Ptolemy Dean (born 1968) is a British architect, television presenter and the 19th Surveyor of the Fabric of Westminster Abbey. He specialises in historic preservation, as well as designing new buildings that are in keeping with their historic or natural settings. He is best known for his appearances on two BBC television series, Restoration and The Perfect Village.
Dean is the son of Joseph Dean, a judge, and the grandson of the actor and impresario Basil Dean; his uncle is the noted musicologist Winton Dean. Ptolemy Dean grew up in Wye in Kent. One of his sisters is the artist Tacita Dean. He attended Kent College, Canterbury.
He studied architecture first at the Bartlett School of Architecture at University College London, then continued with a post-graduate diploma in architecture from Edinburgh University. At Edinburgh, Dean studied under the late late-modernist Professor Isi Metzstein, building conservation engineer and writer Ted Ruddock and design critic Mike Duriez.
Dean is a reported to be a favourite of Queen Elizabeth II, and a regular guest of the Royal Family.
After finishing his academic studies, Dean received funding from the International Council on Monuments and Sites (ICOMOS) to document mud adobe structures in New Mexico and Arizona. He then worked for Peter Inskip and Peter Jenkins Architects on a variety of Grade I listed buildings, including Stowe House, Chastleton House and Waddesdon Manor.