Open-source housing: Granny Flat

Deliver granny flat designs to reduce costs and support intergenerational living.
Lead organisation
University of Auckland
Focus area
Affordability
Start date
Status
In progress
Last updated 13 May 2026
Share

About the project

Timeframe: 1.5 years
Total levy funding: $220,000

New government reforms are making it easier for New Zealanders to build small, self-contained granny flats under 70m² – with no resource or building consent needed. This opens up new possibilities for families, seniors, and anyone needing flexible, affordable housing.

The University of Auckland’s Open-Source Housing: The Granny Flat project, led by architect/Professor Anthony Hōete and backed by $220,000 Building Research Levy funding, will deliver a nationwide set of adaptable, code-compliant design resources. These guides and tools will suit different sites, budgets, climates, and cultural needs, and include standardised templates, cost calculators, and practical design guides.

A strong focus on Māori and Pasifika housing needs, accessibility, and sustainability ensures the designs support whānau, aging in place, and resilient communities. By streamlining design and compliance, the project aims to reduce costs, speed up builds, and enabling more Kiwis to add value and space to their properties.

As new legislation is introduced in 2026, this project will help New Zealanders make the most of these changes – easing rental pressure and supporting better intergenerational living.