John Butler

Sustainable building consultancy.

Certified Passivhaus Consultant.

Enabling low-carbon high-comfort building, retrofit and sensitive repair of older buildings.

Guidance, advice, consultancy and energy calculations for architects, self-builders and commissioners.
On-site tuition and training in sustainable low-energy building techniques.

I can help with assessing the most appropriate materials and approaches for your project, to ensure comfortable, healthy, low-energy building with minimal the environmental impact.