Fraser Bond are the leading lettings and property management agents for 50 Finsbury Square - London EC2A. 50 Finsbury Square is an office building in London EC2. Great Portland Estates is refurbishing the 127,500 sq ft building. The new development will comprise 118,000 sq ft offices and 9,500 sq ft retail. History The building was designed by Foster + Partners and completed in 2000. 2020 December - Work starts on major office refurbishment at 50 Finsbury Square (129,100 sq ft). 2020 July - Great Portland Estates is preparing for the redevelopment. Work starts in early 2021. 2020 - Planning.