Fraser Bond are the leading lettings and property management agents for Blakes Hotel Grosvenor Square - London W1K. The new Blakes Hotel Grosvenor Square development at 22 Grosvenor Square in Mayfair, London W1. The new hotel will have around 30 rooms, a restaurant and private members' bar. History 1970 - The building contained 9 flats according to The Estates Gazette, Volume 215. 1727 - Originally developed as two terrace houses no.19B and 20 Grosvenor Square, which were later numbered no. 22 and 23. 43 North Audley Street was first occupied by the mews stable block to the rear of No 19B. References: 1..