Planning a new build, a renovation, or an extension in Dunedin usually starts with the same question. Do I need a building consent, and how hard is it to get one? A building consent in NZ is not something to fear, but it does catch people out when treated as an afterthought. This guide covers what a building consent is, when you need one, what is exempt, what it costs, and how to apply.
Quick Summary
A building consent in NZ is formal approval from your local council confirming that your planned work meets the New Zealand Building Code. Most building work needs one, though Schedule 1 of the Building Act 2004 exempts a defined list of low-risk work. The first job is always to check which side of that line your project sits on.
You apply to your local council. This is the building consent authority for your district, with plans, specifications, and the estimated value of the work. The council checks your application against the Building Code. Once the work is built and inspected, you receive a Code Compliance Certificate. Getting the application right the first time is what keeps a project on time and on budget.
What Is a Building Consent in NZ?
A building consent is your council's written approval to carry out building work in line with approved plans and specifications. It exists because all building work in New Zealand must comply with the Building Code. This is the national standard for safe, healthy, and durable buildings set under the Building Act 2004.
The consent is the council confirming that what you have designed meets the Building Code. The goal is to protect the safety and structural integrity of the finished building, even before the first building work begins.
For Dunedin projects, your building consent authority is the Dunedin City Council (DCC). Skipping a required consent is not a grey area: it is against the law, and the penalties are steep.
Do You Need Consent, or Is Your Work Exempt?
Most building work needs a consent, but Schedule 1 of the Building Act 2004 sets out the building consent exemptions in NZ. These exemptions identify low-risk work judged on size, height, and risk. Knowing it is what saves you time and money.
You can check whether your work needs consent using the government's official Can I Build It? tool. Common triggers include retaining walls over 1.5 metres high, decks more than 1.5 metres above the ground, sheds larger than 30 square metres, and all swimming pools and their fences. Structural work requires a building consent, as does any plumbing and drainage that adds a new sanitary fixture.
Renovations are where people most often get caught. A bathroom renovation that only swaps finishes may not need consent. But the moment you add a new sanitary fixture, you almost certainly do. A common question is whether you need building consent for recladding. Usually, you do, because it changes how your home keeps water out.
Homeowners often ask how big they can build without consent in NZ. Since 15 January 2026, you can build a granny flat up to 70 square metres without consent. It must be stand-alone and single-storey.
It must be built or supervised by licensed professionals. Even for exempt building work, you are still responsible for making sure it meets the Building Code.
Building without consent in NZ, when the work is not exempt, can bring fines of up to $200,000, so check before you start. If you are weighing up renovation work, it pays to confirm this early.
How to Apply for a Building Consent in NZ
To apply for a building consent in NZ, you lodge a building consent application with your local council, wait for it to check your plans against the Building Code, then build under inspection until a Code Compliance Certificate is issued.
For most residential buildings, the building consent process follows the same five steps, whether it is a new build or a renovation.
Prepare your application. Complete Form 2 from the Building (Forms) Regulations 2004 and gather your plans, specifications, and the estimated value of the building project.
Lodge it with your council. Submit your building consent application to the building consent authority for your district. For Dunedin projects, that is the DCC.
Council review. The council checks that your plans show the work meets the Building Code. For a complete application, it has 20 working days to decide.
Build with inspections. With your consent issued, you build according to the approved plans while the council inspects the work at set stages.
Get your Code Compliance Certificate. When the finished work passes, the council issues a Code Compliance Certificate (CCC), confirming the building meets the Building Code.
The biggest cause of delay is an incomplete building consent application, which is why getting your plans and documentation right matters. You can read the full requirements in the government's guidance on applying for building consent. For a Dunedin new home build, the DCC process is quite straightforward, but the paperwork still needs diligent care.
What Does a Building Consent Cost?
There is no single national price for a building consent. Building consent fees combine council application and inspection charges with the professional fees for preparing your plans, and all of it scales with the size and complexity of your project.
Every council sets its own fee schedule, so a small deck and a full new build sit at different ends of the range. The figure to keep in mind is the cost of getting it wrong: building without a required consent can bring fines of up to $200,000, far more than the consent itself. Consent fees are only one part of a build budget, so it helps to understand the other costs that catch people out, too.
Why It Helps to Have a Builder Manage Your Consent
An experienced, licensed builder who runs the consent process for you removes the two things that most often stall a project: incomplete applications and mid-build changes. Because we prepare consent applications regularly, we know what the DCC expects and how to present plans so they clear review the first time. As a Licensed Building Practitioner (LBP), Registered Master Builder, and HazardCo-accredited team, we handle the compliance while you focus on other equally important priorities. Read more about our team or how to choose a builder who manages consent for you.
Frequently Asked Questions
Do I need consent to renovate a bathroom in NZ?
Often yes. Cosmetic work, such as new tiles or a vanity swap, may be exempt from building work. But adding a new sanitary fixture, altering the plumbing and drainage, or changing waterproofing almost always needs consent.
Do I need consent to build a deck?
It depends on height. Decks more than 1.5 metres above the ground need consent, while lower decks are often exempt.
Do you need a building consent for a sleepout?
Usually, yes. Unless the sleepout qualifies as an exempt standalone dwelling under the granny flats exemption. A retaining wall over 1.5 metres high needs consent as well.
How long is a building consent valid for in NZ?
A building consent generally lapses if work has not begun within 12 months of it being granted. However, your council may agree to a longer period if the situation warrants it.
Can I build without consent if I think my work is exempt?
Yes, but only if the work is genuinely exempt under Schedule 1. As the building owner, you are responsible for deciding that correctly. You are also expected to ensure the finished work still complies with the Building Code.
Talk to Us About Your Building Consent
Not sure of what you need for a building consent in NZ, or how to get one through the DCC without delays?
Get in touchGet in touchGet in touch, and we'll talk you through what's involved for your specific build. We handle the consent process for our clients every day, so you don't have to figure it out on your own., and we'll talk you through what's involved for your specific build. We handle the consent process for our clients every day, so you don't have to figure it out on your own.
Call us at 027 479 7532 or 027 765 9584.Call us at 027 479 7532 or 027 765 9584.
References
Ministry of Business, Innovation and Employment. (2026). Check if you need consents. Building Performance. https://www.building.govt.nz/projects-and-consents/planning-a-successful-build/scope-and-design/check-if-you-need-consents
Ministry of Business, Innovation and Employment. (2026). Apply for building consent. Building Performance. https://www.building.govt.nz/projects-and-consents/apply-for-building-consent
Ministry of Business, Innovation and Employment. (n.d.). Can I build it? https://www.canibuildit.govt.nz/