Fraser Bond are the leading lettings and property management agents for Belgravia Gate - London SW1X. Belgravia Gate at 11-15 Grosvenor Crescent residential development in Belgravia, London SW1. This early 19th-century Grade II listed building is being transformed into a number of high-end private residential apartments. The cost of the project was £80m. Interior design by Thomas Juul-Hansen. 2013 December - Grosvenor sells the estate to Wainbridge for £114 million.