Do you need council approval to demolish a house in NSW?
Yes, you need council approval to demolish a house in NSW, because local planning rules allow demolition only with consent. That approval comes as a development application to council or a complying development certificate under the State's Demolition Code. In a knockdown rebuild it is often lodged together with the approval for the new home.
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Why demolishing a house needs approval
Sydney councils' Local Environmental Plans (LEPs) carry a standard clause saying a building may be demolished only with development consent. A note to that clause explains that work listed as exempt or complying development under the State's Codes SEPP can go ahead through those routes instead.
The exempt route is narrow because it only covers structures small enough to have been built without approval, such as an old shed or carport. A whole house never fits, so council approval to demolish a house in NSW comes down to a choice between a complying development certificate (CDC) and a development application (DA).
Demolishing a house through a CDC
The State's Demolition Code allows a house, a granny flat, a swimming pool and outbuildings to be demolished as complying development. A CDC is assessed against fixed standards rather than a planner's judgement. Your council or a registered certifier can issue it, which usually makes it the faster pathway.
The certificate carries conditions that apply on site while the work is under way. Your neighbours must also be notified before demolition begins. A knockdown rebuild can pair a CDC for demolition with a CDC for the new home, although that only works when both fit the codes.
When demolition needs a development application
Heritage is the main reason a demolition has to go to council as a DA. A CDC cannot be issued for a listed heritage item, whether the listing sits on the State Heritage Register or in the council's own LEP.
In a heritage conservation area the Demolition Code only covers detached outbuildings and internal elements of the house. Demolishing the house itself there means a DA, where council weighs what the existing home contributes to the street.
A DA is also the usual path when the new home goes beyond the codes, because council can assess the demolition and the new design in one application. Our guide to choosing between a DA and a CDC explains how the two pathways differ.
Other rules that apply before demolition starts
Planning approval is only one part of clearing a site. SafeWork NSW treats demolition as high risk construction work, so the contractor needs the right licence and must check the building for asbestos first.
All asbestos has to be removed before the structure comes down. A licensed removalist must handle friable asbestos and any bonded asbestos over 10 m², notifying SafeWork NSW at least five calendar days before starting.
Gas, power, water and phone services are disconnected before work begins. Removing a significant tree or placing hoarding on the footpath can also need separate council permits.
How we sequence demolition in a knockdown rebuild
We treat demolition as one decision within the whole rebuild, so the approval pathway is settled while the new home is being designed. We resolve the program, site logistics and demolition planning before construction, so the work on site follows a sequence already agreed with you.
If you are still weighing up the budget, our knockdown rebuild cost guide sets out demolition alongside every other cost of replacing a home.
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