Every summer for a few years now the drive up from Palmerston North to Mount Maunganui has ended the same way: my sister finds me a job before the jandals are even off. Last summer it was rebuilding her pergola after a nor’easter tore into it. I’m a DIY bloke by habit and tight with money by nature, so somewhere in all these trips I’ve picked up a fair bit about what actually holds up on the coast and what’s just a good-looking waste of cash. The Mount is nothing like home. Down on the Manawatū plains the wind is the enemy; up here it’s UV and salt air working together, and cyclone season keeps everyone honest. Here’s what I’ve learned, mostly by watching other people’s timber fall apart first.
What salt air does to a cheap deck
My sister’s neighbour put down a budget softwood deck the same summer we did hers. It looked lovely for about four months, then went grey and splintery well before the next one. That’s the Mount combo at work — high UV fades stain fast, and salt-laden air corrodes any fixing that isn’t properly rated, sometimes within a season or two.
A few things I now insist on when we’re buying materials up there:
- Stainless steel fixings, not galvanised, anywhere within a couple of kilometres of the beach. The extra spend is worth it.
- H3.2 treated timber as a minimum for anything outside, and H4 for posts going in the ground.
- A proper UV-stable decking oil, reapplied every year. Skip a year and you’ll be sanding.
Reckon on paying a bit more per square metre than you would inland, purely because the honest materials cost more. That’s just the price of living near the sea, and it’s cheaper than redoing the whole deck in three years.
Pricing the whole job, not just the deck
People say “outdoor living” like it’s one purchase, but it’s really a stack of separate trades and separate invoices. Here’s roughly what I’ve seen quoted around Mount Maunganui and Papamoa, all figures including GST:
| Item | Typical cost (incl. GST) |
|---|---|
| Basic timber deck, supplied and built | $350–$550 per m² |
| Louvre roof or pergola over a patio | $8,000–$20,000 |
| Outdoor kitchen bench with built-in barbecue | $4,000–$12,000 (higher if you go mad on it) |
| Courtyard paving, laid | $120–$250 per m² |
My advice, as a fella who watches his dollars, is to build the bones first. Get the deck down and a solid roof overhead, then save toward the outdoor kitchen for next summer. Staging it spreads the cost and lets you see how you actually use the space before you commit the big money on a barbecue bench or a full louvre roof.
Building for the wind, not the brochure photo
Those glossy outdoor-living photos are always shot on a still, golden evening. Real life at the Mount is salty gusts and a sun that’ll cook you by 11am. When we rebuilt my sister’s pergola, we angled the seating away from the prevailing nor’easter and put a solid section of wall on the exposed side instead of glass everywhere. It made the space usable on far more days of the year than the original layout ever was.
Shade matters more than people think. A retractable awning or a louvre roof earns its keep because midday sun up there is no joke, whether you’re on an older section right by the beach or a newer build back in Papamoa. If you’re planting for shelter and greenery around the deck too, get the watering sorted early — I’ve written more on that in our guide to irrigation basics for Bay of Plenty gardens.
The consent rule I check before buying timber
A lot of decks and small structures fall under the exempt work rules, but not all of them, and this is where people get caught out. Generally a deck under 1.5 metres off the ground can go up without consent, but once you’re higher, or you’re adding a roof structure, the rules change and boundary distances start to matter too. It’s not worth guessing — the Tauranga City Council website sets out what needs consent and what doesn’t, and a quick read before you start can save you a very expensive teardown later.
I always ring the council before ordering materials now. Five minutes on the phone beats pulling something down after the timber’s already cut.
Questions I get asked about building outdoors at the Mount
Do I need building consent for a deck at Mount Maunganui or Papamoa? Usually not if it sits under 1.5 metres above the ground and meets the exemption rules, but decks higher than that, or ones with a roof over them, often do need one. Check with Tauranga City Council before you buy timber.
Should you repair a storm-damaged pergola or just rebuild it? If the posts and framing checked out sound after a nor’easter, spot repairs and new fixings can be enough — that’s what we did with my sister’s. But once salt has been into the joints for a while, or the original build used galvanised fixings and untreated timber, a full rebuild with H3.2/H4 timber and stainless fittings is cheaper long-term than patching a job that was undercooked to start with.
How much does an outdoor living area cost in Mount Maunganui? A basic deck runs about $350 to $550 per square metre, a louvre roof or pergola $8,000 to $20,000, and an outdoor kitchen $4,000 to $12,000, all including GST. Paving a courtyard adds $120 to $250 per square metre laid. Building it in stages — deck and roof first, kitchen later — spreads the cost.
What’s the best decking timber for a coastal Bay of Plenty section? H3.2 treated timber as a minimum, H4 for anything going into the ground, stainless steel fixings near the sea, and a UV-stable oil reapplied every year. Cheap softwood and galvanised nails don’t last in this much salt and sun. A UV-stable finish only lasts if it goes on clean and dry, and a Whangarei painting contractor says the same about anything exposed on a Northland coast.