London's most distinctive venue for hire - not your typical conference centre

St Mary's Marylebone is a Grade I listed Georgian building in the heart of Central London - a striking, flexible event space that works beautifully as a conference venue, wine tasting or trade show space, concert hall, dining experience or wedding reception venue. With capacity for up to 600 guests and full AV, lighting and catering support, we're the alternative event venue that leaves a lasting impression.

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An empty auditorium or conference hall with a stage at the front, rows of chairs facing the stage, a large pipe organ on the left, and several large screens hanging from the ceiling. The hall has high ceilings with blue and white decor, large windows

A formal dinner event in a grand hall with long tables filled with people, warm lighting, and string lights hanging from the ceiling.

Interior of a church or event hall with rows of wooden chairs facing a stage, large curtains, and a screen displaying the text 'st mary's'. The ceiling is arched with painted panels, stained glass windows are visible, and there are two levels with ad

Musician standing on stage holding an electric guitar, facing an audience in a large hall with candles on the stage and architectural details in the background.

Low-angle view of a historic church tower with a clock, framed by green trees and a clear blue sky.

A choir performing on stage during a Christmas concert, with an audience seated and raising their hands, and a large screen displaying holiday-themed graphics and the text 'Breast Cancer Now Christmas Carols 2024'.

Empty conference room with rows of wooden chairs, a wooden reception desk, potted plants, a television screen, and string lights hanging from the ceiling.

Fashion models walk down a runway on a fashion show stage with an audience seated on each side. The backdrop features a sign that reads 'WHITE STUFF' and there are large posters on the wall showing people with captions.

Why choose us?

Not your average conference venue

Grade I listed, 1778

A 246-year-old Georgian building with soaring ceilings, stained-glass windows, and oak floors — a setting that makes your event memorable before it even begins. Nothing like a hotel ballroom or hired boardroom.

Two fully equipped spaces, one hire

Great Hall + Undercroft, up to 600 guests

The Great Hall (up to 600 standing) and the Undercroft (up to 400 standing) are yours exclusively. Divide them, combine them, or use both simultaneously for plenary and breakout — the layout is entirely yours to design.

Central London, effortlessly reachable

W1H 1PQ — 8 min from Baker Street

On York Street, Marylebone — 8 minutes' walk from Baker Street (5 Tube lines) and Marylebone mainline station. Easy for guests travelling from across London, or arriving by train from outside the city.

Dry hire with full in-house AV

Your event, your way

Hire the space on a dry basis and bring your own suppliers — or use ours. Full in-house sound, lighting, and AV system with wireless microphones and a 4-metre presentation screen are included. Bring your own caterer or choose from our award-winning partners.

Dedicated event manager, start to finish

Not a faceless booking platform

From your first enquiry to the moment your last guest leaves, you'll work with the same dedicated event manager. We help with layout planning, supplier logistics, licensing, and on-the-day coordination — so you can focus on your event.

Accessible — and a registered charity

Step-free access throughout

Both the Great Hall and Undercroft are fully accessible with step-free access. As a registered charity, we may also be able to offer VAT benefits on your hire — ask our team for details.

Exclusive dry hire of the entire events space

We offer exclusive dry hire of the entire event space, giving you complete creative freedom and full privacy for your booking.

Full-day hire: 8:00 am – midnight

Evening hire: 4:00 pm – midnight

With either option, your event must end by 10:30 pm.

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Audience members seated and attentively listening in a conference room with large windows and curtains.

Conferences

People at social event enjoying food and drinks, engaging with a vendor at a booth made of wood, in a warmly lit indoor space.

Dining

Assorted bottles of alcohol and spirits on a table, including gin and other liquors, in a blurred background.

Wine Tastings

Group of women in an audience at a conference or event, some smiling, clapping, and posing with a phone during a presentation.

Fashion Shows

A woman with curly red hair singing into a microphone on stage with a wooden backdrop.

Concerts

People dancing and socializing at a festive indoor event decorated with hanging paper lanterns and floral arrangements.

Wedding Receptions

The Great Hall

The Great Hall is the centrepiece of St Mary’s - a magnificent space featuring original Georgian architecture, soaring ceilings, elegant oak floors, and stunning stained-glass windows. This visually striking setting is perfect for conferences, fashion shows, weddings, wine tastings, exhibitions and concerts.

Fully equipped with its own sound, AV, and lighting system, featuring wireless microphones and a 4-meter-wide screen for presentations.

Interior of a church with wooden chairs arranged in rows, a stage with a large screen displaying 'st mary's,' stained glass windows, and a high arched ceiling with blue panels.

Fashion Show - 400

Classroom - 200

Reception - 600

Theatre - 600

Banquet - 300

Cabaret - 300

An empty church or auditorium with rows of wooden chairs, a raised stage, stained glass windows, and a high ceiling with skylights and blue accents.

The Undercroft

The Undercroft, adjoining the Great Hall, is a versatile space for conferences, receptions, and exhibitions. A movable soundproof wall divides it into two rooms, each with full audio-visual systems, while three lockable meeting rooms serve as breakouts, green rooms, or storage. A commercial kitchen nearby caters for up to 300 guests - see our catering page for details.

Empty event hall with string lights on the ceiling, a bar area on the left, a row of gray sofas on the right, and large windows at the back.

Theatre - 360

Banquet - 250

Cabaret - 180

Reception - 400

Classroom - 120

Panel discussion at a conference with five speakers seated on stage and an audience listening in a large room with string lights overhead.