Sunningdale Park Sunningdale Park Sunningdale Park is a meeting and conference venue in Sunningdale, Berkshire that is run by De Vere Venues. In grounds of there is a Grade II listed neo-Georgian mansion called Northcote House, which was built in 1930, and in which notable features include the grand staircase and front portico. Within the grounds there are gardens and a lake, a restaurant, lecture theatres, training rooms, a swimming pool and 272 bedrooms in accommodation blocks. The ill-fated Sunningdale Agreement on power-sharing in Northern Ireland was signed in Northcote House on 9 December 1973. The site housed the National School of
Sunningdale and spa. Now the Coworth Park Hotel, this is a late 18th-century country house. It was the home of Edward Stanley, 17th Earl of Derby, the early 20th century Secretary of State for War and British Ambassador to France. The Sunningdale Agreement was signed at Sunningdale Park, at the Civil Service Staff College (now the National School of Government) on 9 December 1973, a precursor of the Northern Ireland peace process. Sunningdale Sunningdale is a populous village with a retail area and a civil parish in the Royal Borough of Windsor and Maidenhead. It takes up the extreme south-east corner