Strathallan Castle is situated amongst 405 ha (1000 acres) of fine parkland, woodland and farmland near the Machany Water 3 miles (5 km) northwest of Auchterarder. It dates from 1818 when an earlier building was remodelled by Robert Smirke for Member of Parliament James Drummond, who was later to become Viscount Strathallan. Now B-listed, the house comprises a substantial two-storey castellated Tudoresque mansion, with an unusual turreted porte-cochère.
In 1910, the Castle was bought by Sir James Roberts (1848 - 1935), a Yorkshire industrialist, but was temporarily taken over during the First World War as a Red Cross convalescent hospital for wounded soldiers. During the Second World War it housed Laurel Bank School, which was evacuated from Glasgow. Thereafter it became home to Sir William Roberts (1936 - 2012), who established a fine collection of historic aircraft at his private airfield to the north of the Castle. The popular T in the Park music festival came to the Strathallan Estate from Balado in Fife in 2015 but was immediately mired in controversy relating to traffic congestion, crowd safety and disruption to local residents. Today Strathallan remains a family home, although it accommodates corporate and private events.