John Butler

Sustainable building consultancy.

Certified Passivhaus Consultant.

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

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

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

Combining practical guidance with interrogation of data.