Last reviewed: July 2026 · How we research these costs · Council rules: Auckland Council
I’m Dave, and I’ve spent the last 21 years renovating and building houses across Auckland — villa reblocking in Grey Lynn, garage conversions out in Henderson, the odd sleepout tucked into a Titirangi section — mostly on housing stock built anywhere from the 1900s through to the 1930s. The question that comes up on almost every quote is whether the job actually needs a building consent. People mix that up with resource consent constantly, and they’re not the same thing: resource consent is about land use and planning rules, while a building consent is Auckland Council’s formal sign-off that your work meets the Building Code before you start, backed up by inspections to confirm you built it the way the plans said.
This guide sticks to the building consent side of that split: what needs one heading into 2026, what you can usually get on with, how the two kinds of consent differ, and how an application actually moves through council. The Building Act treats “get a consent” as the default and carves exceptions out of it — so on site I never ask whether a job needs consent, I ask whether it fits inside one of the exemptions. Everything below is a working guide, not legal advice; the current exemption schedule on the council’s own pages is the authority when it matters.
Key takeaways
- Building consent is the Building Code sign-off; resource consent is a separate planning approval — a job can need one, both, or neither.
- Structural changes, retaining walls over 1.5m, new plumbing/drainage runs and solid-fuel heaters all typically need consent.
- Genuine maintenance, low decks under 1.5m, most fences under 2.5m and like-for-like fixture swaps are usually exempt.
- Every exemption has conditions — a shed that gains a toilet, or a deck that creeps over 1.5m, quietly becomes a consent job.
- Council has a statutory 20 working days to process a complete application, but the clock pauses every time they request more information.
- Restricted Building Work must be done or supervised by a Licensed Building Practitioner, and the job isn’t finished until the Code Compliance Certificate is in hand.
In this guide
Jobs that land you back at council
- Structural changes — pulling out or altering a load-bearing wall, adding a room, most decks built more than 1.5 metres above the ground.
- Retaining walls over 1.5 metres, or any retaining wall carrying extra load, like a driveway or a structure sitting above it.
- New plumbing and drainage runs, and most changes to sanitary fixtures beyond a straight swap.
- Installing or moving a solid-fuel heater — a wood burner, basically.
- Additions, sleepouts with plumbing, garages and carports once they’re bigger than the exempt size.
- Re-cladding, and weathertightness repairs that go beyond routine maintenance.
Jobs you can usually just get on with
- General repair and maintenance using comparable materials — repainting, replacing a handful of weatherboards on an old villa.
- A detached, single-storey sleepout or shed under the exempt floor area, as long as it has no cooking or sanitary facilities and meets the boundary and height rules.
- Low decks and platforms under 1.5 metres.
- Most fences under 2.5 metres — pool fencing is its own, much stricter, story.
- Like-for-like fixture swaps done by a licensed tradesperson.
- Laying or replacing a driveway or path on the flat — though the vehicle crossing onto the road is a separate Auckland Transport approval, not a building consent.
The cheat sheet I keep in my head
When I’m pricing a job I run it against these numbers before I say anything to the client:
| Work | Threshold | Consent status |
|---|---|---|
| Deck or platform height | 1.5 metres above ground | Over: consent required. Under: usually exempt |
| Retaining wall height | 1.5 metres | Over, or carrying extra load: consent required |
| Fence height | 2.5 metres | Under: usually exempt (pool fencing has its own rules) |
| Council processing time | 20 working days | Statutory clock; pauses whenever council requests more information |
Building consent vs resource consent
This is the mix-up I untangle most often, so it’s worth laying out plainly. They’re issued under different laws, for different reasons, and a single project can need one, the other, both, or neither.
| Building consent | Resource consent | |
|---|---|---|
| What it’s about | Whether the work meets the Building Code | Whether the use of land fits the planning rules |
| Set by | Building Act / Building Code | Auckland Unitary Plan (RMA) |
| Typical triggers | Structural work, plumbing, decks/retaining over height | Height-to-boundary, site coverage, impervious surface, heritage |
| Ends with | Code Compliance Certificate (CCC) | Resource consent decision, sometimes with conditions |
For most straightforward renovation work it’s the building consent you’re dealing with. Resource consent tends to surface when you’re pushing site coverage, building close to a boundary, adding a large area of hard surface, or working on a heritage-scheduled property — which around the older Auckland suburbs I work in is more common than you’d think.
Where the exemption quietly runs out
Every one of those exemptions comes with conditions, and I’ve watched jobs slide out of exempt territory without anyone deciding that on purpose. A shed that picks up a toilet, or a deck that creeps past that 1.5 metre mark once you account for the finished ground level, is suddenly a consent job. If there’s any doubt, the current schedule of exemptions on the Auckland Council building and consents pages is the actual authority, and it does get updated as the rules shift.
Consent isn’t red tape for its own sake — it protects whoever buys the house after you’re gone. Auckland’s leaky-building years, and the flooding we’ve had more recently, both trace partly back to work nobody properly checked. Unconsented work tends to surface at three points: when you insure the house, when you sell it, and when a LIM report puts the gap in front of a buyer’s lawyer. Any one of those moments can cost a lot more than the consent ever would have.
How a consent moves through council
Restricted Building Work — the structural and weathertightness parts of a house — has to be carried out or supervised by a Licensed Building Practitioner. That sits alongside the consent, not instead of it, so having an LBP on the tools doesn’t get you out of lodging an application.
The path itself is straightforward on paper: you lodge an application with plans, council has a statutory 20 working days to process it, and that clock stops dead every time they come back asking for more information. Then you build the work, book inspections at each required stage, and once everything’s passed you get handed a Code Compliance Certificate. That CCC is the one document a future buyer’s lawyer will go looking for, so I never call a job finished until it’s actually in hand. The single biggest thing you can do to keep that 20-day clock moving is lodge thorough, complete plans the first time — most of the real-world delay comes from the back-and-forth, not the processing itself.
What clients actually ask me
How long does a building consent take in Auckland? Council has 20 working days to process a complete application, but real-world timelines often run longer because the clock stops every time they ask for more information. Sending in thorough plans the first time round is still the best way to avoid the delay.
What happens if I do consentable work without consent? It becomes unconsented work, and that can show up on a LIM report, complicate your insurance, and stall a sale down the track. Council can make you apply for a Certificate of Acceptance after the fact, which isn’t guaranteed and can mean opening up finished work again for inspection.
Do I need consent to replace like-for-like? Usually not. Swapping a tap, a toilet, or a few weatherboards for equivalent ones counts as maintenance. The moment you change the size, layout or structure, or shift plumbing, you’re back in consent territory.
How much does a building consent cost in Auckland? There’s no single figure — council sets fees against the value and scope of the work, so a wood burner install and a full addition sit at completely different price points. I always price the likely consent cost into a quote rather than let a client find out later, and council’s own fee schedule is the accurate source once plans are firmed up.
Do older villas and bungalows need consent for repairs too? Same rules apply regardless of the house’s age. Repainting or replacing a few boards on a villa built in the 1900s is maintenance, same as on a house built last year. Where it gets tricky is when a “repair” turns something up — rotten framing behind those weatherboards, say — and the fix ends up going well past like-for-like.
If you’re not sure which side of the line your job sits on, price the consent in early and check the current exemption schedule with council before you start — it’s a far cheaper conversation to have now than at sale time. Cosmetic work almost never crosses that line, which is why a Hamilton painter can start on a repaint without touching council at all.