Why This Matters Before You Start Designing
One of the biggest mistakes we see is people jumping into design without understanding the approval pathway.
In Sydney and the Central Coast, your project will generally fall under:
CDC (Complying Development Certificate)
DA (Development Application)
Choosing the wrong one early can cost you time and money.
What Is a CDC?
A CDC is a fast-tracked approval under the State Environmental Planning Policy (Housing) 2021.
If your design meets all the rules, you can:
Skip council
Get approval through a private certifier
Start building faster
What Is a DA?
A DA goes through council and allows more flexibility in design.
It’s typically needed when:
Your site doesn’t meet CDC controls
You want to push boundaries (setbacks, height, site coverage)
You’re dealing with heritage or constraints
Key Differences
CDC (2–4 weeks)
Strict rules
Lower cost
Pass/fail
DA Slower (2–6+ months)
Flexible design
Higher cost
Merit-based
When CDC Works Best
CDC is ideal for:
Granny flats
On-ground extensions
Standard renovations
Compliant new homes
When You’ll Need a DA
You’ll likely need a DA if:
Your lot is constrained
You’re over GFA limits
You want a more custom design outcome
The existing house already pushes planning controls
The Bettswhite Approach
We assess every job upfront:
Can it be done under CDC?
Is a DA actually the smarter move?
What gives you the best outcome long-term?
Thinking About a Project?
If you’re unsure whether your project suits CDC or DA, it’s worth figuring that out early.
Reach out and we’ll point you in the right direction.