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Click for our sustainability credentials. Sustainability forms the foundation of who we are.


ECD Architects has been a pioneer in Sustainable Design for over 40 years. Our objective is to design high quality sustainable buildings that have a positive impact on their community and their environment. Sustainability is integrated into our designs from concept through to completion, and we make sure this is reviewed at every RIBA work stage.

As part of our response to the Climate Emergency we have signed up to Architect’s Declare, the AJ RetroFirst Campaign and the RIBA 2030 Challenge. WWe have created a 5 year plan setting out how we will change the way we work to meet these commitments.

Our team of qualified Passivhaus designers in London and Glasgow have experience designing low energy retrofits and new buildings. Our fabric first approach allows such a reduction in heat demand that it is possible to achieve net zero carbon buildings, while also improving indoor health for occupants.

For all of our clients, we provide an initial, free-of-charge, Passivhaus analysis at feasibility stage to enable them to make an informed choice.

Our services:

  • Integrated Passivhaus / EnerPHit Design (with or without certification)
  • Retrofit Coordinators & Designers
  • Passivhaus Consultancy
  • Environmental Consultancy and Sustainability Statements
  • Embodied Carbon / Lifecycle Assessments
  • Post Occupancy Evaluations and Building Performance Monitoring
  • Soft Landings services

ECD Architects are certified by ISO 9001 and ISO 14001, to ensure our quality and environmental working standards.


Office Information


ECD Architects are a founding partner of the Passivhaus Trust.

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Sustainability Plan

We have a 5 year plan to achieve our commitments to both the RIBA 2030 Challenge and Architects Declare.

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Wilmcote House

Award winning residential retrofit to the Passivhaus EnerPHit standard in Portsmouth

Project Example


A deep retrofit of an existing 4-storey block with a rooftop extension and adjacent new build to Net Zero Carbon.

Project Example

Thornhill School

New build Passivhaus school facility expanding the school from a 1 FE to a 3 FE in Central Bedfordshire

Project Example

Springwell Brae

11 zero-energy new build Energysprong homes on a greenfield site in the Scottish Borders

Project Example