Fraser Bond are the leading lettings and property management agents for Grosvenor Gardens House - London SW1W. Grosvenor Gardens House is a redevelopment of a Grade II-listed mansion block in Belgravia, London SW1. The prominent 0.57-acre freehold site comprises a substantial mansion block is overlooking Grosvenor Gardens. History Built in 1867 as one of Britain’s first serviced apartment blocks known as Belgrave Mansions, the building was converted to commercial use. 2021 February - Bain Capital Credit and CIT acquire the building from Oakvest. The site benefits from planning consent to build 42.