Jamie Bonnefin

Jamie Bonnefin is Director of Certified Energy, an Australian ESD consultancy specialising in NatHERS, BASIX and building performance assessments. With more than 15 years of experience in sustainable design and energy compliance, he works with architects, developers and builders across Australia. He specialises in energy rating assessments for residential and commercial buildings, including NatHERS existing homes, BASIX compliance and performance modelling.

Building Better Communities Through Thoughtful Design

By Jamie Bonnefin on Apr 14, 2026 11:54:42 AM

Part 3 — The Built Environment as a Living System

When people think about buildings, the focus often falls on structure, materials, and appearance. Yet the influence of the built environment extends far beyond the walls of any individual building.

Topics: Architecture Sustainability Energy Efficiency

4 min read

Why Energy Efficient Homes Make Economic Sense

By Jamie Bonnefin on Mar 27, 2026 8:23:15 AM

Part 2 — The Economics We Don’t Always See

I’ve been thinking about how much our built environment shapes daily life. Across Australia the rising cost of living has become a central concern for many households. Conversations often focus on interest rates, fuel prices, or inflation. Yet one of the most significant household expenses is rarely discussed in the same way. The cost of running the home itself.

Topics: Sustainability Energy Efficiency

7 min read