A deck is one of the most popular ways to make the most of Brisbane's outdoor lifestyle. If you're planning one, you'll want to know what it will cost. The honest answer is that it depends on the size, height, materials and design, as well as your block and whether you need approvals. Two decks of a similar size can be priced very differently.
This guide explains what affects the cost of a deck in Brisbane, the approval basics from Brisbane City Council, and the Queensland licence and payment rules worth checking. It's a Queensland-specific guide, so if you're elsewhere, check your own state and council rules.
What affects the price
Size and shape
Bigger decks need more materials and labour. Simple rectangles are usually quicker to build than decks with angles, curves, multiple levels or built-in steps and seating.
Height off the ground
A low deck close to the ground is generally simpler than an elevated deck. Higher decks need stronger posts and bracing, balustrades and stairs, and may need engineering and approvals.
Materials
Decking boards come in hardwood, treated pine and composite options, among others. Each has a different price, look, durability and maintenance needs. The subframe, fixings and balustrade materials also affect the price. Ask each quote to name the exact products.
Roofing and extras
Adding a roof turns a deck into a bigger project and can change the approvals needed. Lighting, power points, fans, privacy screens, built-in seating and stairs all add to the scope.
Site conditions
Sloping blocks, poor soil, existing concrete, tree roots and tight access can all add time and cost. Removing an old deck is extra work too.
Approvals and professional fees
If your deck needs building approval, you may need to pay for drawings, engineering and a private building certifier. If it needs planning approval, there may be council fees. Ask whether these are included in the builder's price.
Do you need approval in Brisbane?
Brisbane City Council's page on deck approvals says you don't need building approval for a deck if all of these apply:
- the plan area is no more than 10 square metres
- it's no more than one metre above natural ground
- it's not roofed
- no side is longer than five metres
- it won't affect the structural integrity of existing buildings, retaining walls or other structures
- it won't alter an existing pool enclosure or pool fence
If your deck doesn't meet all of these, you'll need building approval, which is arranged through a licensed building certifier. The council also notes you may need planning approval if your property is in an overlay, such as the Traditional building character overlay, or a neighbourhood plan area. Even when approval isn't needed, the work must still comply with the relevant building codes.
Other councils have their own rules, so if you're outside Brisbane City, check with your local council.
Check the QBCC licence
In Queensland, the QBCC says individuals and companies must hold a QBCC licence to carry out building work valued over $3,300. Most decks will be above that value. You can check a licence on the QBCC online register. Make sure the licence covers the type of work and the name matches the business on your quote.
You can also check the business's ABN on ABN Lookup and ask whether they hold public liability insurance.
Deposits and progress payments
Queensland law limits deposits. The QBCC's page on deposits and progress payments says the maximum deposit is 10% for works valued from $3,301 to $19,999, and 5% for works over $20,000, with some exceptions for off-site prefabrication. Progress payments must be relative to the amount of work completed. Check the official page before you pay anything, as rules can change.
How to get quotes you can compare
Give each builder or carpenter the same brief:
- a sketch with approximate size, shape and height
- photos of the area, including slope and access
- your preferred decking and balustrade materials
- whether you want a roof, steps, lighting or other extras
- whether they should handle approvals and certification
- your timing
Ask each quote to list materials, labour, approvals, demolition and removal of any old deck, finishing (such as oiling), and GST. The QBCC has more tips on seeking and comparing quotes.
Questions to ask your builder
- Have you built decks like this before, and can I see examples?
- Will my deck need building or planning approval, and who will arrange it?
- What decking product and fixings are included?
- What finish or maintenance will the deck need?
- How long will the job take, and what could delay it?
Looking after your deck
Timber decks usually need regular cleaning and re-oiling or sealing, while composite decks have their own care needs. Ask your builder what's recommended for the product you choose.
Ready to compare local trades? Browse carpenters in Brisbane or start at our carpenters page.
Find local carpenters near you
Search free by suburb or postcode, compare listings and contact businesses directly.
Are you a tradie? List your business on Find My Tradie →
Find carpenters in your area
Frequently asked questions
Do I need approval to build a deck in Brisbane?
Brisbane City Council says small, low, unroofed decks that meet set conditions don't need building approval. Larger, higher or roofed decks generally do. You may also need planning approval in some overlays.
Does my deck builder need a QBCC licence?
The QBCC says building work above its value threshold needs a QBCC licence. Most decks will be above it, so check the licence on the QBCC register.
Which decking material is best?
It depends on your budget, look and maintenance preferences. Ask your builder to explain the pros and cons of hardwood, treated pine and composite.
How many quotes should I get?
Two or three detailed written quotes for the same design and materials will give you a good comparison.
This guide is general information only, not legal or financial advice. Rules change, so check the official sources linked above for your state.