Fraser Bond are the leading lettings and property management agents for 10 Portman Square - London W1U. 10 Portman Square is a new building with 113,000 sq ft office and 20,000 sq ft of retail space in Marylebone, London W1. In April 2010 British Land bought 2-14 Baker Street in the West End for £29million. Planning consent was granted in 2009 for 139,000 sq ft of office space with retail units at ground level. The new nine-storey rectangular building will have a central core with natural light on all four sides. All of the office floors will be totally column-free, and they will range in size.