Peter is Board Chair at The Townscape Consultancy. He qualified as an architect after studying at the University of Cambridge and the Polytechnic of Central London. He spent 15 years working in practice in central London, during which time he was responsible for a number of large office and residential projects
In 1997 he was appointed Deputy Secretary of the Royal Fine Art Commission and in 1999 joined the newly formed CABE (now Design Council CABE). Until 2005 he was Director of CABE’s design review programme, which provided expert advice on major development proposals across England. Between 1997 and 2005, his work at the RFAC and CABE involved him in advising on many of the most significant projects in the country. He was the author of a number of CABE publications, including Design Review, which set out its method of assessing projects. With colleagues at English Heritage, he drafted the first edition of the CABE/EH Guidance on Tall Buildings.

In 2005 he founded Peter Stewart Consultancy, which grew to become one of the leading townscape consultancy practices in London before becoming part of The Townscape Consultancy in 2021.

He is also a director and trustee of MOLA (Museum of London Archaeology), and a trustee of the National Archives Trust.

Major projects on which he has advised include: Chelsea Barracks, City of Westminster (Qatari Diar); Fitzroy Place, City of Westminster (Exemplar); Southbank Place, London Borough of Lambeth (Canary Wharf / Qatari Diar); 120 Fleet Street, City of London (Chinese Estates Holdings); The Post Building, London Borough of Camden (Brockton Capital and Oxford Properties); South Quay Plaza, London Borough of Tower Hamlets (Berkeley Homes).