Passivhaus Affiliate

Members Directory

Hastoe Housing Association

Hampton Wick, Surrey

Hastoe is an independent registered housing association that owns and manages over 7,500 homes of mixed tenure, including affordable rent and shared ownership. As the UK’s leading rural housing provider, it supports communities in 70 local authority areas across the south of England; from Cornwall to Norfolk. Its roots are in innovation and this has led to specialisms in rural communities and in climate protection. By 2019, Hastoe had delivered 12 Passivhaus schemes including the UK’s first rural affordable Passivhaus scheme at Wimbish in Essex. This scheme continues to provide useful insights into Passivhaus developments in the UK.


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.


Willmott Dixon


Willmott Dixon Group, founded in 1852, is the UKs third largest privately-owned capital works, regeneration and support services company. The companys 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.



Hereford, London, Edinburgh

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.


WARM: Low Energy Building Practice


Warm is an independent consultancy with the theoretical and practical understanding to bring pioneering low energy buildings from design to reality. WARM was set up in 2009 by father and daughter, Peter Warm and Sally Godber, with the aim of creating buildings with real energy savings. All our full-time staff are Certified Passivhaus Designers and our group includes chartered engineers & architectural technologists. Whilst there are only 8 of us our reach is significant in the Passivhaus World: WARM are the most prolific Passivhaus consultants and Certifiers in the UK, and winners of the 2019 CIBSE Award for Building Consultancy up to 100 employees as well as Passivhaus Designers of the UK’s best new building, winner of the RIBA Stirling prize 2019. Most Passivhaus projects in the UK have been either one-off self builds or low-rise estates for social housing, but we have been involved in nearly every Passivhaus school in the UK and the largest Passivhaus building. We also provide building services design, training, monitoring and anything else for low energy buildings that will improve the built environment. We strongly believe in disseminating information and manage the very successful Carbonlite training programme for designers and contractors as well as bespoke courses for clients.


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.




Green Building Store offers products and support for Passivhaus and low energy homes and buildings, including triple glazed timber windows and doors and advanced MVHR heat recovery ventilation, specialist airtightness & insulation products and consultancy and building services. With 25+ years’ experience of working on low energy homes and buildings, Green Building Store combines technical expertise with outstanding personal service and aftercare. Green Building Store’s construction division built the award-winning Denby Dale Passivhaus, Golcar Passivhaus and Stirley Farm EnerPHit projects, as well as numerous radical retrofits designed using the Passivhaus Planning Package. Details of these projects are outlined in various free resources available from Green Building Store’s website, including technical briefings, blogs and films.




Atkins Réalis is a world leading design, engineering and project management organisation. We connect people, data and technology to transform the world’s buildings, infrastructure and energy systems. Together, with our industry partners and clients, and our global team of consultants, designers, engineers and project managers, we can change the world. We design and deliver major projects on the built and natural environments all around the world. We believe that digitally enabled engineering has the power to radically improve the way we are all housed, connected, powered, and protected and can change our relationship with our communities and our planet for the better. Our project and programme services division can offer project and programme management, building surveying, quantity surveying and sustainability services.


Greengauge Building Energy Consultants

Bradford on Avon

Greengauge is a building & engineering consultancy specialising in sustainable, low energy design. Physics and thermal dynamics drive our philosophy and we approach our projects Fabric First to deliver buildings that are comfortable, simple and efficient. We work on new-build and existing buildings optimising insulation, fenestration and thermal bridging to produce robust buildings with minimal systems necessary to maintain comfort. We are completely independent of manufacturers, products and installers so can provide objective advice, backed up by a suite of software tools and research.




AHR creates award-winning environments that achieve their potential as original, sustainable and healthy extensions of our world around us. Architecture and building consultancy are our creative tools, sharpened with a legacy dating back to 1835 and strengthened by a partnership of diverse minds with different talents. Our inspiration comes from each other, our solutions stem from experience and our story is one we’re proud to tell, side-by-side with our clients. We empower our clients to achieve their goals in a way that is sustainable and promises to share the positive impact of place with all future generations.


Nexus Associates


Nexus provide innovative, sustainable and efficient ICT solutions integrated with the buildings they are designed for and the occupants and end-users that will use them. Our staff combined have over 250 years experience of designing, delivering and operating ICT solutions. From inception our solutions are designed to be energy efficient with minimal impact on the environment. We are an integral part of design teams with both traditional and off-site contractors, and work on a wide range of projects from offices, hotels, leisure, Civic Buildings, Student Accommodation and over one third of the DfE School Replacement Programme, Priority School Build Programme and Free School projects.


City of Edinburgh Council



Aluprof UK Ltd


Aluprof is one of the prominent European suppliers of architectural aluminium building systems for both commercial and residential building constructions. Aluprof’s product portfolio includes windows, doors, unitised systems, curtain walling, facades, rolling shutters, garage doors, framing systems and entrance doors. The vast product library of Aluprof with fire-rated and Passivhaus certifications, not only satisfies but exceeds European and UK quality requirements. Serving the UK and Ireland for over 15 years, Aluprof’s UK expert team provides professional, approachable solutions of aluminium systems to the UK and Ireland’s architecture, engineering, and construction industry. Aluprof UK is a subsidiary of Aluprof SA and a part of the Grupa Kety Group.


Max Fordham LLP

London, Cambridge, Edinburgh, Bristol and Manchester

Max Fordham is an environmental building services engineering consultancy. For over 50 years, they have engineered energy, air, light and sound to bring buildings to life. From their five UK offices they have worked with the worlds leading architects on some of the worlds greatest buildings. Max Fordhams Passivhaus portfolio includes award-winning exemplars of sustainable design and a diverse mix of beautifully engineered buildings. Having worked on some of the largest and tallest Passivhaus projects in the UK, they are comfortable delivering at any scale. They have a team of certified Passivhaus Consultants and Designers and are experienced in providing the design/planning service.


Passivhaus Homes Ltd


PHH supply a complete construction solution, PH15, for Passivhaus housing projects. PH15 covers the three essential Passivhaus elements, the thermal shell + triple-glazed windows + MVHR system. PH15 has been optimised to minimise thermal bridges, to deliver excellent airtightness, to effectively manage any overheating risk, & to keep the uplift in costs to a minimum. PH15 makes use of off-site construction methods, alongside use of natural materials that sequester carbon. For more details & example projects visit ( PHH also run an online store for Passivhaus related materials and products ( supported with good technical advice.


Morrison Construction


Morrison Construction is part of Galliford Try, one of the UK’s leading construction groups employing 3,700 people across the country. We are a people-orientated, progressive business, driven by our values to deliver lasting change for our stakeholders and the communities we work in. We are passionate about our role in providing sustainable buildings and infrastructure across Scotland, focused on the idea that what we do makes a real difference to people’s lives. We are committed to a low carbon construction future, having set ourselves challenging Science-Based Targets to achieve zero carbon in our own operations by 2030, and throughout all our activities by 2045. Our purpose, vision and values shape our culture, proactively guiding our day-to-day activities and keeping us focused on what’s important to us. Morrison Construction has fully embraced the Passivhaus standard with an ongoing commitment to upskill both its staff and the wider supply chain through initiatives such as Net Zero Partners, and collaborations with BE-ST and the Passivhaus Trust. Morrison Construction completed the first public commercial Passivhaus building in Scotland in 2021.


A. Proctor Group Ltd


The A. Proctor Group’s range of construction membranes has been designed using years of research and development to provide comprehensive protection to the building envelope from both inside and outside of the structure, also addressing the requirements of heat, air, moisture management within the building element. Based on this research, a portfolio of technically advanced specialist membranes are available, suitable for Passivhaus design. A dedicated Proctor Passive division provides unique high-performance products enabling clients to achieve best practice, effective and reliable solutions to meet Passivhaus design requirements in line with building regulations and energy efficiency. The range includes innovative solutions to simplify reducing air leakage rates, allowing specifiers to adhere to the guiding principles of Passivhaus design without compromising in other areas. Wraptite, an advanced external airtight and vapour permeable self-adhered membrane is a certified passive house component as is Procheck Adapt, a high-performance variable-permeability vapour control layer for use in a variety of commercial and residential applications




Internorm offers the most comprehensive range of bespoke high-performance, triple-glazed windows and doors in Timber-Aluminium composite, uPVC, and aluminum-clad uPVC in a wide choice of colours and finishes. As an industry leader for over 90 years, Internorms award-winning windows, large lift & slide, French and entrance doors are ideal for Passivhaus newbuild and EnerPHit projects. With exceptional thermal performance, noise reduction and enhanced security hardware, Internorm products have been used for a variety of Passivhaus buildings, including schools, offices, care homes, multi-storey buildings, as well as many private homes.Internorm offers a RIBA approved CPD ‘Windows and Doors for Passivhaus’ and expert advice from an in-house Passivhaus designer and trainer. To book the CPD, please email


Build Homes Better


Build Homes Better provides a range of high quality ICF systems for walls and foundations that can be used to construct almost any kind of building and exceed Passivhaus requirements with ease. We work with self-builders, architects, housing associations and developers to offer a simple, fast, and green construction solution for Passivhaus buildings. We also supply the industry renowned ISOQUICK foundation, described by The Passivhaus Institute as “The Optimal Thermal Bridge Free Foundation Solution”. All our products are designed to be sustainable from start to finish, meeting the needs of occupants and the environment.


Ecological Building Systems


Ecological Building Systems has been at the forefront of Intelligent Airtightness and Windtightness building product solutions and natural insulations for over a decade, gaining the sole agency in Ireland and the UK for ‘pro clima’ air & windtight products; GUTEX wood fibreboards; Calsitherm Climate Board; Diasen Thermal Plaster Systems, Thermo Hemp Combi Jute Insulation, Elka Strong Board, Finsa SuperPan VapourStop and a full range of complimentary airtightness accessories. Ecological’s products have been used in numerous Passivhaus projects in the UK and Ireland with the team able to provide technical support and guidance, particularly in the area of moisture control, maximizing building durability and occupant health. We have been providing advanced modelling for many years using WUFI as well as U Value and Dew Point calculations and we provide full on-site support.


Munster Joinery UK


Munster Joinery is a family owned Irish business which has grown from strength to strength over the past 50 years. The company manufactures windows and doors for the construction industry in timber, aluminium, aluminium clad and uPVC. We currently employ over 1800 people on our 80 acre site in Ballydesmond Co. Cork. Over the years we have expanded our market share and developed international markets. We have a 20 acre manufacturing facility in the UK employing a further 900 people. Our products are designed make sustainability, carbon neutrality and energy efficiency accessible to the as built environment. We offer eight product lines which are certified by the Passive House Institute in Germany. As well as offering energy efficient products, we tailor our operations to minimise the use of energy and water, use materials that are environmentally friendly, use recycled materials wherever possible, minimise waste and continually reduce emissions.


Tooley Foster


We are an award winning architect; creating inspirational buildings and communities for 130 years. Attention to detail is ingrained into our culture, and our first Passivhaus building (certified in 2015) was a natural extension of innovations in low energy and low carbon construction which we have been developing for thirty years. Since then we have undertaken a number of Passivhaus firsts; including the NHS’ first health centre in 2021, as well as innovative Passivhaus developments for local authorities in London and the South East. Together with Accredited Passivhaus Design (APD) we are able to offer a complete range of services in Passivhaus design, project management and certification.


Coaction Training CIC


With over 12 years experience in delivering quality Passivhaus training (previously under the Carbonlite banner), in 2022 we relaunched as Coaction Training CIC, a social enterprise driving upskilling for low-energy building in the construction industry and tackling the performance gap. Our courses are aimed at creating a broad base of knowledge for practitioners right across the industry, teaching a change of mindset as well as the technical knowledge needed, using Passivhaus as a route to excellent building performance. Our collective of trainers are all experienced practitioners at the forefront of low-energy building and design; their industry experience informs our carefully curated learning programme, bringing real-world knowledge.


Eco Design Consultants Ltd

Milton Keynes

Eco Design Consultants are an award winning Architectural Practice, lead by Alan Budden who is a Chartered Architect and European Certified Passivhaus Designer. Our ethos is to provide FUN enjoyable buildings that are highly comfortable, inherently low energy by, using its form and fabric intelligently so to insure world resources are maintained for our children. We have a number of low energy projects including new build housing, retrofit and extension of houses and community buildings.Our services also include: Architectural design, code for sustainable homes assessments, OC EPCs, LEED assessments, Renewable energy feasibilities, home energy surveys and providing CPDs.




Etude are a team of sustainability engineers specialising in low energy building design and environmental assessments. We are Passivhaus Certifiers and can help you achieve the Passivhaus standard.


Lamilux UK Ltd

Bury St Edmunds

LAMILUX are proud to introduce our Passivhaus Flat Roof Skylights and Glass Roof System – an essential feature in the design and construction of Passivhaus buildings. We understand the importance of high-quality components on Passivhaus buildings, which is why with the LAMILUX Passivhaus rooflight products, you are in safe hands in terms of energy efficiency. We currently employ 1 Certified Passivhaus Tradesperson, with 3 further members of the team working towards this award and have worked on the majority of the exemplary Passivhaus projects in the UK, including Harris Academy Secondary School and George Davis Medical Building at University of Leicester.