It is difficult to locate windmill sites, which could be moved. A windmill in Frodsham was built in 1347, but the location lost.
Ogilby's map depicts a windmill to the east end of the town, south of the main road and beyond the housing, perhaps on the edge of the hill by Fluin Lane. None of the field names suggest the site, although contemporary records refer to Windmill Hill. Greenwood's map of 1819 marks a windmill at the site of the saltworks by the Weaver, but none of the contemporary cartographers indicate this.