One Great George Street

Twenty-one function rooms inside a Grade II listed Edwardian building that sits walking distance from Parliament, Westminster Abbey, and St James's Park. One Great George Street has been the headquarters of the Institution of Civil Engineers since the building was completed, and that institutional pedigree runs through everything — from the neo-Palladian interiors to the award-winning conference and gala dinner operation that's made it one of Westminster's most established event venues. The range spans intimate six-person meetings to 400-guest receptions in the Great Hall, with two purpose-built lecture theatres, dedicated breakout rooms, and an in-house AV team that keeps everything running without external suppliers.

The Great Hall and Principal Spaces

The Great Hall is the centrepiece — over 370 square metres with ceilings exceeding 13 metres, a painted ceiling by Charles Sims, oak floors, marble columns with gold leaf detailing, and seven floor-to-ceiling windows flooding the room with natural daylight. It holds 400 standing, 260 for dinner, and 220 for dinner dances. Below it in scale but not in character, the Smeaton Room takes 150 theatre-style, and the Council Room offers dark oak panelling and a chandelier for events that need traditional gravitas in a more contained setting.

Conference Capability at One Great George Street

The Telford Theatre seats 240 in tiered rows beneath a glass-domed roof — a purpose-built lecture space with dark wood panels, a built-in stage, lectern, and top table. The Godfrey Mitchell Theatre on the lower ground links to it for a combined 340-plus capacity. Sound and vision systems connect across the building, enabling overflow screening in adjacent rooms and hybrid formats. The Palmer Room offers a modern, minimalist alternative for up to 100. For smaller meetings, boardrooms seat from 6 to 14. This depth of conferencing infrastructure — proper theatres, not repurposed dining rooms — is what separates One Great George Street from heritage venues that can host conferences but weren't built for them.

Events and Practicalities at One Great George Street

In-house catering handles everything from canape receptions to formal banquets, with dedicated menus developed for the venue. The building is fully wheelchair accessible with air conditioning throughout and complimentary high-speed wifi. Licensed until 23:00 with late extensions available. State-of-the-art AV comes with in-house technicians — included, not charged separately. The Westminster address places delegates within sight of Parliament and a short walk from St James's Park tube, giving corporate events, government-adjacent conferences, and formal dinners a location that communicates seriousness before anyone enters the room. The building is currently undergoing refurbishment — site visits may be limited during this period.