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The Undercroft at

St Mary's Venue

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The Undercroft is a bright and spacious area, included in the hire of the Great Hall. The exposed fittings create a modern, industrial feel, which creates the perfect blank canvas for your event.

The lower floor also contains a moveable, soundproof wall, allowing you the flexibility to divide the space into two separate areas. Additionally, the three side meeting rooms make superb green rooms or break-out spaces.

The lower floor is a great choice for receptions, conferences exhibitions and more. Having been renovated in 2018, the lower floor is an excellent addition to your event.


  • Wifi
  • Cabaret Style (160)
  • Exam Style (100)
  • Exposed fittings
  • Modern
  • Reception (400)
  • Soundproof wall
  • Stage
  • Theatre Style (250)
  • Blank Canvas
  • Commercial kitchen on site
  • Designed by Robert Smirke (British Museum Facade)
  • Good transport links
  • Grade I listed
  • In-House AV system
  • London Zone 1
  • Open Plan
  • Plenty of toilets
  • Situated in the heart of London
  • Unique, beautiful, impressive space

 Food And Drink

  • External catering allowed
  • External alcohol allowed
  • Space for catering equipment
  • Catering equipment
  • Recommended catering list available


  • TENs Available


  • 400 Reception
  • 400 Standing
  • 250 Theatre


  • Art Exhibitions
  • Pop-Ups
  • Ticketed events
  • Weddings
  • Events with Alcohol


  • 319m2 (3434ft2)
  • Ceiling height 4.0m (13ft)
  • Disabled Access
  • Storage Space
  • St Mary's London
  • Wyndham Place
  • Marylebone
  • London
  • W1H 1PQ

More about 

St Mary's is one of London's most unique venues.

Situated in an excellent and central location just North of Oxford Street, it boasts Grade 1 listed status. Beautiful inside and out and fitted with an impressive sound, visual and lighting system after undergoing a £3.7m renovation, the stunning and spacious Great Hall and multifunctional Undercroft offer over 780 sqm of space.

St Mary's is a highly versatile and impressive venue, making the space ideal for a multitude of events including conferences, award shows, product launches, fashion shows, concerts, dinners & alcohol festivals.

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