The Trust was formed in 1967, its purpose being "to preserve property and buildings of architectural and historical interest in the county for the benefit of the nation".
[2] Since 1967, the Trust has been instrumental in a number of projects for the restoration and conversion of historic buildings large and small.
[3] The restoration projects of the charity have included the following buildings:[4] Barton Farm, Bradford on Avon (sold 1975);[5][6] Number 23, South Wraxall (sold 1982);[7] Wilton Windmill, near Marlborough (completed 1976);[8][9] Number 3, High Street, Marlborough;[10] Numbers 7, 9, 11, 13, 15, 21, 23 and 25, Church Street, Calne (1987–1992);[11] The Well House, Derry Hill (2002–2003);[12] The Ostler's House, at the Hare and Hounds public house, Pickwick (2003–2004);[13][14] The Apple Store, Rowdeford School (2006);[15] and The Granary, Manor Farm, Yatesbury (2006–2007).
[15] Given its planned nature as a revolving fund, the articles of association of the Trust prevent it from making grants to private owners of historic buildings, but it has sometimes made contributions to special projects around Wiltshire promoted by others.
[17] The Trust assisted Kennet District Council with a study into Devizes Assize Court in 2006–2007,[18] and in 2018 supported the establishment of Devizes Assize Court Trust, a charity which bought the building and aims to restore it to provide a new home for Wiltshire Museum.