At the South West of the present site lies the remains of an oval shaped Iron Age multivallate Hillfort which was at one point part of the hospital but now stands vacant.

[3] It was later reused as hospital offices but was vacated due to poor repair in 1973 and was demolished c.1975[4] The former coach house of this manor built in the mid 19th century survives on the site and is Grade II listed.

It was also the administrative centre for the Coldharbour and Tatchbury Mount Management Committee,[7] the former a hospital for people with learning disabilities in Sherborne, Dorset which diminished in importance following a fire at the site in 1972.

[11] It occupies the southern part of the main area and was granted planning permission in May 2006 to replace the Greenwood and Firs lodges in that location.

[14] To the west of Bluebird House is Ashford a ten-bed unit for men with learning disabilities that have been sectioned under the Mental Health Act 1983.

[15] It replaced the Rufus Lodge and opened in October 2020 at a cost of £10 million and marks the return of this service to the site, which had to temporarily move to Fareham while its previous home at Woodhaven was being converted to become Austen House.

[20][21][22] The western section of the main site contains Forest Court, an 80-bed nursing home owned and run by Hampshire County Council.