Sustainable Design

Sustainable design is a key area of focus for our practice. We incorporate environmentally sustainable design principles into all projects, to make a positive impact for our environment and the clients and communities we serve.

We’re committed to playing our part as a business; our practice is a member of the New Zealand Green Building Council, and we are certified Ekos Net Zero Carbon for Business Operations.

Bragato Research Winery which uses a number of sustainable design principles, was certified 5 Green Star NZ Industrial Built v3 in 2021 by the New Zealand Green Building Council

Bragato Research Winery, Blenheim


At the start of every project, we identify opportunities to improve building performance and reduce construction and running costs. Working to agreed objectives, we analyse building performance to produce robust and efficient buildings to meet the needs of our clients and the environment.


Homestar, Green Star

The JTB team includes experienced and accredited Homestar Assessors and Designers, who can guide clients through the benefits of both the Homestar and Green Star standards. This enables clients to make informed decisions based on environmental impact and financial returns.

Our team is also able to undertake environmental assessments and prepare rating documentation on behalf of clients, for submissions to the New Zealand Green Building Council and local authorities.

Passive House

Passive house design is a fabric-first approach that delivers highly energy efficient, healthy and comfortable buildings.

Our practice’s Sustainability lead, Senior Architect Nathan Edmondston, is a Certified Passive House Designer and has been involved in the movement since its inception in New Zealand.

Nathan has recently delivered his own certified passive house project, achieving a 10 Homestar rating from the New Zealand Building Council in the process – one of only seven to achieve this nationwide.