Modern event space at Convene Sancroft, St Pauls, perfect for meetings and gatherings. - Banner

Seminar Rooms in London for 400 people

Explore top seminar rooms in London for 400 people, ideal for professional events.

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Trending Seminar Rooms Venues in London for 400 People

Finding the perfect seminar room in London for up to 400 attendees can elevate your event's success.

  • Central Hall Westminster - image
    From £17,000 per person2,000

    A grand historic hall in Central London for up to 2,000 guests, ideal for conferences and ceremonies.

  • The Brewery - image
    City of London

    The Brewery

    From £125 per person900

    A vast historic event space with a timber roof, ideal for conferences, dinners, and exhibitions.

  • Holborn

    De Vere Grand Connaught Rooms

    From £140 per person540

    A grand, opulent hall in Covent Garden for large events, featuring high ceilings and elegant decor.

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  • Blackfriars

    The Mermaid London

    From £95 per person600

    A versatile auditorium with tiered seating and AV capabilities, ideal for corporate events and receptions.

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  • Moorgate Place

    One Moorgate Place

    From £4,000 per person400

    A historic hall with a 400-capacity, perfect for conferences, seminars, and presentations.

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  • Westminster

    Church House Westminster

    From £6,750 per person600

    Historic circular event space with a glass dome, ideal for dinners and parties up to 372 guests.

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  • Bankside

    Swan at The Globe

    From £90.5 per person450

    A versatile event space under Shakespeare's Globe with a stage, mezzanine, and riverside entrance.

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  • The City of London

    Leonardo Royal Hotel London City

    From £82 per person500

    A large, versatile auditorium in a central hotel, perfect for conferences and events up to 450 guests.

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