Peter Clegg established the Architectural practice Fielden, Clegg, Bradley Studios with Richard Feilden in 1978.

Regarded as a pioneer in environmental design, he has over 40 years' experience in low energy architecture and is active in research, design, and education. Peter works primarily in the education and cultural sectors. He has led projects at Yorkshire Sculpture Park, London’s Southbank Centre, Brighton Dome and the Leventis Gallery in Cyprus. His involvement in schools and higher education projects includes a new School of Engineering in Toronto and an Academy in Bangladesh.

He is Chair of the RIBA research awards and the Design South West Review Panel, holds a professorship at Bath University, chaired the RIBA Awards Panel 2013/14, and in 2010 was made an RDI. Peter has been a YSP Trustee since 2008 and its Chair since 2019. He is also a member of the People and Governance committee.