Leconfield House, Office building in Mayfair, United Kingdom
Leconfield House is a seven-storey office building on Curzon Street with modern architectural design, located in the affluent London neighbourhood of Mayfair. The building stands out for its contemporary appearance and occupies a prominent position within this historic area.
The building served as the operational headquarters for MI5, the British intelligence service, from 1945 to 1976 during the Cold War. This period established its role as a centre for the country's major security operations.
The entrance features the sculpture 'Aspirations' by John Brown, which reflects the relationship between modern design and public space in this upscale London neighbourhood. The art installation shapes how people experience the street and shows how contemporary works are integrated into Mayfair's urban environment.
The building is located on Curzon Street and is well-served by public transport with several underground stations nearby. Visitors should note that the property is currently in private use, and access to the interior may not be publicly available.
The site was built on the foundations of Chesterfield House, a Palladian mansion constructed in 1746 for Philip Stanhope, the 4th Earl of Chesterfield. This layering of history shows how the use of a location transforms over centuries, from a classical residence to modern office space.
Location: Mayfair
Inception: 1939
Floors above the ground: 7
GPS coordinates: 51.50659,-0.15008
Latest update: December 10, 2025 15:47
Crockfords
73 m
Aspinall's
50 m
Embassy of Qatar, London
53 m
25 Park Lane
92 m
5, Stanhope Gate W1
86 m
1, Tilney Street W1
103 m
Unitag House
54 m
9 And 10, Stanhope Gate W1
106 m
21, Pitts Head Mews
71 m
81, South Audley Street W1
106 m
2, Derby Street
44 m
4, Chesterfield Gardens W1
68 m
3 And 4, Derby Street W1
49 m
2, South Audley Street W1
65 m
6, Stanhope Gate W1
94 m
Bollard, On Corner With Waverton Street, Outside Number 28
109 m
29, Curzon Street W1
60 m
2, Audley Square W1
76 m
9, Curzon Place W1
63 m
27A, Charles Street W1
104 m
28, Curzon Street W1
51 m
5, Derby Street
59 m
19, Curzon Street W1
51 m
32, Curzon Street W1
95 m
18E, Curzon Street W1
60 m
4, Curzon Square
96 m
Part Of Aspinall Curzon
46 m
Aspinall Curzon, And Stable Quarters At Rear
44 mVisited this place? Tap the stars to rate it and share your experience / photos with the community! Try now! You can cancel it anytime.
Discover hidden gems everywhere you go!
From secret cafés to breathtaking viewpoints, skip the crowded tourist spots and find places that match your style. Our app makes it easy with voice search, smart filtering, route optimization, and insider tips from travelers worldwide. Download now for the complete mobile experience.
A unique approach to discovering new places❞
— Le Figaro
All the places worth exploring❞
— France Info
A tailor-made excursion in just a few clicks❞
— 20 Minutes