Passivhaus Affiliate

Patron Members

Our Patron members, including companies and organisations who are leading the delivery of Passivhaus in the UK, make an essential contribution to the Trust’s work, support us in lobbying for policy changes, and inform the direction of campaigns and research at our annual Technical Panel.

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Accredited Passivhaus Design

Buckhurst Hill, Essex

Thinking of a new Passivhaus or EnerPHit retrofit? Accredited Passivhaus Design are enthusiastic about creating attractive buildings that are space efficient, comfortable to be in, contribute to their surroundings and use little energy. We use the Passivhaus method as it is proven in design and on site. Our Certified Passivhaus Designer has over 25 years' experience of creating housing for individuals, social landlords and care providers, from masterplanning to detail design. We can work with other architects and can provide construction stage energy calculations and working drawings for contractors. We can take you through the design, planning and construction stages of creating something seemingly impossible - Really comfortable, attractive buildings that cost very little to run. Our website can tell you more. Accredited Passivhaus Design is a trading division of the Tooley & Foster Partnership.




Architype is an architectural design practice with a passion for creating uplifting, genuinely sustainable architecture using environmentally conscious materials to deliver healthy buildings for people to work, live and enjoy. Sustainability is at the heart of Architypes culture, inspiring and informing everything they do. Operating from two busy offices in Hereford and London, their work is primarily in the social sector, encompassing education, community, culture, housing and health.




ATTMA, the Air Tightness Testing and Measurement Association are best known for running Competent Person Schemes across the UK, Spain, Australia and Dubai. The ATTMA provides assurance of quality by requiring members to be trained, insured and audited on a regular basis. The ATTMA also provides guidance to key industry stakeholders around the world and holds the largest database of test results and data in the world, collecting information from approximately 14,000 tests each month. ATTMA are pleased to offer training and quality assurance for testing to Passivhaus standards.


Baumit Ltd


Baumit is one of the leading European brands for sustainable plaster, render and external wall insulation for the construction industry. Founded in Austria in 1988, Baumit now has a presence in over 30 countries worldwide. Baumit UK offer an extensive range of innovative, tested products, including BBA approved EWI systems, façade renders, paints and healthy living indoor plasters. Product research, development and innovation, combined with excellent customer service are an important part of the Baumit values, and we work in close cooperation with our partners to ensure every project is a success.


Ecology Building Society


Ecology Building Society provides ethical savings accounts and green mortgages for properties that benefit the environment. The prime focus of the Society is to promote an ecological approach to the built environment in the UK, and thereby foster sustainable communities. We seek to minimise energy use and waste in both our office and business practices. Our mortgage product range includes: C-Change Discounts for residential borrowers, which offer a 1.25% discount off our Standard Variable Rate for Passivhaus certified homes for the lifetime of the mortgage. Small Scale Development Loans and Commercial Mortgages for developers of Passivhaus standard properties.


Exeter City Council


Exeter City Council has championed the Passivhaus standard over the last 10 years delivering over 100 Passivhaus affordable homes across the city to date. The City Council is currently constructing the UK’s first certified leisure centre and Extra Care Home village with completion scheduled later in 2020. The City Council also has its own private development company, Exeter City Living Ltd which has a pipeline of Passivhaus developments many of which are open market homes. Exeter City Living’s approach to development encompasses a triple-bottom line business principle, ensuring all new developments are Passivhaus, healthy, climate resilient to 2080 and offer value for money. The Council has accumulated substantial knowledge and experience of Passivhaus over the last decade and has a dedicated team of Officers and consultants who can be utilized on a consultancy basis to assist other Local Authorities or private entities with their Passivhaus ambitions


Hastoe Housing Association

Saffron Walden

Hastoe is an independent registered housing association managing over 4000 rented, shared ownership and leasehold homes across the South, East and West of England. Our roots are in innovation. This has led to specialisms in rural communities and in climate protection. Our development of the Passivhaus scheme at Wimbish is a perfect example of what we aim to achieve - sustainable homes and communities which provide affordable homes for local people. Our subsidiary, Sustainable Homes Ltd ( the leading UK sustainability and consultancy provider for the sector and beyond. They provide exemplary training on the Passivhaus standard.


ICF Supplies Ltd


ICF supplies was founded in 2012 by our managing director, who at the time ran an architectural practice. He was so impressed by the Nudura system, along with the thermal performances achieved, that he became a distributor. Working out of our Basildon headquarters we have quickly grown to be the largest supplier of insulated concrete forms (ICF) in the country. Being inherently airtight, our system makes this aspect of the build much more straightforward to achieve and with the concrete core as the structural element, once achieved this will not be lost through building movement over time. We have a comprehensive range of PHPP Psi value certificates. The heart of the Nudura design is providing very thermally efficient housing by means of very effective insulation encapsulating the thermal mass. We not only supply Nudura ICF but crucially provide training and hands on practical assistance on site to ensure that our products are used correctly and appropriately throughout the process.


Kingspan Insulation Limited


Kingspan Insulation is a market leading manufacturer of optimum, premium and high performance rigid insulation products and insulated systems for building fabric and building services applications. Kingspan Insulation is one of the founding members of the Passivhaus Trust and is at the forefront of the low energy building drive, helping architects and developers get the most energy efficient building envelope performance whilst taking up minimal space. Its products are among the most thermally efficient and technically advanced insulation materials available and have many advantages over traditional insulation materials.


Knauf Insulation

St Helens

Knauf Insulation is the leading provider in the UK of high performance, non-combustible, sustainable Glass and Rock Mineral Wool insulation solutions. With more than 40 years of experience in the insulation industry, it is one of the fastest growing and most respected names in insulation worldwide. Manufactured using up to 80% recycled content, Knauf Insulation mineral wool solutions offer four key benefits to building occupiers. As well as thermal performance, they are non-combustible for fire safety, provide sound absorption and noise reduction for superior acoustic performance, and contribute to higher indoor air quality thanks to the Knauf Insulation revolutionary ECOSE Technology bio-based binder.


Munster Joinery UK


Munster Joinery is amongst the largest manufacturers of energy efficient windows and doors in Europe. Founded in 1973, the company has grown year on year with the continuous development of new products, materials and processes. The company has a 940,000sq ft. production facility in Ireland and another 230,000sq Warwickshire in the UK. In recent years Munster Joinery has focused on developing energy efficient products through green and sustainable processes and operations. All of the products are designed for optimal thermal performance with U-values as low as 0.47 W/m²K. Several window systems, all of which are designed, developed and manufactured in house are now Passive House certified. Property owners are assured of an energy efficient product from an environmentally aware source together with an efficient service when they purchase Munster Joinery products.


Saint-Gobain UK & Ireland

Loughborough, Leicestershire.

Our mission is to create great places and improve daily lives. As a business, Saint-Gobain designs, manufactures and distributes materials and solutions, which are key ingredients in the wellbeing of each of us and the future of all. They can be found everywhere in our living places and our daily life: in buildings, transportation, infrastructure and in many industrial applications. They provide comfort, performance and safety while addressing the challenges of sustainable construction, resource efficiency and climate change.


Stewart & Shields Ltd


Stewart & Shields Ltd are proud Patrons of the Passivhaus Trust and are proactively bringing the Passivhaus Standard into the reach of Councils and Housing Associations throughout Scotland. As well as building for private owners we have, with the help of our design partners, developed a method of bringing Passivhaus Buildings within the financial parameters required for multi-unit Social Housing. This addresses important Scottish issues such as Fuel and Child Poverty whilst at the same time addressing worldwide issues by reducing the Carbon Footprint. Stewart & Shields have been creating innovative buildings for five decades and are now dedicated to delivering the Passivhaus Standard.


The Design Buro

Leamington Spa

The Design Buro is an international business that specialises in technologies associated with Modern Methods of Construction (MMC), including modular construction. MMC delivers productivity improvements that result in shorter building times and waste reduction which can in turn lead to lower costs for industry. For the consumer and society this translates to better quality and lower prices when considering both acquisition and maintenance costs, as well as an improved environmental and energy-use footprint. We are the most experienced business in this sector and our team of international experts support all stages of the design and construction process, including MMC Design, Civil, Structural and MEP Engineering, Building Physics, Sustainability, Energy Consultancy, Production, Procurement, Site Installation, and Quality Management. The Design Buro have recently acquired the Building Physics team from Encraft Ltd who have a wealth of experience in the delivery of buildings to the Passivhaus standard, the team to date have delivered over 100 Passivhaus certified buildings


Warm: Low Energy Building Practice


WARM: based on theory and practice. Everything we do comes down to building physics. From an airtight green-oak office to a refurbishment of a conservation property, we have continually tested our ideas on our own properties. Warm was formally set up in January 2009 by father and daughter Peter Warm & Sally Godber. Their aim – to designing buildings that demonstrated real energy savings. The Passivhaus standard hit a chord with this ambition and quickly became the mainstay of their work. Warm now specialise in Teaching, Designing, Certifying & Testing to the Passivhaus standard. Peter is endorsed by the Passivhaus Institut in Darmstadt as a certifier, so they can offer a complete package.


Willmott Dixon


Willmott Dixon Group, founded in 1852, is the UK’s third largest privately-owned capital works, regeneration and support services company. The company’s family values and respect for people has seen the business achieve numerous accolades as one of the best places to work in construction. Willmott Dixon for the past three years has been the highest placed major contractor in the prestigious Sunday Times Best Companies to Work For list. Willmott Dixon’s internal sustainability consultancy, Re-Thinking, has a number of staff trained and qualified as Certified Passivhaus Designers and is actively promoting use of the approach across its three divisions.