Castle Hotel Windsor takes day meetings from four people, residential seminars and conferences for up to 400 delegates, as well as wedding receptions for up to 260 seated guests. It stands at 18 High Street in the center of Windsor, Berkshire, and has 108 bedrooms across its Main House and the Mews Building.
Seminars and company events
The hotel runs 10 meeting and event rooms, so a single booking can pair a plenary room with several breakout rooms. The largest setup joins the Windsor and Georgian Suites into one space of 308 sq m that seats 400 theatre style, 300 for a banquet, 170 in cabaret, 150 in classroom and 60 around a U-shape. Smaller groups use the boardroom suites, which take from 4 to 24 people. The meeting spaces sit apart from the main hotel areas, which keeps sessions private, and a dedicated breakout area serves refreshments, with tea and coffee available all day.
Day delegate packages include large screens and high-speed Wi-Fi. The Windsor and Blenheim Suites have ClickShare wireless presentation and Bluetooth audio. The team also runs team-building formats built around challenges and puzzles, with optional evening drinks, and the whole venue can be hired by groups that need full privacy or extra space.
Weddings and receptions
The hotel sells wedding packages, and a dedicated wedding team helps couples plan the day. Three suites are offered for receptions. The Windsor Suite seats up to 260 guests under vaulted ceilings and chandeliers, with a private bar and room for a dance floor. The Sandringham Suite takes up to 60 guests and keeps an original fireplace and its own bar. The Balmoral Suite seats up to 50 guests and also has a bar. Private dinners and other celebrations are handled by the same events team.
Rooms and capacities
On its own, the Windsor Suite covers 216 sq m with plenty of daylight and seats 260 theatre style or 204 for a banquet. The Balmoral Suite (83 sq m) and the Sandringham Suite (75 sq m) each seat 80 theatre style and 72 for a banquet, or 24 in a boardroom layout. Five boardrooms complete the range: Blenheim for 14, Chatsworth for 12, Holyrood for 8, Warwick for 6 and Hampton for 4.
Accommodation
With 108 bedrooms, residential meetings and wedding weekends are easy to plan on one site. Rooms are split between the Main House and the Mews Building, a block that once housed royal thoroughbreds and has been refurbished and reopened.
Catering
Catering is in-house. Penningtons, the hotel brasserie, serves seasonal British cooking, and the hotel also has a bar and serves afternoon tea. Meeting menus range from light bites to full meals, with gluten-free and vegan choices and a plant-based menu.
History and setting
The hotel traces its origins to 1528, when it opened as the Mermaid Inn, a tavern serving a town of about 1,000 people. During the English Civil War the innkeeper George Pennington created his own coin, the Pennington penny, to deal with a shortage of currency. In 1793 William Want took over the inn and also served as postmaster to George III. A later innkeeper, Richard Martin, renamed it the Castle Inn and received its first Royal Warrant.
Getting there
The hotel is in central Windsor, with two train stations within walking distance and quick access to the M4 motorway. London Heathrow is about half an hour away by road. On-site parking is available for delegates and guests.





