Leconfield House, Office building in Mayfair, United Kingdom
Leconfield House stands seven floors tall on Curzon Street, featuring a modern architectural design within the upscale Mayfair district of London.
The structure served as the operational headquarters for MI5, the British Security Service, from 1945 until 1976 during significant Cold War operations.
The property includes the sculpture 'Aspirations' by John Brown at its entrance, with a smaller version displayed in the building foyer.
Recent plans submitted to Westminster Council propose converting the building into a hotel with additional basement levels and updated facades.
The site previously housed Chesterfield House, a Palladian mansion built in 1746 for Philip Stanhope, the 4th Earl of Chesterfield.
Location: Mayfair
Inception: 1939
Floors above the ground: 7
GPS coordinates: 51.50659,-0.15008
Latest update: March 6, 2025 06:34
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