58 Grosvenor Street Mayfair W1K Timeline News and progress updates from 58 Grosvenor Street new development in Mayfair W1K Post a new milestone BDG Sparkes Porter has office space to let at 58 Grosvenor Street. The available accommodation comprises the entire 2nd floor, which totals 1,235 sq ft (114,73m2). For... 09/11/2016 by Buildington Planning permission sought for: Display for a temporary period of six months of a non-illuminated 'to let' board on ground floor railings Source: Westminster City... 29/06/2012 by Buildington