12/05/2025
A Granny Flat is coming to your back yard!
Do you have an errant teenager, a returning family member or a real life granny?
Is the household bulging?
Then a granny flat may be an option for you.
Get in touch with Mt Hobson Group now to help make your granny flat a reality.
Email [email protected] today.
The New Zealand Government has announced reforms aimed at simplifying the construction of minor standalone dwellings—commonly referred to as “granny flats” —as a measure to address the ongoing housing shortage and improve affordability.
Under current rules, granny flats require building consent and building consent to ensure compliance with safety and construction standards and may also require resource consent if local zoning provisions are not met.
Under the proposed changes, the threshold for the building consent exemption will increase from to 70m². This means that standalone granny flats up to 70m² will no longer require building consent, provided they meet the following conditions:
• The design is simple, single level, on a flat site and complies with the Building Code;
• The building work is carried out or supervised by a licensed building professional; and
• The local council is notified both before construction begins and once it is completed
It is important to note that this exemption will only apply once it comes into effect. It will not apply retrospectively to existing granny flats or projects currently under construction that otherwise meet the exemption criteria.
In addition, a new National Environmental Standard (NES) will be introduced under the Resource Management Act 1991. Expected to take effect by the end of the year, the NES will require councils to permit one granny flat per site in residential and rural zones without the need for a resource consent These changes are designed to streamline the regulatory process, remove development barriers, and support more diverse and affordable housing options.
The reforms aim to balance greater flexibility in housing provision with continued protection of building safety, environmental standards, and liability frameworks. They support multigenerational living, reduce regulatory barriers, and increase housing choice for families (Bishop et al., 2025). As Housing Minister Chris Penk stated, “Removing regulatory barriers is a critical part of increasing housing supply for New Zealanders” (RNZ, 2024).