Till worked for relatively low-key architectural practices, Alex Gordon Partnership and Peter Currie Architects, before joining his partner, Sarah Wigglesworth, to design and build their well known house and office, 9 Stock Orchard Street, which was featured on the first series of the TV ProgrammeGrand Designs; subsequently the presenter Kevin McCloud named the project as one of his favourite projects. The building, made from straw bales and other unconventional materials, was awarded Civic Trust Award, RIBA National Award and RIBA Sustainability Prize. It has been published extensively worldwide, with the journal World Architecture saying: "It is destined to become an icon, the subject of dissertations and copycat projects. Unlike the established canon of exemplary houses, this house/office is a deep, dense and determined essay on the question: what is architecture today?" He left Sarah Wigglesworth Architects in 2002 to concentrate on an academic career. Till curated the British Pavilion at the 2006 Venice Architecture Biennale. the exhibition, entitled Echo City received very mixed reviews, with severe criticism from the London architectural press, but praise from international reviewers. He chaired the RIBA Awards Panel from 2004–6, the only academic to have held this position. In 2013 he co-curated the UK Pavilion at the Shenzhen Biennale with a team from Central Saint Martins, for which they were awarded the Biennale's Academic Committee Prize.
Till's research and writing has concentrated on the social and political aspects of architecture and the built environment. Stephen Moss writes in the Guardian that, "the appeal of Till's thinking is that he starts with people rather than structures, and asks us not to venerate buildings but to occupy them." His best known book is Architecture Depends, which was widely reviewed, and praised by the Times Higher as "a brave, enjoyable, affirming and important book." Other books include Flexible Housing and Spatial Agency All three of these books were awarded the RIBA President's Award for Outstanding University-based research, making Till the only person to have received this international honour three times. In addition to these books, Till has written numerous articles, which are collected together on his own website. His most recent research concerns issues of scarcity and creativity in the built environment, funded by HERA. It has been commented that his privileged Eton and Cambridge background is at odds with his later left-wing political views.
Personal life
Till is the son of the educator and former cleric Barry Till and the long-term partner of the architect Sarah Wigglesworth, a pair called by the Evening Standard "a glamorous power couple." His interests are listed in Who's Who as 'growing, cooking and eating food'. He lives in London. In 2015 he was appointed a trustee of the New Economics Foundation.