Siddington Mill Siddington · Gloucestershire · England

Siddington Mill is the windmill identity associated with the Round House at Siddington. The surviving structure is a round stone tower, probably late eighteenth-century in date, and is protected as a Grade II listed building. It has long carried a degree of ambiguity in its architectural interpretation, being described as reputed to have been either a windmill or a folly, but specialist mill records identify the site as a tower corn mill.

The tower is built of rubble stone with battered walls, two plat bands, and an overhanging castellated parapet. Its openings are distributed across three levels, and the structure had already become semi-derelict by the time of the listed building survey in July 1985. Historic map evidence supports the windmill interpretation: a windmill was marked at this location on Bryant's map of 1824 and on the Ordnance Survey map of 1830. Local industrial archaeology work has also connected the tower with the late eighteenth-century landscape around Siddington and the Thames and Severn Canal.

The surviving tower no longer preserves a complete windmill form, and its cap, sails, windshaft, and working machinery have gone. Its significance lies in the survival of the masonry tower, which preserves the visible footprint and vertical form of a former tower mill or windmill-derived structure within the Siddington landscape.