May 15, 2025
Adding a granny flat—also known as a minor dwelling or secondary unit—to your property is an increasingly popular way to maximise land use, accommodate extended family, or generate rental income. With upcoming regulatory changes making the process more accessible, now is an excellent time to consider building a 60–70m² granny flat.
Why Build a Granny Flat?
Granny flats offer versatile solutions for various needs:
- Multigenerational Living: Provide independent yet close housing for elderly parents or adult children.
- Rental Income: Generate additional income by renting out the unit.
- Home Office or Studio: Create a dedicated space for work or creative pursuits.
- Guest Accommodation: Offer comfortable lodging for visitors without compromising your main home’s privacy.
A 60–70m² granny flat typically includes one to two bedrooms, a bathroom, a kitchen, and a living area, making it a self-contained and functional space.
Design Considerations
When planning your granny flat, consider the following:
- Layout Efficiency: Maximise space by opting for open-plan designs and multi-functional areas.
- Natural Light: Incorporate ample windows and consider the orientation to enhance natural lighting.
- Privacy: Position the unit to maintain privacy for both the main house and the granny flat occupants.
- Accessibility: Design with accessibility in mind, especially if intended for elderly residents.
Engaging with experienced designers or architects can help tailor the granny flat to your specific needs and site conditions.
Upcoming Building Consent Exemption
Starting in early 2026, New Zealand homeowners will benefit from a building consent exemption for small standalone dwellings up to 70 square metres. This change aims to simplify the building process and reduce associated costs.
To qualify for the exemption:
- Design Compliance: The dwelling must have a simple design and meet all Building Code requirements.
- Professional Oversight: Construction must be carried out or supervised by licensed building professionals.
- Council Notification: Homeowners must notify their local council before commencing construction and upon completion.
Additional conditions include:
- Structure Specifications: The building must be single-storey, standalone, and detached.
- Size Limitations: The net floor area must not exceed 70 square metres.
- Setbacks and Height: The building must be at least 2 metres away from any other structure or legal boundary, with a maximum height of 4 metres above the floor level.
This exemption is part of the government’s initiative to increase housing options and affordability by reducing regulatory barriers.
Final Thoughts
Building a 60–70m² granny flat is a practical and increasingly accessible option for New Zealand homeowners. With the upcoming building consent exemption, the process will become more straightforward, allowing for quicker and more cost-effective construction.
If you’re considering adding a granny flat to your property, now is the time to start planning. Consult with licensed professionals to ensure your project meets all requirements and to take full advantage of the forthcoming regulatory changes.
Note: The information provided is based on proposed regulations expected to take effect in early 2026. Always consult with local authorities and professionals for the most current requirements.