Every Sydney renovation reaches the same fork in the road: how does this project get approved? In New South Wales there are two main pathways, the Development Application and the Complying Development Certificate, and choosing the right one can save months of waiting. Here is the plain English version we give our clients.
The fast lane: CDC
A Complying Development Certificate is a combined planning and construction approval issued when your proposal meets a set of predetermined standards in the State Environmental Planning Policy, known as the Codes SEPP. The assessment is done against a checklist rather than on opinion, and it can be issued by a registered private certifier or by council. The appeal is speed and certainty: a complying development application is typically determined in a matter of weeks, and because the standards are numeric, you know before you lodge whether you comply. The catch is that the standards are strict and the gate is narrow. The property generally cannot be in a heritage conservation area or be a heritage item, the lot size, setbacks, height, site coverage and landscaping must all meet the published numbers exactly, and constraints such as bushfire and flood mapping can narrow eligibility furthe
The considered lane: DA
A Development Application is assessed on merit by your local council against its planning controls. Neighbours are notified, the design is weighed as a whole, and the council has discretion. That discretion cuts both ways: a DA allows design moves a checklist would never permit, but it takes longer, commonly running months rather than weeks, and timeframes vary significantly between councils. For much of our work a DA is simply the reality. Large parts of the Eastern Suburbs and the harbour peninsulas sit within heritage conservation areas, where CDC is off the table and the design conversation with council is part of the craft. The right pathway is a design decision, not a paperwork decision, and it should be made in the first month, not the last.
How we decide
At the studio, the pathway question is answered during our documentation stage, and often sketched in the very first conversation. We look at three things: whether the site is eligible for complying development at all, whether the design you actually want fits within the CDC numbers, and whether the time saved justifies any design compromise. Sometimes the answer is a hybrid: the pool under one approval, the house under anot
Honest timeframes
As a general guide in 2026: a CDC is commonly issued within a few weeks of lodging a complete application. A straightforward DA often runs three to six months from lodgement to determination, and complex or contested applications can run longer. These vary by council and by the quality of the application, which is why complete, well resolved documentation is the cheapest time saver in the whole project.
What this means for you
If you are early in your planning, two practical steps: first, find out whether your property sits in a heritage conservation area, which your council's online mapping will tell you; second, get design and planning advice before you fall in love with a scheme. We manage the approval pathway, the drawings and the consultants as one package in our process, so the question is settled early and the project never stalls at the gate.