A deck can transform how you use your home: somewhere to eat outside on summer evenings, a spot for morning coffee, a place for the kids to play. But a deck is also a structure that has to be safe for years, and building one in Victoria involves permits, registered builders, contracts and technical choices about materials. Deck Builders Melbourne is an independent guide that explains it all in plain language, using official Victorian and national sources.
Planning
Most decks need a building permit. The Victorian Building Authority says building or replacing a deck usually means applying for one and having the deck properly designed and documented. Consumer Affairs Victoria says builders must be registered with the Building and Plumbing Commission and use a major domestic building contract for work over $10,000. Our planning section covers permits, choosing a builder, quotes and contracts and designing your deck.
Materials
Timber or composite? Hardwood or treated pine? Which treatment class for posts near the ground? What changes in a bushfire prone area? Our materials section explains timber decking, composite decking, footings and framing and decks in bushfire areas.
Safety and care
Balustrades prevent falls, maintenance keeps a deck sound, and older decks deserve a careful look. Our safety and care section covers balustrades and stairs, oiling and maintenance, inspecting an older deck and building disputes.
Facts worth knowing
These come from official sources. Rules and thresholds change, so check the latest details.
- Most decks need a permit. The VBA says building or replacing a deck usually means applying for a building permit.
- Registration over $10,000. Consumer Affairs Victoria says builders must be registered with the BPC and use a major domestic building contract for work over $10,000.
- Insurance thresholds are changing. Consumer Affairs Victoria's guidance refers to Home Warranty insurance for work over $20,000 from 1 July 2026; before that, domestic building insurance applied above $16,000.
- Balustrades from 1 m. The NCC Housing Provisions require a barrier where a fall of 1 m or more is possible, at least 1 m high on decks.
- The 125 mm rule. Openings in barriers must not allow a 125 mm sphere through.
- BAL 12.5 minimum. The VBA says new homes in designated bushfire prone areas must be built to at least BAL 12.5.
- Free dispute help. The BPC offers free dispute resolution for eligible domestic building disputes.
Five mistakes to avoid
- Building without checking permits.
- Hiring an unregistered builder for work that needs registration.
- Accepting a vague quote that leaves out stairs, balustrades, demolition or permits.
- Using the wrong timber treatment for posts and framing near the ground.
- Neglecting maintenance until boards or framing rot.
Popular guides
- Do you need a permit for a deck?
- How to choose a deck builder
- Balustrades and stairs
- Timber decking
- Composite decking
- Oiling and maintaining a deck
For builders and suppliers
If you run a registered building business or supply decking products and would like to be considered for a clearly labelled listing, see feature your business. Listings never affect what our guides say.
About this site
This web address was once used by a single deck building business, which later lapsed. Deck Builders Melbourne is now a new, independent homeowner guide with new content, and isn't connected with the previous operator or any business with a similar name. We're not a builder, building surveyor or government agency. We write every guide in our own words, rely on official sources such as the Victorian Building Authority, Consumer Affairs Victoria, the Building and Plumbing Commission and the Australian Building Codes Board, and list sources on every page. Our guides are general information, not building, legal or engineering advice. Read more about us and our editorial policy.
