Finding the perfect summer party venue in Westminster with private outdoor space can be a challenge. Many locations are public, heavily booked or lack the sense of privacy needed for professional events. For those looking to host a drinks reception, team summer party or networking event in the heart of Westminster, Surveyors House offers a rare and practical solution.
Located directly on Parliament Square, the 5th Floor Roof Terrace at Surveyors House is the only private outdoor terrace to overlook the square, making it a standout choice for intimate summer events of up to 35 guests.
The terrace offers views across Big Ben, Westminster Abbey and the Supreme Court’s Gothic rooftops, placing guests in the centre of Westminster, while still feeling discreet and self-contained. The terrace is particularly well suited for summer drinks receptions, networking events and team gatherings, and is regularly chosen by organisations working with government, public affairs, policy and lobbying groups, as well as teams based locally.
The setting also works well for group photographs and informal team moments, with London’s most recognisable landmarks providing a natural backdrop. Surveyors House is just a five-minute walk from Westminster Pier, making it a convenient starting or finishing point for guests attending summer party boats on the Thames.
Events typically begin with an aperitif on the terrace, where guests can enjoy English sparkling and still wines from Bolney Wine Estate, one of England’s longest-established vineyards. Drinks are served alongside seasonal canapés, creating a relaxed opening to the evening as Parliament Square shifts from day to night.
Our summer party packages in Westminster are designed to offer flexibility as the event develops. Hosts can choose to extend their drinks reception on the terrace until 11:00pm, or continue the evening at Westminster Rooms at No.11 on Great George Street, located just three floors below, where events can run until midnight, which allows for a smooth transition from outdoor drinks to a fine dining dinner, or even a private party with DJ and unlimited drinks, all within the same building.
To support confident planning, Surveyors House also provides a guaranteed indoor space on the same floor as the terrace, offering the same capacity and views across Big Ben. This ensures continuity of experience while retaining the appeal of the setting.
All events at Surveyors House are delivered by Searcys, with over 175 years of British hospitality behind every detail. Our in-house catering is designed specifically for drinks receptions and summer parties, focusing on seasonal menus that pair naturally with English wine and the pace of evening events.
For hosts looking to add structure to the latter part of the evening, Westminster Rooms at No.11 can accommodate a range of hosted activities. These include guided wine tastings, informal poker evenings, and tailored formats suited to corporate or networking audiences, adding interest without moving guests off-site.
For organisations seeking a private outdoor terrace in Westminster for a team summer party, a drinks reception with MPs and stakeholders, or a professional networking event, Surveyors House offers a setting that is central, private and genuinely distinctive.
To discuss availability, view our summer party packages, or arrange a visit to the 5th Floor Roof Terrace, please contact our events team. We would be delighted to help you plan a summer event in Westminster that makes the most of this unique setting.
Summer Party Packages are here!
Celebrate the summer season on top of our private rooftop terrace, the perfect location for holding celebration events, including corporate events, engagement parties, birthday parties and more.
Book your summer celebration by 20th March 2026 to enjoy a complimentary glass of Bolney English Sparkling for you and your guests.
Contact our events team to start planning your summer party.
