Passivhaus Affiliate

About the Passivhaus Trust

Our aims

Who is involved

What we do


The Trust is an independent non-profit organisation that provides leadership in the UK for the adoption of the Passivhaus standard and methodology. Its aim is to promote Passivhaus as a highly effective way of providing high standards of occupant comfort and health without compromising on slashing energy use and carbon emissions from buildings in the UK. Improving efficiency is crucial to meeting Climate Action Targets.

Passivhaus is the leading international low energy design standard. With over 65,000 buildings completed to this standard across Europe, it offers a robust, proven and cost-effective method to help the UK achieve its challenging carbon reduction targets for the built environment sector.

 Chris Herring, Chair, Passivhaus Trust


The Passivhaus Trust is the official UK affiliate of the International Passive House Association (iPHA.) If you join as a member of the Trust - you automatically become a member of iPHA.The Trust was founded by the AECB in 2010. AECB members are eligible for discounts on PHT membership.


Aim and objectives of the Passivhaus Trust

To provide leadership to help the whole industry to use the rigour and principles of Passivhaus to deliver high comfort, healthy, low energy buildings at scale

Objectives of the Passivhaus Trust: 01 Promote the Passivhaus standard to industry and government - 02 Help increase delivery of certified Passivhaus projects - 03 Preserve the integrity of Passivhaus standards and methodology



Who is involved

Delivery team

The delivery team reports to the Board of Directors and is supported by Passivhaus advisor and ambassador groups.

Lynn Urbanik, Marketing & Events Coordinator
Sarah Lewis, Research & Policy Director
Ysabel Legaspi, Operations Coordinator

Lynn Urbanik

Events & Marketing Associate - Scotland

Sarah Lewis

Research & Policy Director - Scotland

Ysabel Legaspi

Operations Coordinator -North West England

Bethany Okogba - Events and Marketing Coordinator
Paul Bourgeois, Associate Development Director Laura Soar, Research & Digital Associate

Bethany Okogba

Events & Marketing Coordinator - Yorkshire & the Humber

Chayley Collis

Communications Associate - Yorkshire & the Humber

Paul Bourgeois

Associate Development Director - East of England

Laura Soar

Research & Digital Associate - East of England

Jon Bootland, Chief Executive, Passivhaus Trust
Yogini Patel, Campaigns & Comms Associate
Nicci Rowland, Finance & Membership Coordinator
Kirsten Priebe, Membership Associate 

Jon Bootland

Chief Executive - London

Yogini Patel

Head of Campaigns & Comms - London

Nicci Rowland

Finance & Membership Coordinator - South East England

Kirsten Priebe

Development & Membership Associate - South West France


Board of Directors

  • Chair: Chris Herring, Green Building Store

  • Marion Baeli, 10 Design
  • Nick Grant, Elemental Solutions
  • Jonathan Hines, Architype
  • Emma Osmundsen, Sixty Bricks
  • Lynne Sullivan, LSA Studio
  • Peter Wilkinson, Ecodesign


PHT Advisors

Steering Group

Steering Group


  • Chair: Nick Grant
    Elemental Solutions
  • Matt Bridgestock
    John Gilbert Architects
  • Alan Clarke
  • Sally Godber
  • Kym Mead
    Mead Consulting
  • Rachel Mitchell
    Passivhaus Trust
  • Sarah Price
  • Kate de Selincourt
  • Mark Siddall
  • Will South
  • Gwilym Still
    Max Fordham
  • Chair: Emma Osmundsen
    Sixty Bricks
  • Alex Baines
  • Tabitha Binding
  • Fran Bradshaw
    Anne Thorne Architects
  • Julio Bros-Williamson
    University of Edinburgh
  • Joel Callow
    Beyond Carbon
  • Jae Cotterell
    PH Homes
  • Doug Drewniak
    Willmott Dixon
  • Sara Edmonds
  • Sally Godber
  • Caitriona Jordan
  • Kym Mead
    Mead Consulting
  • Gwilym Still
    Max Fordham
  • Alex Wright
    University of Bath / SCOSA
  • Alan Budden
    Eco Design Consultants
  • Jae Cotterell
    PH Homes
  • Sally Godber
  • Jonathan Hines
  • Kirsty Maguire
    Kirsty Maguire Architect
  • Harry Paticas
  • Sarah Price
  • Will South
  • James Traynor



Technical Working Groups

Several experts are invited by the Passivhaus Trust to advise on detailed technical issues pertaining to the application and delivery of Passivhaus in the UK. The Technical Panel & Patrons meet annually to explore & prioritise these issues, which informs various Technical Working Groups. 


National groups

PHT Scotland

The PHT Scotland Group's primary focus is to represent the UK Passivhaus Trust and to promote the uptake of Passivhaus in Scotland. This group also maintains correspondence with Scottish members through a Scottish Passivhaus WhatsApp group*. The PHT Scotland Group is chaired by Jonathan Hines with vice chair Matt Bridgestock.

*If you would like to join the Scottish WhatsApp group please email


The Passivhaus Trust is part of the Sustainable Development Foundation Alliance, which has helped support PHT's development.

The Trust works closely with Passive House Plus magazine, which PHT members receive through a free digital subscription.