Passivhaus Affiliate

Standard Members

Membership of the Passivhaus Trust is open to anyone and does not necessarily imply achievement of the Passivhaus standard for buildings or components, or attainment of Passivhaus-related qualifications. Members of the Passivhaus Trust listed include architects, consultants, contractors, manufacturers and other industry professionals, as well as individuals, who support the work of the Trust in promoting the Standard in the UK.

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R H Partnership Architects



Race Cottam Associates


Race Cottam Associates are an award winning architectural practice founded in 1993 to deliver high quality design services and solutions. We are a team of Architects, Designers and Technicians based in Sheffield and London. We pride ourselves on our team ethic, care for responsive design and our drive to understand the needs and priorities of our clients. We are passionate about sustainable design and are committed to challenging sustainable design solutions in all our work. We work in a wide range of both public and private sectors including; Healthcare, Education, Civic & Community, Commercial and Environmental projects.


RAFT - Retrofit Action For Tomorrow



Rapungi Ltd


RDA Architects


RDA is an internationally experienced architectural practice set within the heart of South East London with a very simple philosophy, “we regard each and every piece of work as is if we were the client and the building belonged to us”. Our knowledge and experience ensures that we can comfortably handle a very broad range of projects from large commercial developments to beautifully crafted domestic buildings and sensitive unique renovation work.




Redsix are an independent sustainability and energy consultancy to the construction industry, helping our clients to achieve compliance targets as efficiently as possible. Our in-house Passivhaus, BREEAM and Energy (Part L & EPC) consultants will provide the highest level of quality and service, whilst maintaining a personal relationship with all our clients, making the process as simple and stress-free as possible.


Rees Pryer Architects LLP

Bury St Edmunds

Rees Pryer Architects are an award winning chartered practice based in Bury St Edmunds. Our projects range from individual domestic schemes to complex multi-disciplined projects. We pride ourselves on providing well-considered and innovative design solutions that meet both Clients’ needs and reflect the character of the area in which we live and work. We believe that the design solutions and integrated systems that are most successful in their implementation are those that are mostly passive, and in essence, simple in their application. By working closely together these principles can be developed to ensure the Client realises a thoroughly successful long term solution.


Retrofit Windows Ltd


Rexstone Builders Ltd



Rich Tyers Studios


Rich Tyers is a Chartered Architect and Certified Passivhaus Designer who has worked in the construction industry for well over a decade. Rich’s Bath based studio is dedicated to providing quality, sustainable and affordable architecture throughout the South West, Midlands and West London.

Richard Clayson

Bexhill on Sea

Richard Coles Builders Ltd



Richard Gaete-Holmes


Richard Haig



Ritchie + Daffin Ltd



Riverway Group


RJ Energy Consultants



Robert Cohen

Neston Corsham

Robert is Technical Director at Verco and the Technical Lead for the ‘Design for Performance’ initiative. Robert sits on the UK Green Construction Board Buildings Mission Task Group, the Climate Bonds Initiative Low Carbon Buildings Technical Working Group and the BBP Sustainability Benchmarking Working Group. He has also served on Advisory Boards for UK government Departments, the British Standards Institute and CEN Standards Committee TC89/WG4.

Robert Gordon University



Robert Johnstone


Robert Potter


Robertson Construction Group


Robertson is one of the largest family-owned construction, infrastructure and support services businesses in the UK. For over 50 years our sustainable growth has enabled us to invest in our business, the future of people and communities, and to deliver on major projects, housing schemes and facilities management for customers nationally. Our scale gives us the ability to accept big challenges and build mutually beneficial partner relationships, but we think locally too. Ultimately, our approach is about making progress safely towards a sustainable future. It’s the Robertson Way.


Rockliffe Williams Architects



Rory Kennon


Rowan Orchid Architects


Lars Christian Schneider is the founder and director of Rowan Orchid Architects. We are a design studio for architecture and interior design, based in London and Brighton. ROA work on a wide range of projects from refurbishment of and extensions to existing buildings, new-build family dwellings, to larger residential and mixed use developments. The practice uses an architectural BIM CAD software from the beginning of each project. Having worked in Germany, Ireland, the Philippines, Serbia and England, ROA combine international design inspiration and the best technical experience of all worlds. Increasingly ROA are working on environmentally conscious developments.


Ruth Butler Architects


Ruth Butler Architects is an award-winning RIBA Chartered Practice based in Hampshire and specializing in Passivhaus developments. We are passionate about working with clients to create modern, low-carbon architecture. We work on a broad spectrum of projects, including sport and leisure facilities, educational buildings, sensitive conservation and refurbishments and residential buildings. Ruth has successfully delivered Passivhaus-certified new-builds and deep retrofit projects to EnerPHit standard. We have an established track record for achieving planning permission on difficult sites. Ruth is an RIBA Client Adviser to Councils and Universities, a member of the Oxford Design Review Panel and an examiner for Portsmouth University.


Ruxandra Palcu Architects


Ryder Architecture

Newcastle upon Tyne