Homestar is a comprehensive, independent national rating tool, run by the not-for-profit Green Building Council, that measures the health, warmth and efficiency of New Zealand houses. A home is rated on a scale from 6 to 10.

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A 6 Homestar rating or higher means the home will be easier and more cost effective to keep warm, healthy and more environmentally friendly than a new house built to building code. A 10 Homestar rating means you've built a world leading home.

To rate a home’s performance and environmental impact, Homestar awards points across several categories: density & resource efficiency; energy, health & comfort; water; waste; materials; site; home management; and an optional innovation category.

There are two stages to a Homestar rating:

  • Design – this rating assesses the full and final plans.
  • Built – this rating occurs after a home is constructed. It certifies that the features in the Design rating have been fully implemented.
  • Homestar is owned, together, by all of us in the green building movement who want homes in Aotearoa to be healthy, warm, dry places for New Zealanders to thrive in. We have recently completed public consultation on Homestar. You can find more information about the consultation and how we're continuing to develop the standard here.

    Want to find out more?

    Watch this introduction to Homestar online course, which has been specifically designed for those wanting to get a basic understanding of Homestar. These are also the first two modules in the complete Homestar Practitioner course.

    Learn more here