SWT carries out conservation activities on a considerable area of Surrey County Council's large countryside estate and also manages land on behalf of the Ministry of Defence estate.
As of 2022 the SWT manages more than 6,000 hectares (15,000 acres) of land for wildlife and employs more than 100 staff.
[1] As of April 2022 the SWT manages sixty-eight nature reserves.
[2][a] Thirty-one are Sites of Special Scientific Interest, nine are Special Protection Areas, eight are Special Areas of Conservation, one is a national nature reserve, twelve are local nature reserves, four are Nature Conservation Review sites, two are Geological Conservation Reviews, five include scheduled monuments and two are listed on the Register of Historic Parks and Gardens of Special Historic Interest.
Its top level of government is provided by Surrey County Council and the lower level by eleven boroughs and districts, Elmbridge, Epsom and Ewell, Guildford, Mole Valley, Reigate and Banstead, Runnymede, Spelthorne, Surrey Heath, Tandridge, Waverley and Woking.