Fraser Bond are the leading lettings and property management agents for Willis Building - London EC3M. Willis Building is a 28-storey office building in the City of London EC3. The Willis building is one of the City’s most iconic developments. Designed by architect Norman Foster, the Willis Building is located in the centre of the City opposite the Lloyd’s Building. It is one of the tallest buildings in the City, with 45,615 sq m of space on 29 floors, together with a 10-storey building on 25 Fenchurch Avenue. Designed by world-renowned architects Foster + Partners, The Willis Building won.