Decks are the most-quoted job on Connect Coromandel, so we see a lot of prices. Here's what they look like in 2026, what pushes them up or down, and the two things that catch people out: consents and salt air.
These are ballparks from real quotes, not a price list. Every site is different — a flat section in Whangamatā and a sloping one above Hahei are two different jobs.
Ballpark prices per square metre (supply and build, excl. GST)
Most decks on the Coromandel land between these numbers once you include framing, fixings, labour and a basic handrail where it's needed:
- Treated pine decking: roughly $350–$500 per m²
- Kwila or vitex hardwood: roughly $500–$750 per m²
- Composite (Trex, ModWood and the like): roughly $600–$850 per m²
- Add $150–$300 per lineal metre for balustrade, more for glass
- Add for stairs, built-in seats, privacy screens and anything over 1 m off the ground
What moves the price
The decking board is the smallest part of it. The things that change the number most:
- Height off the ground — over 1.5 m means bigger posts, bracing, a balustrade and usually a consent.
- Ground — sand at the beach is easy; clay and rock up the hill means more digging or concrete.
- Access — if a truck can't get close, every board and bag of concrete gets carried.
- Fixings — stainless everywhere near the coast. It costs more and it's not optional; galvanised screws rust out in a few summers of salt air.
- Old deck removal — pulling out a rotten deck and dumping it is often $1,500–$3,000 on its own.
Do you need a building consent?
Under the Building Act, a deck less than 1.5 m above the ground generally doesn't need a consent. Over 1.5 m it does, and so does anything attached to the house that affects weathertightness. Thames-Coromandel District Council handles consents locally and the exemption rules have a few wrinkles, so ask before you assume.
A good builder will tell you up front whether your deck needs one and price the paperwork in. If a quote is noticeably cheaper than the others, check whether that's why.
Kwila, pine or composite?
Pine is cheapest and fine if you'll stain it every couple of years. Kwila looks great and lasts, but it bleeds tannin onto concrete for the first year and needs oiling. Composite costs the most up front and then costs nothing — for a bach you only see in summer, that's often the right call.
Whatever you choose, ask for the board profile and the fixing spec in writing so you can compare quotes like for like.
Getting quotes you can compare
The reason deck quotes vary so wildly is that every builder quotes a slightly different deck. On Connect we write one scope with you first — size, height, material, balustrade, stairs, removal — and every tradie prices that. Post it with a couple of photos and you'll have comparable quotes from vetted local builders within 72 hours, free, no obligation.
Want real numbers for your job?
Post it once, free. Vetted local tradies quote it within 72 hours and there's no obligation.
Post a job — freeQuestions
How long does a deck take to build?
A straightforward 30 m² deck is usually a week on site once materials are in. Consented decks add the council's processing time first — allow 20 working days.
Can I get a deck built at my bach while I'm not there?
Yes. Connect coordinates access with the tradie and you get photos as it goes.
Is winter a cheaper time to build?
Often, yes. Coromandel builders are flat out from October to Easter; May to August is when you'll get the quickest start.
Prices in this guide are ballparks from quotes we've seen, excluding GST unless stated, and will vary by site and season. They aren't a quote.