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30 Grosvenor Square.

Originally designed by Eero Saarinen, 30 Grosvenor Square was the US embassy in London from 1960, but following the embassy’s relocation in 2017, the site is now being transformed into a luxury hotel.

Conversion of a historic US Embassy in London into a luxury hotel

Location
London
Client
Qatari Diar
Architect
David Chipperfield Architects
Project Value
Confidential
Floor Area
45,000 m²
Status
On-site

The existing Grade II-listed building is six storeys – rectangular in plan up to level two and C-shaped above — and has a two-storey basement. Its key historical elements are to be retained, including the stone façade, the level two diagrid floor and perimeter cruciform columns.

Plans comprise the addition of a new floor as a rooftop pavilion, two new basement levels and significant improvements to the façade and public realm. At the rear, the C-shaped floors will be extended.

Access to the ground floor retail will be improved by the removal of the glacis around the building’s perimeter. At first floor, the heart of the hotel, there will be a restaurant, lounge space, meeting rooms and event spaces, all organised around the central hotel lobby. A key feature of this area is the diagrid floor; this will be retained, requiring modification and remedial work in places. It will also be extended to the rear to establish the first floor as a continuous and coherent space.

The building’s current C-shaped plan limits the proportions of the proposed hotel rooms, so an extension is proposed at the rear. A new core layout will allow for a plan that could accommodate hotel rooms and suites of adequate depth, whilst a central atrium with circulation spaces allows daylight to penetrate deep into the building. The new rear façade will incorporate a narrow balcony zone.

The existing façade is a series of alternating O-shaped frames faced with Portland Stone. Some areas will be repaired, and it will also be shifted from supporting the floors, to just supporting its own weight. There will also be a new façade in multiple locations, particularly from ground to diagrid and from sixth floor up.

Arding
&
Hobbs.
 
Grosvenor
Square.
 
 
Horizon
 
Building.
 
Canada
Water
Plot K1.
 
Cadogan
Place.
 
 
CASPAR
I.
 
 
Kivik
Pavilion.
 
 
One
Centaur
Street.
 
Nike
myThread
Pavilion
 
Museum
of the
History of
Science.
2-12
Symons
Street
 
Southwark
Gateway.
 
 
Brindleyplace
Café
 
 
Queen
Mary
Students'
Union.
30
Kensington
Church
Street
Brulington
Danes
Imaging
Centre
Bedford
Music
School
 
Royal
Holloway
Student
Residences.
Howe
Dell
Primary
School.
39-49
Wigmore
Street
 
1
Finsbury
Square
 
London
Bridge
Glass
Sculpture.
Hilton
London
Tower
Bridge.
Bishop Challoner
Catholic Collegiate
School.
 
Butterfield
Innovation
Centre.
 
Hanover
Street
Artwork.
 
Derby
Quad.
 
 
Queens
Apartments.
 
 
AA
Rainforest
Pavilion.
 
Qasr
Al
Muwaiji