The Beecroft Building provides world-class research facilities, consolidating experimental and theoretical physicists into a single centre of excellence. Sited in a highly sensitive and constrained site in central Oxford, the building is a landmark within the wider university context. Completing the existing physics complex within the Science Area, the new building sits on a very high-profile site at the entrance to the University Parks, opposite Sir William Butterfield’s grade I listed Keble College Chapel. The building unites researchers and fosters collaborative working in a visually connected yet acoustically controlled environment. Offices and collaboration spaces are organised above ground around a five-storey atrium. Below, a 16-metre-deep complex of high-specification laboratories can maintain temperature to within a tenth of a degree, and reduce vibration to the width of a few atoms, enabling previously impossible experiments.