Barrachan With Ancillary Structures (Former Glasgow Corporation Water Works), Mugdock Reservoir

Barrachan, built around 1880, is a range of domestic buildings and workshops that form a rough U-plan layout, located at the former Glasgow Corporation Water Works near Mugdock Reservoir. The complex includes a two-storey, three-bay main house, a single-storey and attic, four-bay pair of cottages with dormers, a large L-plan range of single-storey workshops, and smaller detached outbuildings at the rear.

The main house features a two-storey, three-bay gabled design with some stone-mullioned bipartite windows. It is constructed from squared, snecked sandstone with raised quoin strips. The windows have regular spacing, raised margins, and projecting cills. The front door, which is non-traditional and dates to the 1940s, is centrally located and flanked by bipartite windows. To the right, there is a bipartite window with a gabled dormerhead that breaks the eaves at the first floor. The rear of the house has regular fenestration and a tall bipartite stair window at the center. The house has coped stacks with yellow clay cans and a slate roof. The interior was modernized around 1947.

The cottages are a single-storey and attic, four-bay range with gabled, bargeboarded dormers that also break the eaves at the first floor. They are built from roughly coursed squared sandstone with ashlar dressings and have regular fenestration with projecting cills. At the rear, there is a lean-to outshot that contains entrance doors and outhouses, along with corniced ridge stacks topped with assorted clay cans.

The workshops are an L-plan, piend-roofed range that serves as groundsmen's and works' offices and workshops. They are made from squared, snecked sandstone with ashlar dressings and feature irregular fenestration with projecting cills. Some of the windows on the east and south elevations are stone-mullioned multi-light windows. The east elevation has an advanced, crowstep-gabled porch that includes a two-leaf timber-boarded door in the left return.

Additionally, there are other ancillary structures, including a small piend-roofed outbuilding at the rear of the cottage, a garden terrace retaining wall at the rear and side, and a boundary wall surrounding the rear and sides of the property.