Coedtrewernau Mill and attached cottage

A 2-storey mill with slightly higher 1½-storey cottage to its R, separated by a vertical joint, both of rubble stone with slate roofs and the cottage has a stone stack to the R (a stack on the L side has been removed). The mill faces S and has openings under wooden lintels. A boarded door is on the R side, to the L of which are 2 windows covered with corrugated iron. In the centre is a gabled loft loading door. To its L is a small upper-storey window. The gable end has an irregular opening from where the axletree was removed, and a small opening to control the flow of water. The wheelpit has been infilled. The gable is weatherboarded and has an opening with boarded shutter. At the rear is a split boarded door to the L, shuttered opening to the R and small loft window.

The restored 2-window cottage faces S. It has a central replacement split boarded door flanked by 3-light windows under brick segmental heads and 2-light half dormers. The rear has a lower gabled projection, to the R of which is a replacement boarded door, and a half dormer above (formerly with a lower sill).

The mill retains much of its machinery, including pit wheel and spur wheel, and 2 bed stones in the upper floor. The 3-bay collar-beam roof has iron bolts instead of wooden pegs.