One Birdcage Walk

Located in Westminster, overlooking St James’s Park and just moments from Big Ben, One Birdcage Walk is a Grade II listed venue combining historic architecture with a broad range of flexible event spaces. Home to the Institution of Mechanical Engineers, it offers a more traditional, prestigious setting for conferences, corporate events and private dining.

The venue is set across multiple floors, with a strong mix of large-scale rooms and smaller breakout spaces. At its core are a number of impressive, character-led rooms with high ceilings and period detailing, supported by a tiered lecture theatre and a series of meeting rooms that allow events to run multiple formats within one location.

Catering is delivered in-house, with menus designed to support both formal dining and high-volume conference service. The venue is particularly well suited to structured corporate events where clarity of layout, guest flow and operational delivery are key.

Key Features

• Grade II listed building in Westminster

• Capacity for up to 300 guests standing

• Tiered lecture theatre for presentations and conferences

• Multiple event rooms and breakout spaces across several floors

• In-house catering and experienced event team

• Overlooking St James’s Park with central London positioning

• Suitable for conferences, dinners, receptions and award events

Spaces

Main Hall Capacity: Up to 300 standing / 200 theatre / 180 dinner Best for: Conferences, receptions, gala dinners Features: High ceilings, traditional detailing and flexible layout

Lecture Theatre Capacity: Up to 120 theatre Best for: Presentations, talks, panel discussions Features: Tiered seating with integrated AV

Council Room & First Floor Rooms Capacity: Varies Best for: Meetings, private dining, breakout sessions Features: Period rooms with natural light and views over the park

Additional Meeting Rooms Capacity: Varies Best for: Workshops, breakout sessions Features: Multiple rooms supporting multi-stream events

Why choose this venue for your event?

One Birdcage Walk is built for events that need to feel established and well put together. The combination of traditional architecture, a strong range of spaces and a central Westminster location makes it particularly effective for conferences, corporate dining and formal events. It offers a level of presence and credibility that more modern venues often lack, while still delivering the flexibility required for multi-format events.