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London Marriott Hotel Grosvenor Square

Grosvenor Square, London, W1K 6JP

237 Guest Rooms 11 Meeting Rooms 900 Meeting Capacity

Ideal for large conferences with it's impressive capacity.
Located in Mayfair at one of London’s most desirable addresses.

It features Gordon Ramsay steakhouse dining in the Lucky Cat Bar and The Luggage Room Bar. The hotel is known both for its prime location and its historic feel.

Modern event rooms benefit from high-speed Wi-Fi and cutting-edge audiovisual services.

It has 11 event rooms with 12 breakout rooms. With a detailed Meeting Impact Report and the ability to select a climate action project to support, your event can be both extraordinary and climate-conscious.

The Westminster Ballroom is a spacious, pillar-free venue designed for seamless events. With an impressive 12.8 ft (3.9 m) ceiling height, it easily accommodates stages, large screens, and dynamic setups—perfect for awards ceremonies, conferences, weddings and gala dinners. It offers a flexible partition for customised layouts, while the adjacent Whitehall Suite serves as an ideal reception.

Function Room	Size in SQ/M
Whitehall Suite	186					90	558
St James	42.5	16	24	36	16	24	40
Mayfair 1	50	18	20	35	18	30	40
Mayfair 2	50	18	20	35	18	30	40
Mayfair 3	50	18	20	35	18	30	40
Mayfair 4	50	18	20	35	18	30	40
Hanover	57	24	36	54	18	36	80
The Berkeley Suite	58	24	30	60	16	26	100
St James & Hanover	100	15	65	95	38	80	160
Mayfair 1 & 2	9.4	36	40	70	36	60	80
Mayfair 1,2,3	14	54	60	105	54	90	120
Mayfair 3 & 4	18.7	36	40	70	36	60	80
Mayfair Suite	206	72	80	140	70	120	170
Chester Room	221	84	84	120	70	90	180
Eaton Room	236	80	96	160	80	130	200
Belgrave Room	300	120	120	300	70	140	250
Chester & Eaton	458	240	216	390	80	250	450
Belgrave & Chester	243	280	288	480	110	312	600
Westminster Ballroom	763	360	384	900	140	580	900