In grounds of 65 acres (26 ha) 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. The ill-fated Sunningdale Agreement on power sharing in Northern Ireland was signed there on December 9, 1973.
The site housed the National School of Government and provided training, organisational development and consultancy courses for UK civil servants and private individual learners until its closure in March 2012. It then housed the privately managed Civil Service College. Within the grounds there are gardens and a lake, a restaurant, lecture theatres, training rooms, a swimming pool and 272 bedrooms in accommodation blocks that are named after distinguished civil servants.
- National School of Government accessed 19 June 2012
- Civil Service College accessed 19 June 2012
- College of Policing accessed 16 October 2016
- "Government sells Sunningdale Park for redevelopment". Property Week. 21 December 2016. Retrieved 24 December 2016.