In 1976 he co-founded architecture practice CZWG, where he was a partner (1976-1986).
He later established Lake Estates Ltd (1982); Charterhouse Estates Ltd with the Water Authorities Superannuation Fund WASF (1986–1990); and Solidspace (2003-ongoing), an independent developer.
He was Director of the Infrastructure and Development course at the London School of Economics (1998-2003).
He was appointed the Royal Academy of Arts’s Honorary Surveyor in 2015.
He is a Fellow of the UK Royal Society of Arts.