The Bulstrode Estate in Buckinghamshire has been sold to a private buyer for £13m.
The Grade-II listed property, set in 38.9 acres of grounds, is a property occupying 106,000 sq ft and dating back to the 17th century.
The grand building has been owned by long-standing international mission organisation, WEC UK, a Christian charity, since 1967.
The group has gradually restored and improved public parts of the house’s interior.
The sale attracted strong interest from residential developers, hoteliers and international education groups, excited by the proximity and ease of travel to central London.
The building is located close to Gerrards Cross.
Bulstrode Estate went on sale in March for £15m with Savills.
Gary Witham, director in the hotels team at Savills, commented: “We are pleased to have sold Bulstrode, it is an outstanding example of Victorian architecture within a stunning listed setting. The influence of people who have trained here has been global and the estate has an exciting future under new ownership.”