What building work does not need consent

Schedule 1 of the Building Act is the list of building work that can legally happen without a building consent. It is longer and more generous than most people expect, which is the good news. The bad news is that nearly every exemption on it comes with conditions, and the conditions are where people get caught.

This piece gives you the shape of the schedule and the traps around its edges. It is deliberately not a substitute for checking your actual job, because the exemptions turn on specifics: sizes, heights, distances to boundaries, what the work is attached to and what it contains. Treat everything below as 'often, subject to conditions' rather than 'always'.

Work that often sits inside Schedule 1

• General repairs and maintenance using comparable materials in the same position. Replacing rotten weatherboards, renewing spouting like for like, repairing a fence. This is the exemption most homeowners use without ever knowing it exists.
• A small, detached, single-storey sleepout or shed, provided it stays under the size limits and meets conditions about what it is and where it sits. The moment it gains a kitchen or plumbing, or becomes self-contained accommodation, it leaves the exemption entirely. A sleepout is a bedroom away from the house. A small flat is a different thing in law, whatever it looks like from the lawn.
• Some low decks and platforms, where the fall height stays below the threshold in the schedule. Height is measured to the ground below, which on a sloping section can put one end of the same deck inside the exemption and the other end outside it.
• Certain internal alterations that do not touch the structure. Built-in shelving and joinery, replacing linings, some non-loadbearing partition work. The word doing the heavy lifting is 'non-loadbearing', and confirming which walls are which is exactly the kind of thing worth an experienced set of eyes.
• Various small outdoor structures: some fences and retaining walls below height limits, garden features and similar. Retaining is a common trap, because the height limit drops away quickly once the wall supports a driveway, a building or anything else with a load behind it.

The traps around the edges

1. 01Exempt from consent is not exempt from the Building Code. Every piece of Schedule 1 work must still comply with the code. The exemption removes council's checking, not your obligations. Work done badly under an exemption is still non-compliant work, and it surfaces at sale time with nobody's signature on it but yours.
2. 02Some exemptions still require the right professionals. Parts of Schedule 1 only apply when the work is designed or carried out by the appropriate people, and anything touching structure or weathertightness runs into the Restricted Building Work rules, which require a Licensed Building Practitioner regardless of consent status.
3. 03Plumbing and drainage change the answer. A surprising number of 'simple' projects stop being exempt the moment water is plumbed in. This is the single most common way a legitimate sleepout becomes an unconsented dwelling.
4. 04The conditions are cumulative. A structure can pass the size test and fail on boundary distance, or pass both and fail on what it is used for. Meeting most of the conditions is the same as meeting none of them.
5. 05Other rules still apply even when the Building Act steps back. District plan rules, resource consent requirements and boundary setbacks live in different legislation and are not switched off by Schedule 1. Consent-exempt and rule-compliant are separate questions, and you need yes to both.

There is also a discretionary route worth knowing about. Councils have the power to exempt other building work from consent case by case, over and above the standard list, where they judge the work low-risk and likely to comply. It is council's call and nothing to bank on, but for sensible work that falls just outside the standard exemptions, asking the question costs little and occasionally saves a whole consent.

The honest way to use the schedule

Schedule 1 is genuinely useful. It keeps small, low-risk work out of the consent queue, saves you fees and weeks, and lets sensible projects happen at the speed of a spare weekend. We use it regularly, and part of our first site visit on small jobs is telling you whether yours qualifies, because sometimes the best news we can give you is that council does not need to be involved at all.

Just use it deliberately. When a job sits near a line, the cheap way to find out is to ask before building: your builder, a designer, or council itself. Councils deal with exemption questions constantly and would far rather answer one than process a Certificate of Acceptance later. Put the question and the answer in writing, whoever gives it, because an exemption you can point to in a file years later is worth far more than one you remember being told about.

And keep a file even though council is not involved. Photograph the work as it happens, keep receipts and product details, and note which exemption you relied on and why the job met its conditions. Nobody will ask for any of it this year. Somebody will absolutely ask at sale time, and a tidy file turns 'unconsented work, unknown' into 'exempt work, documented', which are very different sentences in a purchaser's lawyer's letter. The schedule rewards people who read the conditions and quietly punishes people who read the headline.