Fraser Bond are the leading lettings and property management agents for 21-23 Farm Street - London W1J. 21-23 Farm Street is a residential building in Mayfair, London W1. Built in 2019 on the site of a post-war redevelopment. History Farm Street was a part of Berkeley Estate and was laid out by 1740.[1] 2017 February - work commenced on site. 2016 April - Planning permission for the demolition of the existing four storey building, retention of existing basement level and erection of new four storey building comprising a street cleansing depot at ground and part first floor levels and 14 affordable.