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Granny Flats

About the Granny Flats Legislation

New legislation came into effect on January 15th, 2026.

One of the most important things about the Granny Flat legislation is that there must already be an existing dwelling on the proposed building site, section or allotment.

The exemption does not apply if there isn't an existing dwelling.

As to whether or not the new granny flat can be subdivided off later will depend on current District Plan rules as well as meeting minimum allotment sizing.

These types of questions should be directed to Council's Planning Team.

The below links to MBIE's Building website provide more information and guidance about the Granny Flat legislation.

Once the homeowner has decided that their Granny Flat Proposal meets the criteria for the Exemption they must apply to the local Council's Planning Department for a Project Information Memorandum (PIM).

The PIM process ensures that the building work will meet the the District Plan requirements and exemption requirements.

Find out more about Project Information Memorandums (PIM) here.

After the PIM is issued, the homeowner has 2 years to complete their build.

All relevant records of work for foundations, framing, bracing, roofing, cladding, and other records are submitted to Council, as well as plumbing and drainage plans and electrical certificates.

These records will be saved to the relevant property file with the PIM associated with the Granny Flat.

Council's Building Inspectors do not come to site to undertake inspections, unless there is a complaint made. Council are not liable for any of the building undertaken under this exemption.

The Government is relying on Licensed Building Practitioners to do the right thing, so it is important that homeowners do their own due diligence. Homeowners should ensure they have insurance and a building contract in place with their designer, builder, roofer, plumber, electrician and any other tradesmen.

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