Passivhaus Affiliate

Standard Members

T Richard Jones (Betws) Ltd


Tate Harmer LLP


Our practice is committed to developing sustainable low-energy architectural solutions achieved by understanding our client's requirements and mimicking natural systems whilst embracing cutting edge developments in construction and computer technologies. We design buildings that bring architecture and nature together.


Taylor Kay Architecture


Taylor Kay Architecture is a practice based in South East London that is committed to exceptional design with minimal impact on the planet’s resources whilst still providing excellent value for money. We strive to exceed our clients’ expectations as to what can be achieved within the project constraints. We treat each project individually and create designs that are imaginative and beautiful whilst also affordable and practical. It is important to us that the design responds sympathetically to both its location and the natural environment.


Tectonics Architects Ltd


TECTONICS is a design led architectural practice based in East London. With extensive experience in residential projects, Tectonics have completed urban site in-fills, bespoke alterations to traditional London housing stock and complete new-build properties. The practice is also involved in cultural and community buildings including various international planning proposals. Sustainability is at the heart of the approach to each project, incorporating the best use of natural light, ventilation and solar gain, good quality materials and reduced energy consumption techniques wherever possible.


The Casey Group Ltd


Strong leadership has meant that Casey has stayed at the forefront of changing practice. Delivering the UK’s first large scale retrofit EnerPhit project, of 32 maisonettes in Manchester, saw Casey develop ground breaking techniques to achieve the prescribed standards. Better housing, better social environments and a better standard of living help create communities that are better integrated and that enjoy a heightened sense of unity. Preserving the environment, commitment to quality and caring for the community are the three central principles on which Casey places its business. It is these that give company its enviable record of delivery of first class product on time, within budget and with the highest regard for quality, safety and customer satisfaction.


The Eco Refurbishment Company

Greater London

The Eco Refurbishment Company is a building company at the forefront of environmental construction and refurbishment, delivering sustainable construction solutions in one complete package. Our approach is to waste no opportunity to improve the performance and reduce the environmental impact of buildings either during construction, refurbishment or conversion process. Our Project Director is a Passive House Certified Tradesperson and all our operatives have been through the Fabric First Better Building Programme. Our core areas of operation cover London and all the South East, recent projects include a ZED house, CSH Level 5 house and several low carbon retrofits.


The Healthy Home Ltd


The Healthy Home Ltd designs, project-manages and carries out residential retrofits for health, comfort and energy efficiency and specialises in using the appropriate modern and natural materials to ensure a moisture robust result. The director of the company, Richard Bendy, is a certified Passivhaus Consultant who has also successfully completed the AECB’s Carbonlite Retrofit course; he is a BPEC certified MVHR/MEV designer/installer/commissioner as well as being a NAPIT registered domestic electrical installer with a special interest in the use of circadian/sunrise/sunset lighting to improve occupant health.


The Make Group


Make is a design led chartered building company based in Bristol. Working on creative construction projects; Make will deliver on-time, to budget and with no defects. Bringing experience of major contracting to the domestic market, Make can call upon a skillset that is rare amongst local builders. This enables us to tackle the larger and more complex domestic projects. At Make, we Design, Plan, and then Build. This may take a little longer, but it gives us the time to build relationships and to build quality.

Tina Ttofa




Trecodome provides strategic advises on the transition towards an eco-society, a sustainable built environment and the relation between innovation, investment in sustainability and closing cycles.


Trunk Low Energy Building


Trunk is a Chartered Building Consultancy dedicated to delivering very low energy and Passivhaus homes. Expert in both new build homes and refurbishment projects, including listed buildings, Trunk is committed to best practice. We have handled many projects, everything from the highly contemporary to quirky listed buildings, infusing all of them with low energy and Passivhaus principles that go way beyond mere compliance. Trunk’s offering is simple but highly flexible. It spans design, consultancy and project management, with expertise every step of the way. Proud Winners of Constructing Excellence 2013 'Achiever of the Year' and Finalists for 'Project of the Year' and 'Leadership and People Development'. Trunk's Mike Jacob was named as one of Building Magazine's 50 Rising Stars of Sustainability.