Fraser Bond are the leading lettings and property management agents for Empress State Building - London SW6. Empress State Building is a commercial building in South West London SW6. London’s new counter-terrorism hub. History Empress State Building was was the tallest commercial building in London until Millbank Tower was completed in 1962. 2018 March - CAPCO sells the building to the Mayor's Office of Policing and Crime for £250m. 2015 - The property is used as an office space, generating an income stream for the CAPCO Group, while the process to achieve the change in use is being implemented..