Sustainability

PASSIVE DESIGN, HOME-STAR, ENERGY MODELLING

We don't treat sustainability as a bolt-on. It's in the design from the start, in the orientation, envelope, glazing, and ventilation that determine how a building actually performs. We run energy modelling in-house, so we can test options early and make the call on data, not guesswork. We have a Homestar Designer and Assessor on the team, and offer modelling as a standalone service too.

Our specialties

With a Homestar Designer and Assessor on our team, we guide you through New Zealand's independent rating system for healthier, more efficient homes. A Homestar-rated home is warmer, drier, and cheaper to run.

We run energy modelling in-house, testing how a home will perform, its heating demand, running costs, and summer comfort, before it is built. That means decisions get made on data, not guesswork.

Orientation, glazing, insulation, and shading, designed as one system so the building does the work. Good passive design keeps a home comfortable year-round and cuts running costs.

We demonstrate Building Code energy efficiency (H1) through modelling where it suits the design. It is the most flexible compliance route, and it rewards good design rather than a fixed checklist.

Sustainable Projects
CLIENT TESTIMONIALS
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"We’ve had a fantastic experience working with Voxell, the ideas and level of detail in their design for our home, along with the overall vision has been exceptional. The Voxell team were great at communicating with us and have solid processes in place to get things done. In terms of quality, we couldn’t have even dreamt this up! We can’t wait to show off our new house soon and we’d be happy to recommend Voxell to others wanting to create their own slices of paradise"
Gabriella Grace, Residential Home Owner
Related News

View our articles for the latest work in progress and project updates.

View all insights
Why new NZ homes overheat (and how to stop yours)
Why new NZ homes overheat (and how to stop yours)
Ideas
2026
Why townhouse schemes fail Homestar by accident
Why townhouse schemes fail Homestar by accident
Ideas
2026

LET'S TURN YOUR VISION INTO A BRIEF

Start with a free consultation
Our Architectural Advisors can help to discuss the scope of your project and collect information to prepare a proposal for you and your team. Complete the form below or email us directly at info@voxell.co.nz
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