Visit our sites Bourn Windmill Help Bourn Windmill Bourn Windmill is one of the oldest windmills in England and is designated as an Ancient Monument. There are only 5 trestle post mills left surviving in the UK. The charity has cared for this remarkable building since 1932 and during its life the Windmill has undergone many repairs and rebuilds; the mill machinery dates from the 19th century. This much loved building and its historic setting needs the support of people like you so that it can continue to be enjoyed by, and educate, future generations. We don't receive any regular funding for the running or repair of the windmill from local or national government or other bodies. To carry out this essential work we need your help: Please click here to donate to help our work caring for this historic building and our other properties. Would you like to help look after the Mill or act as a guide on open days? Please volunteer your time or expertise to help care for the Mill, welcome visitors on open days or raise funds, click here to find out how. Please become a member of our charity - your subscription will help support all our historic properties and green spaces, including Bourn Windmill, click here to found out how to join. Leave a gift in your will to Bourn Windmill to help ensure there is a post mill here for many more hundreds of years, click here to find out how. A huge "thank you" to all the fantastic donors and volunteers who help to care for Bourn Windmill.