4 Cowley Street

4 Cowley Street
Location in London
General information
Address	4 Cowley Street
Town or city	London
Country	United Kingdom
Coordinates	51°29′51″N 0°07′38″W / 51.497363°N 0.12721361°W / 51.497363; -0.12721361
Construction started	1904
Completed	1905
Design and construction
Architect(s)	Horace Field

4 Cowley Street is a Grade II listed house in Westminster, London SW1. Previously the headquarters of the Social Democratic Party and the Liberal Democrats, it is now a residential building.