Granny Flats NZ 2026: New Building Consent Exemption Explained

Written By Dani Greyson

From January 2026, new granny flat laws in New Zealand are making it easier, faster, and more affordable to build a granny flat, also known as a minor dwelling, on your property — without needing full building consent.

If you’re a homeowner in New Zealand, this is a major opportunity to unlock extra space, add value, and create flexible living options.

What are the new granny flat rules in NZ?

Under the 2026 law change, small standalone dwellings up to 70m² can now be built without building consent, provided they meet these specific requirements:

  • Be 70m² or smaller

  • Be single-storey

  • Meet the New Zealand Building Code

  • Be built or supervised by Licensed Building Practitioners (LBPs)

  • Be a simple design (no complex structural elements)

  • Notify Council before and after construction and meet any outlined requirements

In many cases, resource consent may also not be required, depending on your site and zoning.

What does this mean for homeowners?

The new granny flat consent exemption is designed to make building a minor dwelling in NZ more accessible.

1. Faster build timelines

Without building consent delays, you can move from design to construction much quicker.

2. Lower building costs

The new laws saves thousands in consent fees, making granny flats one of the most cost-effective ways to expand and add value to your property.

3. Add value to your property

Granny flat’s are one of the fastest-growing building trends in New Zealand due to the long-term investment potential they provide. Adding a secondary dwelling significantly boosts resale value and buyer appeal – this is a huge win in Auckland’s competitive property market.

  • Rental income (generating passive income)

  • Multi-generational living opportunities (providing affordable housing for family members)

  • Guest accommodation

  • Home office or studio space

What you still need to be aware of

While you may not need building consent, there are still important rules and costs involved.

1. Building Code compliance is mandatory

Your granny flat must still meet all structural, safety, and durability requirements under NZ Building Code regulations.

2. Licensed builders are required

Restricted building work must be completed or overseen by certified Licensed Building Practitioners.

3. Council will still be involved

You’ll still need to:

  • Notify council before building starts

  • Apply for and receive a Project Information Memorandum (PIM) before starting construction

  • Get approval for connections to network utilities (water and electricity supply, stormwater and wastewater disposal)

  • Obtain other required approvals depending on your project

  • Meet the rules and requirements of the Resource Management Act

  • Provide documentation after completion

4. Additional costs may still apply

Even without consent fees, you may still need to budget for:

  • Site works and foundations

  • Plumbing and drainage connections

  • Power and utilities

  • Development or infrastructure contributions

  • Architecture and planning costs

Build your granny flat with confidence

While the laws make building a granny flat more accessible, getting it right still requires expert planning, smart design, and experienced builders.

As a Licensed Building Practitioner, we specialise in delivering compliant, cost-effective granny flats and minor dwellings in Auckland.

Thinking about building a granny flat?

Reach out to the team to discuss your project and explore what’s possible on your property.

Contact us
Dani Greyson