Mill Number One, New Lanark

Mill Number One in New Lanark is an imposing cotton mill built between 1785 and 1786, which was burnt and rebuilt from 1788 to 1789. It was reduced to three storeys in 1945, restored to its original height from 1994 to 1996, and converted for hotel use between 1996 and 1998. The mill features a five-storey structure with an attic and basement, the latter being exposed at the rear due to the sloping ground. It has a T-plan layout with a prominent three-bay gable at the center, showcasing Venetian windows in the outer bays and a Diocletian window at the apex of the gable. The exterior is constructed of sandstone rubble with stugged and droved ashlar dressings, and it features long and short quoins. The fenestration is regular, with tabbed ashlar margins.

The ground floor has a two-leaf timber-boarded door set within a depressed arch entrance. The south elevation includes semi-circular wheel arches, which now have timber-board doors at the center and stone infill on the flanking arches. There are two small dormers on both the front and rear elevations. The windows on the front have 12-pane glazing, while those at the rear have 6-pane glazing, all in timber sash and case style. The roof is covered with grey slate and features ashlar-coped skews.

Inside, the second floor is constructed with jack-arch techniques supported by inverted T-section beams.