Fraser Bond are the leading lettings and property management agents for 25 Buckingham Gate - London SW1E. 25 Buckingham Gate is a residential building in Victoria, London SW1. A former office building is converted into a mansion block. The development comprises 23 apartments with interiors designed by March and White. History Demolition works for Eggington House at 25-28 Buckingham Gate commenced in 2015. 15. April 2015 - Planning permission granted for: Demolition of existing office building and redevelopment to provide a replacement building over two basement levels, lower ground, ground and eight.