J Sainsbury Developments has appointed Chetwood Associates to redesign its Edinburgh House offices in Lambeth, south London. The £7m refurbishment will double the height of the lobby area and involved the installation of new floor-to-ceiling glazing on the building's envelope. Contractor is Jarvis Newman, project manager is RGCM, QS is Henry Riley & Son, M&E is Roberts & Partners, structural engineer is Gary Gabriel Associates and landscape architect is Barry Chin Associates.