Chiltern Open Air Museum is an independent open-air museum of vernacular buildings and a tourist attraction located near Chalfont St Peter and Chalfont St. Giles in the Chiltern Hills, Buckinghamshire, England. The museum is a registered charity under English law and has a small number of full-time staff and a volunteer workforce of approximately 200.
The museum was founded in 1976 and aims to rescue and restore common English buildings from the Chilterns, which might otherwise have been destroyed or demolished. The buildings have been relocated to the museum's 45-acre (180,000 m2) site, which includes woodland and parkland. The collection has more than 30 buildings on view including barns, other traditional farm buildings and houses.
Buildings of interest include a 1940s prefab from Amersham, a reconstruction of an Iron Age house, a Victorian toll house from High Wycombe, a "Tin Chapel" from Henton, Oxfordshire and a forge from Garston, Hertfordshire. A fine pair of cottages from 57 Compton Avenue at Leagrave, near Luton which started out as a weather-boarded thatched barn with central double doors in the early 18th century. In the late 18th century the barn was converted into two labourers' cottages.