Marion is an award-winning architect and author who specialises in low energy design and retrofit. With sector experience in housing, from prime to affordable, and workplaces, she has designed and delivered many large scale, complex projects. Marion’s retrofit work includes Princedale Road, which was the first certified Passivhaus retrofit in the UK, the Garrison Chapel, Eighty Strand (formerly Shell Mex House) and Claridge House. She was also the architect for the new townhouses at Chelsea Barracks.  Her book ‘Residential Retrofits: 20 case studies’ is described as ‘an invaluable text for those working in residential retrofit’. Marion is frequently invited to speak about retrofit at industry events, is an NLA Net Zero Expert panel alumni member, board director of the Passivhaus Trust and an architecture awards judge.