Fraser Bond are the leading lettings and property management agents for No. 1 Grosvenor Square - London W1K. No. 1 Grosvenor Square is a residential development on Grosvenor Square in Mayfair, London W1. The office to the residential scheme by Lodha Group created 44 apartments over 7 storeys, as well as parking at basement level. New Apartments For Sale Studios, 1, 2 and 3-bedroom apartments for sale. 39 apartments and 5 duplexes. Amenities - 24h staffed (St Amand) lobby - 25-metre swimming pool - 3 Private Treatment Rooms - Two private dining rooms for 12 guests individually, or up to 36 when the.