Do I need council approval for a deck?

Approval is the question that stops a lot of deck plans before they start, because the answer feels like a mystery. It is not. The path your deck falls under comes down to a few plain things: the height, the size, and your council. Here is the straight version, so you know before anyone digs a footing.

The short answer

In NSW a deck falls into one of three paths. Many low, small decks fit the exempt-development rules and need no approval at all. A larger or elevated deck usually needs a Complying Development Certificate, a faster private-certifier path. A bigger or trickier build, or one that does not fit the rules, needs a Development Application through the council. The height and the size decide which one is yours.

What pushes a deck up the path

• Height. A low, ground-hugging deck often stays exempt. Once it is up off the ground, it usually moves into a CDC, and the higher it gets the more is required.
• Size and floor area. A small platform is more likely to be exempt. A large deck off the back of the house is more likely to need a CDC or a DA.
• A roof or pergola over it. Adding a cover usually pushes the job past the exempt rules, because it changes the structure and the footprint.
• Setbacks and stormwater. How close the deck sits to the boundary, and where the water goes, can move a deck from exempt into a CDC or DA.

The deck that gets pulled up later is the one quoted as a lump sum with no word on approval. The path is not the hard part. Being told which one is yours, before the build, is.

Why it has to be on the quote

Approval is not a detail to sort out halfway through. It changes the timeline and sometimes the cost, and an elevated build may also need an engineer's certificate for the footings and posts. A quote that names the path, exempt, a CDC, or a DA, is one you can plan around. A quote that stays silent on it is where the surprise hides.

How we handle approval at Deckline

We tell you on the quote exactly which path your deck falls under, rather than leaving you to find out later. We read the height, the size and the setbacks on the free measure, factor the approval into the price and the timeline, and prepare what is needed. You are never left to work the rules out yourself after we have started. This is general guidance, not council advice, and the detail varies a little by council and by site, which is why we confirm your path on the measure.