Do you need approval to build a deck in NSW?

The Planning Portal groups balconies, decks, patios, pergolas, terraces and verandahs together, and lists what such an addition must not do and what it must meet to be exempt from planning consent. Read it as a span table: a deck has to pass every row, and the rest of the State Policy’s list, to be exempt.

The building line and existing ground level are defined terms; the Portal links each one to its legal definition. The zone your lot is in decides which boundary distance applies, so it is worth finding before anything else (see your lot, below).

An exempt deck still has rules to meet. The Planning Portal says: “All works must be structurally adequate, installed in accordance with manufacturer’s specifications and comply with the Building Code of Australia (BCA).” That includes the code’s rules on barriers, covered in the balustrade guide.

• Public land and roads. Anything built on or over public land or a road needs its own approval from the local council or Transport for NSW.
• Trees. Before removing or pruning any existing trees or vegetation, the Portal says to check with your council whether you need approval.
• Places where exempt development generally can’t happen. Land or a building on the State Heritage Register, or under an interim heritage order; critical habitat of an endangered species, population or ecological community; and a wilderness area.
• Older buildings. The Portal’s exempt development page says: “Buildings constructed before 1990 may contain asbestos. If you are unsure of when your building was constructed, you should contact a licensed asbestos assessor before carrying out any work.” The national asbestos agency says it is “not recommended that you handle or remove asbestos yourself”, and that a licensed asbestos removalist, with the training, insurance and equipment to prevent or minimise exposure, is a much safer and easier choice. It says to think about asbestos before starting any repair, maintenance or improvement job, even one as small as drilling a hole in a wall for a shelf. Asbestos material that is in good condition should be left alone, not disturbed or damaged. If it is broken or weathered, or if renovation or maintenance work is likely to disturb or damage it, get professional help to remove it. Asbestos fibres are dangerous when disturbed: the NSW planning department says all asbestos-containing materials can be dangerous if damaged, disturbed or deteriorating. The agency says to avoid disturbing or releasing asbestos fibres, and never to clean asbestos material with high-pressure water or anything abrasive, such as scrubbing, sanding or grinding. It also says never dry-sweep asbestos dust with a broom or brush, never cut, grind, sand or drill asbestos materials with high-speed power tools, and never clean them with high-pressure water or compressed air. The NSW planning department lists what must not be done to material that may contain asbestos, because it releases fibres: cutting, drilling, sanding, scraping, scrubbing and water-blasting. In NSW, asbestos waste cannot go into demolition waste skip bins or kerbside bins, only to a landfill licensed to accept it, and the NSW EPA’s household asbestos page says it is illegal to put it in an uncovered skip, or in a skip not approved to hold asbestos.

Several rows depend on facts about your lot, such as its zone and whether it is bush fire prone. These are the official places to look.

1. Zone and planning constraints. The Planning Portal says you can enter your address in its Spatial Viewer to see what planning constraints and zoning rules affect your property.
2. Bush fire prone land. The NSW Rural Fire Service has an online tool for checking whether land is mapped as bush fire prone. It says the result is valid only for the day you search, and that you can confirm it on the Section 10.7 Planning Certificate from your council.
3. Covenants. The Portal notes that complying development does not override private covenants or similar legal instruments, giving the example of a covenant that requires a specific construction material.

Complying development

Complying development is a fast-tracked process that combines planning and construction approval. It is determined by the council or an accredited certifier without a full development application, if the proposal meets specific development standards, and the Portal says approvals can be issued in as little as 20 days.

For houses, the Housing Code allows alterations and additions and attached development, including garages and balconies, as complying development where the proposal meets its standards. It applies in zones R1, R2, R3, R4 and RU5; development in zones R5, RU1, RU2, RU3, RU4 and RU6 uses the Rural Housing Code instead.

On bush fire prone land, the RFS says complying development can be undertaken on lower risk land up to and including BAL-29, and is not permitted at BAL-40 or BAL-FZ, where a development application is required. The bush fire guide explains those levels.

A development application

Local development needs approval through a development application, lodged with the local council. The Portal lists what the application must include: a description of the development, its estimated cost, a plan of the land, a sketch of the development, and an environmental assessment, such as a statement of environmental effects.

In NSW, an owner-builder permit is needed if you will do or supervise work worth more than $10,000 on your own home and have not contracted a licensed builder to supervise it. The page defines owner-builder work as work on a single dwelling-house, dual occupancy or secondary dwelling that requires development consent or is complying development. A permit is not needed when the work does not require a development application or complying development certificate, when its value including labour and materials does not exceed $10,000, or when you have contracted a licensed builder.

NSW Government says an owner-builder carries the same responsibility for the building work as a fully licensed builder would. Those dollar thresholds are as at October 2026; check the current page before relying on them.