Hill Farm Barn is one of the barns preserved at the Chiltern Open Air Museum in Buckinghamshire. It is a timber framed barn with no aisles. It has a central midstrey, a wagon porch with a hipped-roof and two outshuts projecting either side. The outshuts are used as wagon sheds.
Inside it is a post and truss construction, divided into five bays. The roof trusses have raked queen posts supporting the principal rafters. There are arched and straight braces to the posts.The barn is still used to store grain and the threshing machine. There is also a large cherry-picking ladder in the roof.