PHT welcomes our NEW Co-Directors!
Please join us in welcoming the newest members of the Passivhaus Trust delivery team!
Ann-Marie Fallon, joins us as our new Co-Director to support the crucial role of the Trust’s ambitious goal to accelerate the adoption of Passivhaus in the UK.
 |
|
I am excited to take up this critical role at the Passivhaus Trust. It is at a seminal moment globally, but also for the Trust in terms of leadership evolution and vision. The targets of 10% for all new buildings including retrofit to be Passivhaus and for 50% of industry practitioners to be trained up really excite me: it’s a step change in ambition for the Trust. It will be exciting to make the next leap in legitimacy, relevance and scale: a new era. Let’s get on with it! Ann-Marie Fallon, Passivhaus Trust Co-Director |
As a Director at PHT Patron Architype, Ann-Marie is one of the UK’s leading experts on Passivhaus design and has shared her experience at UK and international Passivhaus Trust conferences. Ann-Marie has successfully delivered the award-winning and UK’s largest Passivhaus residential scheme, Agar Grove and is overseeing the delivery several primary and secondary schools within Scotland. She was involved in quality and technical design reviews for the UK’s largest Passivhaus secondary school, Harris Academy Sutton, the UK’s first Passivhaus Plus school, Hackbridge Primary and the UK’s first Passivhaus Plus office, Bicester Eco Business Centre. Ann-Marie also brings expertise in EnerPHit, the Passivhaus standard for retrofit, having delivered the first EnerPHit in Ireland in 2011. Ann-Marie will have a continuing role at Architype, linking the Trust into their leading-edge research work.
In addition to her new position within the Trust, Ann-Marie has always had an interest in giving back to architectural education. She is a part-time teaching fellow at the University of Bath, and also visiting Part III External Examiner for the Technical University of Dublin and The Bartlett School of Architecture UCL London.
Ann-Marie has exceptional vision and ability, underpinned by unrivalled technical expertise. The Passivhaus Trust is delighted to be working with our new Co-Director as we move forward in our journey and in promoting and delivering Passivhaus across the UK.
Promotion for Sarah Lewis
The Trust would also like to congratulate our Research and Policy Director Sarah Lewis who has been promoted to Co-Director of the Trust, and will work alongside Ann-Marie. An architect, author and Passivhaus consultant, many of you will know Sarah from the extensive range of Passivhaus Masterclasses, presentations and publications she has been directly involved in, including the best-selling book ‘PHPP illustrated’, a complete user guide to the Passivhaus Planning Package tool. The book is currently being updated for its third edition, which is available for pre-order through the RIBA online store.
A leading advocate for sustainable architecture, Sarah has been at the forefront of delivering and shaping Passivhaus in the UK for over a decade. Her project experience includes London’s first Passivhaus home (2010), the multi-award-winning Carrowbreck Meadow residential development and early-stage strategic design work for St Sophia’s Primary School EnerPHit (completed 2025), the first of its kind in the UK. Sarah is also a Passivhaus trainer with Coaction, supporting the next generation of designers and contractors.
Recognised as Sustainability and Environmental Woman of the Year at the European Women in Construction and Engineering Awards, Sarah also sits on the Scientific Advisory Board for the International Passivhaus Conference (2023 & 2025), contributing to global knowledge exchange on low-energy building. With Passivhaus going from strength to strength in the UK, Sarah will play a crucial role in steering the future development of the Trust and the delivery of Passivhaus buildings on the path to net zero.
Together, Ann-Marie and Sarah have exceptional vision and ability, underpinned by unrivalled technical expertise. The Passivhaus Trust is delighted to be working with our new Co-Directors as we move forward in our journey and in promoting and delivering Passivhaus across the UK.
Further Information
Passivhaus Trust - who is involved?
Passivhaus training & education
Passivhaus for Educational Buildings
PHPP Illustrated - pre-order now.
20th August 2025
Get involved with the UK Passivhaus community
 |
 |
 |
 |
