Coach house or garage approximately 9 metres north west of Holystreet Mill

The building is a coach house or garage located approximately 9 metres northwest of Holystreet Mill, constructed between 1913 and 1914. It features granite rubble with granite ashlar detailing, and the upper floor is slate hung. The structure has granite stacks with granite ashlar chimney shafts and slate roofs.

The plan shows that the building faces east and is built across and terraced into the hillside. It consists of a three-bay coach house or garage with self-contained accommodation above. There are three rooms, with the outer ones having projecting end stacks. Small single-storey blocks flank each end; the left side contains a pair of stores, while the right side has another coach house.

The exterior presents a symmetrical three-bay front. The coach sheds are behind an arcade of granite ashlar segmental-headed arches supported by raking buttresses at each end. Behind these arches are three doorways with large sliding doors. The accommodation above has three timber casement windows, with four lights flanking a three-light window. The front features an M-shaped gable with two large gables and a small central gable that has a painted clock face beneath it. The main roof is gable-ended. The right end of the coach house includes a two-light granite mullion-and-transom window. Set back from the front, the left side has three single-light windows with doors between, and the right side has two mullioned windows. Access to the first-floor accommodation is via a door from the rear terrace.

The interior has plain carpentry details. This coach house, along with the stables and mill, forms an attractive group of listed buildings associated with Holystreet Mill, all set in a particularly picturesque valley.