We are

We offer proven building physics experience, delivering Passivhaus and low energy buildings that work in reality.

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Our Services


We work as energy consultants on a huge range of Passivhaus and low energy developments both large and small scale; our collective experience is unrivalled in the UK.


Passivhaus certification sets Passivhaus apart from other building standards. We have a wide range of experience certifying one off homes to large commercial buildings.


We work closely with Coaction Training CIC (previously CarbonLite), to support their comprehensive programme of practitioner-led Passivhaus training.


We offer a range of building performance testing and monitoring from coheating, air leakage testing, energy consumption and comfort analysis.

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Project Spotlight

Consult Passivhaus

Goldsmith St.

~100 dwellings for Norwich City Council. The scheme comprises a mix of 2- and 3-storey houses and apartment blocks.

Certify Passivhaus

Agar Grove

~350 dwellings over a number of blocks. Initially 35 flats in a single block.

Consult Passivhaus


20 homes for open market, one of the first purely speculative Passivhaus developments in the UK.

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"WARM have worked extremely well to accommodate the requirements of the council, I would recommend WARM for future projects."

Andrew Turnbull Interim housing development manager

"Experience based on in-depth Passivhaus project involvement, and the skills to communicate this to others, are what we really value."

Alasdair Donn Willmott Dixon

"Their positive contribution to the project has been recognised by both the client and other design team members."

Gwilym Still Max Fordham

"WARM’s help and guidance was invaluable in providing learning and knowledge to our team"

James Halsall Mae Architects

"WARM were crucial in the success of our Passivhaus affordable housing development."

Claire Newcombe Plymouth Community Homes Ltd

"They challenged decision making, offering alternative, less costly, solutions. WARM are passionate about the work that they do support Hastoe in our drive to build super energy efficient and healthy homes."

Karen Hillhouse Hastoe Group

"Their pragmatic, clear and patient approach to incorporating Passivhaus which is often unfamiliar to other design team members has been invaluable."

Tom Heel University of Oxford

"Working with WARM, was enlightening, educational and enjoyable."

Mark Longworth DP Architects


Our news

Posted Byadmin / 28 Jun 2023

Constructionline accreditation confirmed!

We are delighted to have been awarded our first accreditation with Constructionline!

Posted Byadmin / 9 May 2019

What questions should I ask when buying an eco/green/low energy home?

From many years of painful conversations with people who have “bought a pup” I bring you this simple list which I hope will empower you to get what you think...

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