A neighbour of mine in Miramar pulled down an old carport last summer, poured a slab, and put up a tidy sleepout for the grandkids to stay in when they visit. Six months later he tried to sell the house and the whole thing surfaced in the LIM report as unconsented work. The sale nearly fell over. He’s a careful, law-abiding bloke — he just didn’t know a sleepout needed a building consent.
I spend a fair bit of my working life around Wellington sorting out exactly this kind of mess for homeowners, and the pattern is always the same: the rules on consents aren’t secret, they’re just scattered across a few different documents and two different councils, and the cost of guessing wrong is high. So here’s the plain-English version of what you actually need to know before you start a project.
Building consent or resource consent — they’re not the same thing
Two separate things can trip you up here, and people muddle them constantly. A building consent is about whether your structure is safe and built to the Building Code. A resource consent is about whether you’re allowed to do it on your land under the district plan — height, boundaries, heritage overlays, earthworks. Some jobs need one, some need both, some need neither. In Wellington, building consents are handled by Wellington City Council, while the regional council, Greater Wellington, deals with some of the environmental side.
My rule of thumb: if you’re changing the structure, plumbing, or drainage of a building, assume you need a building consent until you’ve confirmed otherwise. Painting, re-carpeting, swapping a benchtop — none of that needs one. It’s the grey zone in between where people get caught.
What Schedule 1 actually exempts
The Building Act carries a list of exempt work known as Schedule 1, and it’s genuinely useful once you know how to read it. The trouble is always in the detail, not the headline:
- A single-storey detached building under 30 square metres, built with certain materials, is commonly exempt.
- Most decks under 1.5 metres high don’t need a consent — but that height is measured at the highest point above ground, so a deck that looks low from the house can cross the line fast on a sloping Miramar or Kilbirnie section.
- Garden sheds and many fences under 2 metres are usually exempt.
- Plumbing and drainage connected to an exempt structure will often still need consent even when the structure itself doesn’t.
The official plain-language guide at Building Performance lays out Schedule 1 properly, and I’d read it before assuming any project is in the clear.
Wellington adds its own wrinkles on top of that. If your property sits in a heritage area, has a character overlay, or is in a fault or slope hazard zone, work that would be exempt anywhere else can suddenly need extra sign-off. Miramar and the wider eastern suburbs — Kilbirnie, Seatoun, that pocket of the city — have plenty of older housing stock, a lot of it villas and bungalows going back to the early 1900s through the 1930s, where character rules genuinely bite.
Getting a consent through the council: what actually happens
If you do need a building consent, the process runs roughly like this:
| Step | What it involves |
|---|---|
| Prepare the application | Plans, specifications, often a Producer Statement from an engineer — most homeowners use a designer or architect here |
| Lodge and pay | Typical residential consent fees in Wellington run about $2,000–$6,000 incl. GST, plus levies on higher-value work |
| Statutory processing time | 20 working days — but the clock stops every time the council sends a Request for Information |
| Real-world timeline | Usually 6 to 12 weeks once RFIs are accounted for |
| Sign-off | Staged inspections, then a Code Compliance Certificate (CCC) once the build passes |
That CCC is the piece of paper that protects you at resale. It’s the thing my neighbour didn’t have.
What skipping it actually costs you
I get the temptation — consents cost money and time, and a small job feels like overkill for the paperwork involved. But unconsented work follows the house forever. It shows up on the LIM, it spooks buyers, it can void insurance if something goes wrong down the track, and the council can require a Certificate of Acceptance after the fact, which is a more expensive and more painful process than doing it properly up front. My neighbour eventually got his Certificate of Acceptance sorted, but between the reports and the remedial work it cost him more than the original consent would have.
If you’re weighing up several outdoor jobs at once — a deck, a fence, a retaining wall — it’s worth working through them together rather than one at a time, since a lot of the same exemption thresholds apply across all of them. I’ve gone into more detail on that in a separate piece on what outdoor work needs consent in New Zealand.
Questions I get asked about Wellington consents
Do I need a building consent for a deck in Wellington? Usually only once it’s more than 1.5 metres above the ground at its highest point. Because that height is measured at the highest point, not an average, a deck on a sloping Wellington section can cross that line even when it looks low from the house. Check before you build, not after.
How much does a building consent cost in Wellington? For a typical residential project, Wellington City Council fees commonly run $2,000 to $6,000 including GST, with additional levies on higher-value work. Design and engineering costs sit on top of that.
What happens if I build without consent? It shows up on your LIM report, complicates insurance and resale, and can force you into a Certificate of Acceptance later — a process that’s typically slower and pricier than getting the consent would have been in the first place.
Do heritage or character-zone properties need extra steps? Often, yes. A lot of Wellington’s eastern suburbs — Miramar, Kilbirnie, Seatoun — carry character overlays over villas and bungalows from the early 1900s to the 1930s, and work that’s exempt elsewhere in the city can need additional sign-off there. Check your property’s district plan zoning before assuming Schedule 1 covers you. Character overlays often protect the trees as well as the buildings, so a Wellington arborist is worth a call before planning anything that changes a mature canopy.