Passivhaus Affiliate

Standard Members

James Galpin

Tunbridge Wells

James Galpin of Hazle McCormack Young LLP is a PassivHaus Trust member and a designer of low energy solutions for new contemporary homes, education buildings and offices, as well as retrofit projects in all three sectors. Working closely with specialist Phil Neve of Aaben, James has recently delivered a new 6 bedroom PassivHaus dwelling in Mayfield (completed August 2014) and has designed new dwellings for three sites in East Sussex, plus retrofit dwellings in Kent. In addition to designing bespoke projects for individual clients, James is also working on theories to develop the concepts of PassivHaus further to find new ways of collecting and harnessing solar energy in a controlled manner to benefit education spaces and office developments. James primarily covers the South East of England from two offices in Tunbridge Wells and Canterbury, but is happy to travel further afield for interesting projects.


JDA Architects


JDA Architects design and deliver pioneering schemes for private clients and housing associations nationwide. We work with our clients, partners, the HCA and Local Authorities to improve the quality of housing through design and innovation. UK Over 50s Housing Awards – Nominated for 2015 BREEAM 2015 Industrial Building of the Year WINNER Best Residential Architects Practice 2015 WINNER Wigan Business Awards Environmental Technology Award WINNER BREEAM 2013 Industrial Building of the Year WINNER North West Regional Construction Awards Sustainability, Our Legacy WINNER North West Regional Construction Awards Project Of The Year For Lancashire WINNER RICS Awards Design and Innovation Nominated


Jevie Ltd


Jigsaw Design & Construction Ltd



Jim Miller Design Ltd


Jim Miller Design Ltd is a leading architectural practice based in Brighton and Hove, Sussex specialising in sustainable buildings from its inception in 2003 and now working exclusively to Passivhaus standards. Projects range from deep retrofits / EnerPHit to small housing projects with long standing relationships with local contractors proficient with Passivhaus builds. Jim Miller is a certified Passivhaus Consultant and oversees every aspect of the project ensuring excellent attention to detail throughout.


JL Studio


JL Studio is the architecture practice with a creative, collaborative and sustainable approach to design. Joanna Lindley, founder of JL Studio and The Eco Architect blog, is a RIBA Chartered Architect and Certified Passivhaus Designer. It is her belief that Passivhaus should be the standard of choice for construction projects so that energy efficient and comfortable homes are made available to everyone. She has experience in designing a number of residential projects to the Passivhaus standard and strives to maximise the sustainable potential of all her designs.


John Gilbert Architects


John Gilbert Architects is a Scottish design studio, passionate about designing places for people and the planet. We deliver beautiful, efficient, affordable projects designed with users, residents and the community. We undertake design work from a strategic level to detailed architecture with creativity, enthusiasm and knowledge.


John Pratley


John Pratley is an experienced designer with over 20 years commitment to creating and delivering sustainable architecture and masterplanning environments; with particular interest in social, community responsibilities and energy-efficient, ecological design. He is a Certified European Passivhaus Designer. John is currently leading the design delivery for Gardner Stewart Architects of the Passivhaus EnerPHit Retrofit of over 100 social housing flats within the eleven-storey Wilmcote House tower block in Southsea, Portsmouth. Website:

Jon Broome Architects


Award winning practice building on 20 years of experience of ‘green’ design to incorporate affordable and trouble-free measures into the mainstream. • Designing very energy efficient buildings using Passivhaus principles • Building sustainable homes and neighbourhoods • Developing sustainable policies and briefs • Advising on sustainable construction, specifications and suppliers We bring together theory and practice to create environmentally sustainable and cost-effective housing. We have particular experience and expertise in self-help housing and timber building We believe in adaptability and a proper role for residents as necessary conditions for sustainable development


Jon Hand


Jon Hand is a certified trainer for Passivhaus workshops and has taken part in eight workshops with over 200 participants within the University of Strathclyde in Glasgow as well as advising several groups in South Korea on PH issues. When not involved in PH activities Dr. Hand develops and deploys detailed numerical analysis tools and techniques within the Energy Systems Research Unit of the Department of Mechanical and Aerospace Engineering. For two decades he was also a registered Architect and continues to be shocked by the designed-for-failure he sees in many conventional construction documents.

Josko Fenster und Turen GmbH

Kopfing, Austria

Josko was founded in 1960 by KommRat Johann Scheuringer, as a classic joiner‘s workshop. As early as 1970 the company began to specialise in windows and doors. Josko has this entrepreneurial vision to thank for its development into one of the leading brands in the industry. The Josko products are manufactured at the two centres of Kopfing and Andorf in the Upper Austrian Inn District. Today Josko’s core business lies in the manufacture and marketing of windows and doors of wood, wood/aluminium, composite/aluminium, plastic and plastic/aluminium in the high-end quality segment. Behind the stringent quality demands stands a Josko manager in each area of competence. At Josko all the divisions are given top priority.


Julia Szierer


Julian Sutherland

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.