Old Mill, named New Mill on the 1st edition historic O. S. map, is thought to date from the seventeenth century. The frontage, facing east, has two distinct parts; the two-storey north range is built of rubblestone with a steeply-pitched roof covered in stone slabs, and the south range is lower with two storeys, the upper one clad in weatherboarding, under a half-hipped slate roof. At the junction of the two ranges is a chimney stack, stone below and brick above; it was much taller in the 1950s. On the west side is a short, three storey gabled wing.

In 1951 the mill was reported to be owned by Lord Rennell of Rodd, and to be worked occasionally, with three pairs of stones (Miss E M Gardener). The wheel has now been removed. There is a weir on the River Lugg immediately adjacent, but the water supply came from a weir further upstream, by Boultibrooke Bridge, via a 500m long leat.

Information from Cadw Listed Buildings database and other sources.
W J Crompton, RCAHMW, 28 August 2014.