Fraser Bond are the leading lettings and property management agents for Featherstone Building - London EC1Y. The Featherstone Building is a new commercial development next to Old Street station in London EC1. The new building will comprise 125,000 sq ft of offices and retail. History 2016 February - Planning permission granted for a 125,000 sq ft office development - an 81% floor area uplift. The development will replace two tired properties totalling 69,000 sq ft, which in 2017 were let in a short-term basis. One of the buildings demolished is Monmouth House - a 3,900m2 office building from the 1960s.