There have been a few articles recently about granny flat changes. Despite headlines, this process is not as simple as it may seem, and homeowners should understand the rules before they “go forth” and build.

From 15 January 2026, new rules came into play to allow standalone dwellings up to 70 square metres to be built without a building consent or resource consent. The intention of the “granny flat exemption” is to shorten the consenting process for homeowners and save money on consenting costs.

Although consent may no longer be required, homeowners must still ensure granny flats are built in compliance with the Building Code, local planning rules and the rules for the exemption. In some cases, a building consent and a resource consent will still be required.

Things to watch out for:

• The building must be built or supervised by a licenced professional
• Plans, documentation and sign offs must still be supplied to the Council
• Homeowners must apply for, and receive a Project Information Memorandum (PIM) from the Council before construction can begin
• The building must be two metres away from any boundary and any existing property or a resource consent may be required
• The Council can still charge development contributions which can be a significant cost to homeowners
• Showers are allowed under the exemption however, showers that need a waterproof membrane (wet-floor/level entry showers) will need a building consent
• Any wood burner or solid fuel burner will also need a building consent
• Certain zoning rules may mean a building or resource consent is also required

This is a good opportunity for homeowners, but it is important to understand your obligations and the rules before starting work. Non-compliance can create headaches when it comes time to sell and non-compliant work can be costly to resolve down the track.

If you’re looking to make significant changes to your property, don’t get caught out. We can provide advice and assistance on all types of property issues.