Etude provide Passivhaus Certification from our office in Islington, London. We are also sustainability engineers, environmental designers and Passivhaus designers, and can help you plan, design, analyse and evaluate low energy and low carbon buildings.

Other services

This website is for our Passivhaus Certification services. To find out more about other Etude services see our main website.

Passivhaus Institute

We certify buildings to the Passivhaus building standard on behalf of the Passivhaus Institute, Darmstadt. We are one of only four companies carrying out Passivhaus certification and based in the UK.

International collaboration

We are part of an international community of low energy building specialists. We share experience to improve construction quality and learn. Below are some of the Passivhaus Certifiers from around the World at the international certifiers meeting in Darmstadt 2016. Spot Will!


Will South

Will is our lead Passivhaus Certifier registered with the Passivhaus Institut. He has a background in Mechanical engineering and has considerable practical experience with all scales of low energy building construction. Will is responsible for signing off all Passivhaus Certification projects.

Naomi Grint

Naomi has a rich background in architecture, policy and housing. She previously worked for Architype and Parity Projects. Naomi focuses on building physics and is currently completing a PhD on heat and moisture transfer through solid brick walls and the impacts of internal wall insulation.

Leon Tatlock

Leon is an energy specialist and Chartered Engineer with over 10 years’ experience in construction. He is an expert in dynamic simulation of buildings and helps on our larger projects where more detailed modelling is required, such as in assessing overheating risk.

Ed Cremin

Ed is an Environmental Scientist and experienced sustainability consultant. He was involved in one of the first larger Passivhaus schemes in London while at Atelier Ten and now focusses on training and PHPP checks for the Passivhaus team.

Dora Ma


This website has been developed by Etude with help from Becca at Madewise for design, and Andy Moore for web development.