Greenhill Mill stood on the west side of the upper part of The Strand, a short distance south of where the bridge carrying Bridge Street (the road from Dyfatty Road junction to Neath Road) crosses that road. The mill has long been destroyed and the area developed.
The mill was located in what was the rural fringe north of the town. It first appears by name in accounts of 1367 (`le Greenhull?) but was probably one of four unnamed Swansea mills referred to in an inquisition of 1319 as having been granted away from the Gower demesne some time after 1307. If so, it is likely to have a history extending back into the thirteenth century at least. It was one of three water corn mills (along with two at Brynmill, NPRNs 411016-7) which served the Seignorial Borough. There were still four demesne mills in Swansea by 1400 though Greenhill is not named. It reappears by name in accounts of 1449 as `Grenehill? which, with the two other corn mills, were amongst the town's most valuable assets.
The mill survived into the Post-medieval period appearing in Beaufort Estate leases of the eighteenth century. These reveal that its wheel was powered by a mill pond fed by a leat from the Burlais Brook, the historic northern boundary of the Borough. It later became a flint mill, grinding silica for the Cambrian Pottery, adjacent on the river bank. The mill had gone by 1879.

B.Morris Historic Swansea. West Glamorgan Archive Service 2005.
D.K.Leighton `The demesne water mills of the lordship of Gower: a reappraisal?, Melin 21 (2005), p.14-15.
B.S.Taylor `The watermills of the lordship of Gower?, Melin 13 (1997), pp.6-7.
B.S.Taylor `The Mills of the Bwrlais Brook, Gower?, Melin 15 (1999), pp.70-74.

David Leighton, RCAHMW, 9 June 2010