No. 4 Hamilton Place

Nine event spaces across five floors of a Grade II listed Edwardian townhouse in Mayfair, with Hyde Park on the doorstep and a heated rooftop terrace that genuinely operates year-round. No. 4 Hamilton Place has been home to the Royal Aeronautical Society since 1939, and the aviation heritage surfaces in room names — Bill Boeing, Handley Page, Sopwith — without overwhelming a building that works primarily as a polished, flexible event venue with serious presentation capability.

From Lecture Theatre to Roof Terrace at No. 4 Hamilton Place

The range across floors is what distinguishes No. 4 from single-room venues at this price point. The Bill Boeing Lecture Theatre anchors the ground and lower ground floors with tiered seating for 200-250 and a blank canvas exhibition floor when the seats retract. The Argyll Room and its west-facing terrace on the first floor handle up to 200 for standing receptions with views directly over Hyde Park. The Marshall of Cambridge Room adjoins the Bill Boeing for seamless registration, refreshment breaks, and reception flow. Higher up, the Handley Page and Sopwith Rooms offer bow-windowed intimacy with park views, while the Business Lounge on the third floor delivers the venue's highest-spec AV setup for board-level meetings. The Airbus Business Suite on the lower ground provides contemporary breakout with mood lighting and dedicated wifi.

The Roof Terrace

Heated marquee cover makes this one of the few central London rooftop event spaces that operates beyond summer. Hyde Park views and open air give celebrations, receptions, and post-conference drinks something that the building's interior rooms — however elegant — can't replicate. For Christmas parties and winter events, the marquee transforms the space without losing the outdoor atmosphere.

Events and Practicalities at No. 4 Hamilton Place

In-house catering is handled by FoodbyDish, with approved external caterers also available. The venue holds a civil ceremony licence and an alcohol licence until midnight with extensions possible. Cutting-edge AV with dedicated technicians comes standard — particularly strong in the Bill Boeing, where the full rig includes a 4.9m retractable screen, three-chip projector, stage lighting, and hybrid event capability. Hyde Park Corner and Green Park tubes are both within walking distance, with a taxi rank directly outside the door.