design. The only way to be certain is a proper site and planning check.
At Buildrite Sydney, we guide clients through the right approval pathway as part of every project – assessing your site early so you know whether you’re on the fast CDC track or the DA path before you commit. If you’re planning a custom home, knockdown rebuild or duplex, get in touch and we’ll help you map it out.
Frequently Asked Questions
Is a CDC always cheaper than a DA?
Usually, yes. CDC certifier fees are generally lower than combined council and consultant DA fees, and the faster timeline reduces holding costs. But a CDC is only an option if your project fully complies with the Codes SEPP.
How long does a DA take in Sydney?
Most residential DAs take around 8–20 weeks, though complex or contested applications can run 6–9 months. Timeframes vary significantly between councils.
Can I switch from a DA to a CDC to save time?
Only if your design can be adjusted to fully meet the Codes SEPP standards. Often it’s cheaper and faster to check the CDC pathway first and design to comply, rather than redesign later.
Do I need a BASIX certificate either way?
Yes. A BASIX certificate is required before lodging either a DA or a CDC for new homes and major renovations in NSW.
Who works out which approval I need?
Your builder, certifier or planner assesses this against your site’s planning certificate and the proposed design. At Buildrite, we handle this as part of the early planning stage of your build.