Fraser Bond are the leading lettings and property management agents for 10 Grosvenor Street - London W1K. 10 Grosvenor Street is an office building in Mayfair, London W1. Developed in a joint venture between Hammerson and Grosvenor, this six-storey 60,000 sq ft prime office building was completed in December 2003. It houses Hammerson's headquarters with Associated British Foods occupying the top two floors of the building and hedge fund manager LDFM, the third floor. The scheme includes 570m2 of retail space on the ground floor. Tenants - Sophia Contemporary Gallery opened here in March 2016. The.