Grosvenor Square, London W1K 6JP United Kingdom
+44 20 7493 1232

Organize a meeting or event

Send your requirements to our expert planners for more information on pricing and room availability.

  • 13

    Event Rooms

  • 2,273 sq m

    Total Event Space

  • 1,000

    Capacity Largest Space

  • 12

    Maximum Breakout Rooms

About This Venue

  • Our 5-star hotel offers 15 meeting rooms for hire in the upscale Mayfair neighborhood of London, UK

    Learn more
  • Throw a corporate gala or host a conference for 1,000 guests in our Westminster Ballroom in Mayfair

  • Consider our more intimate meeting rooms and venues for board meetings and small cocktail parties

  • Set the stage for success in our conference rooms with high-speed internet and audiovisual services

  • Embellish your conference with a banquet, themed break or afternoon tea by our culinary staff

  • Search, view, book and pay for meetings in Mayfair, London of up to 30 people within 90 days online

Plan an Inspired Event

Image See What’s Possible
See What's Possible.

Search our event ideas online with inspiring event photos, tips and layouts - specific to this hotel.

Attendee Booking Tools

Image Attendee Booking Tools

We can provide you with a unique complimentary Reservation Link that makes it easy for your guests to reserve their rooms.

  • Shared in an email
  • Embed in a website
  • Personalized with your group name, event dates, hotel, and special rates
  • Displayed in multiple languages on Marriott domains worldwide

Manage Your Event with Ease

Image Manage Your Event with Ease
Keep Your Event in Hand.

Manage event details, make real-time requests and connect with our staff - from the palm of your hand.

Group Lists

If you have a list of your guests, we can make reservations for all of them.

Rooming Lists

We can send you a report showing which of your guests have reserved rooms and when they plan to arrive.

Mobile Check-In

Guests can check in before their stay, receive instant alerts when their room is ready and check out by skipping the front desk.

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Reward Yourself

Earn up to 50,000 plus Elite status, discounts and more.

Equipment and Services

Meeting Equipment

AV equipment

CD player

Film projector

LCD projector

Microphone

Overhead projector

PA system portable

Rear screen projection

Stage: portable

TV

TV production service provider

Video camera

Meeting Services

AV technician

Carpenter

Copy service

Decorator

Electrician

Laborer

Locksmith

Photographer

Security guard

Videoconferencing

Business Equipment

Computers

Printers

Business Services

Copy service

Fax service

Fee for each additional page of outgoing fax

Full-service business center

Messenger service

Network/Internet printing

On-site Business Center is Staffed

Overnight delivery/pickup

Post/parcel

Secretarial service

High-speed Internet access

Meeting rooms:Wired,Wireless

Capacity

Floor Plans

Capacity Chart

Convert Feet | Reset
  • St James
  • 8.5x5x2.2
  • 42.5
  • 40
  • 24
  • 16
  • 16
  • 40
  • 24
  • Mayfair 1
  • 7.1x7.1x2
  • 50.41
  • 40
  • 20
  • 18
  • 18
  • 40
  • 30
  • Mayfair 2
  • 7.1x7.1x2
  • 50.41
  • 40
  • 20
  • 18
  • 18
  • 40
  • 30
  • Mayfair 3
  • 7.1x7.1x2
  • 50.41
  • 40
  • 20
  • 18
  • 18
  • 40
  • 30
  • Mayfair 4
  • 7.1x7.1x2
  • 50.41
  • 40
  • 20
  • 18
  • 18
  • 40
  • 30
  • Hanover
  • 11.5x5x2.2
  • 57.5
  • 80
  • 36
  • 24
  • 18
  • 80
  • 36
  • The Berkeley Suite
  • 10.9x5.3x2.2
  • 57.77
  • 100
  • 30
  • 24
  • 16
  • 100
  • 26
  • St James/Hanover
  • 20x5x2.2
  • 100
  • 160
  • 65
  • 15
  • 38
  • 160
  • 80
  • Mayfair 1/2
  • 14.2x7.1x2
  • 100.8
  • 80
  • 40
  • 36
  • 36
  • 80
  • 60
  • Mayfair 1/2/3
  • 21.3x7.1x2
  • 151.2
  • 120
  • 60
  • 54
  • 54
  • 120
  • 90
  • Whitehall Suite
  • 30.9x6x2.2
  • 185.4
  • 558
  •  
  •  
  •  
  • 558
  • 90
  • Mayfair 3/4
  • 28.4x7.1x2
  • 201.6
  • 80
  • 40
  • 36
  • 36
  • 80
  • 60
  • Mayfair Suite
  • 29x7.1x2
  • 205.9
  • 170
  • 80
  • 72
  • 70
  • 170
  • 120
  • Chester Room
  • 10.3x21.5x3.9
  • 221.45
  • 180
  • 84
  • 84
  • 70
  • 180
  • 90
  • Eaton Room
  • 11x21.5x3.9
  • 236.5
  • 200
  • 96
  • 80
  • 80
  • 200
  • 130
  • Belgrave Room
  • 14x21.5x3.9
  • 301
  • 300
  • 120
  • 120
  • 70
  • 250
  • 140
  • Chester/Eaton
  • 21.3x21.5x3.9
  • 458
  • 450
  • 216
  • 240
  • 80
  • 450
  • 250
  • Belgrave/Chester
  • 24.3x21.5x3.9
  • 522.5
  • 600
  • 288
  • 280
  • 110
  • 600
  • 312
  • Westminster Ballroom
  • 35.5x21.5x3.9
  • 763.25
  • 1000
  • 384
  • 360
  • 140
  • 1000
  • 580
  • Somerton (G/R)
  • 0x0x0
  • 0
  • 50
  • 16
  • 24
  • 24
  • 50
  • 40
  • Hampton (G/R)
  • 0x0x0
  • 0
  • 50
  • 16
  • 24
  • 24
  • 50
  • 40
  • Dalby (G/R)
  • 0x0x0
  • 0
  • 16
  •  
  • 8
  •  
  • 16
  • 10

Room Set-Up Examples

Banquet

Generally used for meals and sessions involving small group discussions. A five foot round table seats eight people comfortably. A six foot round table seats 10 people comfortably.

London Marriott® Hotel Grosvenor Square