What can I build without building consent in New Zealand?

Schedule 1 of the Building Act sets out low-risk building work that does not need a building consent when every condition for that exemption is met. MBIE groups the list on its work you can do without a building consent page and publishes technical requirements for exempt building work. Palmerston North City Council also summarises exempt building work for local applicants. If your project sits outside the exact wording of an exemption, you need a building consent. There is no informal “close enough” category.

The categories people ask about most often are small detached outbuildings, low decks and platforms, fences below the Schedule 1 height limits, retaining walls within the height and surcharge limits, some unroofed outdoor structures, and limited repair or maintenance work. Exact floor areas, heights, materials, and when an LBP or engineer must be involved change by clause. Always read the current MBIE clause text for your project type rather than relying on a summary article (including this one).

Two rules sit underneath every exemption. First, exempt work must still comply with the Building Code. Second, building consent exemption does not remove district plan, resource consent, or other legal obligations. For the wider consent framework, see what building consent is in NZ and MBIE's check if you need consents hub.

From early 2026, eligible new single-storey standalone dwellings up to 70 square metres can be built without a building consent under Schedule 1A, provided the design stays simple, the Building Code is met, licensed building professionals carry out or supervise the work, and you notify council before start and after completion. MBIE calls this the granny flats exemption. Councils may use different labels for the same pathway. Rangitīkei District Council, for example, talks about a small standalone dwelling. The legal test is the exemption conditions, not the marketing name.

A project information memorandum (PIM) is part of the process before construction starts. The PIM is not a building consent approval. It is council information about the site, hazards, services, and related obligations, and it is one of the checkpoints that keeps the exemption lawful. Incomplete conditions do not create a partial exemption. If you fall outside the rules mid-design or mid-build, the work generally needs a full building consent path instead.

The exemption is also deliberately limited. Features such as a solid fuel heater sit outside the simple granny flat pathway in MBIE's guidance, and heavier or more complex construction (including some panelised approaches) can push you toward a consented design. That is not a failure of the exemption. It is the exemption doing its job: keeping the no-consent route for simple, tightly scoped dwellings.

The most common mistake I see is treating the Building Act exemption as the whole answer. Clients focus on Schedule 1 or the granny flat rules and miss the district plan. Building consent and resource consent are different systems. I unpack that split in building consent vs resource consent and in what resource consent is in NZ. National settings for minor residential units can remove resource consent in some cases, but site overlays, setbacks, coverage, hazards, services, and plan wording still catch projects. If any planning condition fails, you can be exempt from building consent and still blocked on land use.

Which plan applies depends on where you build. Palmerston North uses the Palmerston North District Plan. Feilding and surrounding Manawatū District Council areas use the Manawatū District Plan. Whanganui has its own district plan. Marton sits under the Rangitīkei District Plan. Paraparaumu sits under the Kāpiti Coast District Plan. Same exemption question, different planning rulebook. That is why a national “cabin under granny flat rules” assumption falls apart once the site is on the table.

I have had clients who wanted a cabin under the granny flat pathway and asked me to confirm they were fully inside the rules. Once we checked the district plan and the site, resource consent was still in play, and the proposed building site had complex constraints that needed resolving before any serious design started. What looked like a simple exempt build became district plan and site due diligence first. Some people walk away at that point because the paperwork exceeds the dream they Googled. Others treat it as the moment to design properly for what they actually need.

Exemptions and consents are not always an either-or choice. One Manawatū client wanted a simple two-bedroom dwelling that fitted the granny flat exemption but also wanted a fireplace. A solid fuel heater is not part of that simple exemption pathway. The workable sequence was to build the dwelling under the exemption, finish and close that pathway properly, then apply for a building consent to add the fireplace.

If you take that route, plan the later consent work into the first build. Structure in the right place, fixings behind linings, and clearances thought through early are cheap decisions on day one and expensive regrets later. There is no point paying twice to rebuild fabric you could have prepared the first time. This is staging and buildability, not a loophole, and it only works when each stage honestly meets its own legal pathway.

That sequencing is exactly the kind of predesign conversation we have before pencil hits paper. If you are heading toward consented drawings rather than an exemption, our Manawatū building consent drawings service is set up for that documentation path.

Exemptions exist for simple projects within set rules. They do not suit every job, even when you can squeeze inside the letter of the exemption. If the brief needs a heater, more floor area, a more complex structure, hazard mitigation, or a layout that keeps bending the conditions, the consented route is usually cleaner. MBIE's exempt building work hub and granny flat guidance both point people toward consent when the design stops being simple.

There is also a design upside. Once clients accept that consent is required, many stop compromising to stay exempt and instead design for the brief: the rooms they need, the orientation that works, the durability and detailing that will still make sense at resale. The scope of exempt work is refined for a reason. Stretching it to avoid paperwork often produces a building that does not do the job.

My stance is blunt. The risk of building without a consent you should have obtained is not worth the reward. Enforcement, insurance, resale, and the cost of undoing illegal work sit on the owner. If you are unsure, assume consent until an LBP Design Class designer or your council has confirmed otherwise against the current Act text and the district plan for that site. For a full home or extension brief, start with custom home design or home extension design rather than hunting for an exemption first.

Start with three checks in parallel. First, match the proposed work to the current Schedule 1 or Schedule 1A conditions on building.govt.nz, not to a neighbour's story or a social media summary. Second, check the district plan and any overlays for that exact property. Third, look at site realities: access, services, hazards, setbacks, and whether the building can actually sit where you imagine it.

For granny flat pathway work, expect a PIM and the notice and completion paperwork MBIE requires. For ordinary Schedule 1 work, still confirm Building Code compliance and planning status. If any check is ambiguous, ask your council's building and planning teams the same question in writing, or bring an LBP Design Class designer in early so the pathway decision is made before money is spent on the wrong drawings.

If the outcome is “you need consent,” that is not a dead end. It is usually the start of a clearer project. Get in touch and we can map whether your idea fits an exemption, needs resource consent, needs building consent, or needs both, before you lock in a design that fights the rules.