One Marylebone

One Marylebone occupies a Grade I listed former church built in 1826 to designs by Sir John Soane, standing on its own island site on Marylebone Road moments from Regent's Park. The building was conceived as a celebration of the defeat of Napoleon, and its neoclassical facade — Portland stone columns, a balustraded terrace, clock tower — has changed little since. Inside, five distinct event spaces range from a soaring 27-foot hall with original mosaics and stained-glass windows to subterranean vaulted brick cellars licensed until 3am.

The Soane Hall is the main event: a vast, column-lined nave capable of 320 seated or 500 standing, flooded with rose-window light by day and transformed by moving-head rigs and uplighting by night. Beneath it, The Vaults run as two floors of arched brick — a mezzanine overlooking a dancefloor-ready main room with a resident in-house sound system, purpose-built for late-night parties. The first-floor Galleries, U-shaped around the East, West and South wings, carry double-height ceilings and floor-to-ceiling windows that shift the atmosphere from corporate presentation to intimate reception depending on how the room is dressed. Outside, The Garden wraps the west flank of the building with teak tables, stretching to 200 standing under marquee cover in winter. And along the east side, nine individual glass-and-steel Greenhouses seat between four and twenty-two guests apiece, each draped in living foliage for private dinners with a distinctly theatrical character.

One Marylebone has hosted MAC Cosmetics, Temperley London and a succession of fashion-week productions. The in-house events team handles catering via One Dining, and the venue holds an events licence that extends to 3am in The Vaults — rare for a building of this age in this part of London. The venue won the London Venue Catering Awards 2025 for Best Venue for Gala Dinners, Awards or Weddings.