Passivhaus Affiliate

Members: Engineers

Build Collective



Building Energy Physics Consulting Ltd


Created in 2016, BEPC provides building physics consultancy across the construction industry, promoting a ‘fabric first’ approach, enabling the creation of healthy, comfortable and energy efficient buildings. With over ten years of building physics and project management experience, we work with architects, product manufacturers, façade & energy consultants and house-builders. We offer consultancy in relation to: Thermal bridging analysis; Condensation risk, including WUFI analysis; Fenestration U-values, and; and whole building Energy modelling.


Cambridge Architectural Research



Newcastle upon Tyne

Julian is a chartered building services engineer and Fellow of CIBSE with a specialism in sustainable/environmental building design, client design advice and low carbon master planning. He has 27 years of experience. Projects include the Royal Ontario Museum in Toronto, Tower Place in London, the Parkview Battersea Power Station scheme. He has recently completed his own certified Passivhaus in Hampshire and is a regular judge for the Construction News Awards and the RIBA sustainable building award. In 2016 he chaired the UKGBC task group – delivering Building Performance.


David Cameron


Design Engineering Workshop




Ecospheric specialises in sustainable property development and consultancy. Our focus is on pioneering eco projects that not only save carbon but also drive technological change. Our current pilot projects include the first European passive house plus retrofit of 2 luxury Victorian semi-detached homes, Designing what could be the first Zero waste and Zero energy food hall in the world. Development of the first all electric, petrochemical free construction system for passive house social housing.


Enhabit Ltd


Enhabit uses fabric-first building physics principles to design and build living spaces that are comfortable, healthy, energy efficient and easy to maintain. As a team of engineers, project managers and passivhaus designers, Enhabit uses engineering and building physics to help our clients in building their dream home, on time and on budget. We have a trusted network of building contractors, ventilation, heating and solar technicians, architects and structural engineers to help design, install and commission our building systems. Our extensive product range includes MVHR, solar PV and thermal, air and ground source heat pumps, heating systems, airtightness, insulation and more.


Gale & Snowden Architects Ltd

Gale & Snowden Architects Ltd are an award winning practice that provides an integrated approach to low energy and environmental responsible building and landscape design. This approach involves an in-house fully integrated design team of building and landscape professionals who specialise in ecological design including: architects, mechanical engineers, landscape, permaculture and certified Passivhaus designers. Gale & Snowden have undertaken exclusively low environmental impact design since 1992 and as a result we have a wealth of experience and a quality portfolio of buildings demonstrating healthy, passive design and very low energy buildings that are practical to build, run and work properly.


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.


Hamson Barron Smith Ltd


NPS is a national property consultancy with 28 offices across the UK. Working in both the public and private sector, we have extensive experience of designing, adapting and procuring an extensive range of properties. We aim to deliver innovative and sustainable solutions to our clients and offer a complete turnkey solution: design - development - construction. Our projects are about future-proofing each new community and environment by reducing the overall energy demand and carbon footprint. Our benchmark is to raise the bar in providing sustainable homes by deploying Passivhaus principles and standards.


Leeds Environmental Design Associates Ltd (LEDA)

West Yorkshire

LEDA was formed in 1997 as a multidisciplinary partnership of design engineers and architects committed to creating sustainable, environmentally friendly buildings. We use our construction experience to make your plans practical and usable. As a firm driven to create buildings with low energy performance that are also healthy and comfortable, we are proud that LEDA can now offer a fully-coordinated building design including static and dynamic thermal modelling, designPH, Passive House Planning Package and Therm modelling. We recently augmented our Passive House capabilities, welcoming Richard Spencer, engineer and sustainability specialist, to the team. Richard completed the AECB Carbonlite Retrofit course in 2016 and became a Certified Passive House Consultant in 2017. Richard will be working with James Clifford, our Architectural & Environmental Design Assistant, and the LEDA team to further support architects and clients with the designs for Passive House and near passive house buildings, including renewables, heat supply and distribution systems, water and electrical services, lighting, and communications.


Legacy Structural Design


Liz Meddings


Max Fordham LLP


Max Fordham LLP is an environmental building services engineering consultancy, who work as both services consultants and Passivhaus designers. For over 50 years, we have engineered air, light, sound and energy to bring buildings to life. Sustainability was a founding principle of Max Fordham and it remains one of our core values. Many of the solutions used in a Passivhaus building already form part of our general approach to environmental design. Our portfolio includes exemplars of sustainable design and a diverse mix of beautifully engineered buildings, including the Agar Grove development in London.


PK Property Limited


P K Property is a small property company based in Douglas on the Isle of Man. The company is run by Paul and Katherine Bergin. We both have a long standing interest in Passivhaus and have recently bought a site on the Island where we hope to build a Passivhaus for ourselves. Paul is a chartered civil engineer with significant experience of building. Katherine worked in the UK electricity industry prior to moving to the Island.

Rimes Solutions

Newcastle upon Tyne

Steve Connor


Warm: Low Energy Building Practice



Will Rudd Davidson Ltd

Edinburgh and Glasgow

Will Rudd Davidson provides Civil, Structural and Conservation Engineering and Construction Consultant Services from Concept Design to Completion. We provide an exemplary service, and aim to exceed all expectations making the journey as seamless as possible. With main Offices in Edinburgh and Glasgow, we deliver Civil and Structural Engineering services across a wide spectrum of sectors throughout Scotland and across the UK. We are skilled at providing cost effective, practical and elegant solutions. We thrive on Problem Solving, providing robust solutions to challenging briefs. Whether in City Centre gap sites, Buildings at Risk, poor ground conditions or marginal plots of land, we will add value.