Speakers

Alexander Buck is Head of Sustainability and a Certified Passivhaus Designer at Buckley Gray Yeoman (BGY), where he has been a driving force for over eight years. With a passion for regenerative design and a strong commitment to a Retrofit First approach, Alex is dedicated to reducing the climate impact of the UK’s built environment. He embeds innovative, people-focused sustainability strategies into design-led architecture, ensuring environmental performance is considered at every stage.

With more than a decade of experience in the built environment, Alex has led multidisciplinary teams across all RIBA work stages, delivering a wide range of projects, from conservation-led refurbishments like Bedford Row to major commercial retrofits including 2 Gresham Street, 206 Marylebone Road, and Broadgate Tower. His work consistently balances technical performance with design excellence, pushing the boundaries of sustainable practice.

A committed advocate for the circular economy, Alex specialises in upgrading the thermal performance of existing building fabric to significantly reduce both operational and embodied carbon. His approach prioritises the reuse and enhancement of what already exists, aligning environmental responsibility with architectural integrity.

Beyond his role at BGY, Alex’s expertise has been recognised through his role as a judge for the AJ Architecture Awards 2025 and the AJ Retrofit Awards 2024. He has spoken at the London Build conference about Passivhaus design and has been featured in the media, including articles for The Independent, Architects’ Journal, and Architecture Today. He also enjoys contributing to sector-wide knowledge sharing, from speaking at industry events such as BCO Next Gen Talks to engaging with industry campaign groups including Don’t Waste Buildings and The Alliance for Sustainable Building Products (ASBP) on the barriers to resource reuse and material passports.