John Hastie Museum, 8 Threestanes Road, Strathaven

The John Hastie Museum, built between 1915 and 1921 by architects James Lochhead and William Brown, is a two-storey, five-bay rectangular building designed in the Anglo-Dutch style. It features a central rounded scrolled pediment on the front and prominent dormers on the rear elevation facing the park. The exterior is cement rendered and painted, with painted stone dressings, a high base course, raised window surrounds, and stepped piended roofs with overhanging eaves.

The principal elevation is symmetrical, showcasing a timber-panelled door set in a roll-moulded surround, with carved signage above that reads "THE JOHN HASTIE MUSEUM" in a moulded surround. Above the door is a window and a date stone indicating 1915, flanked by two windows with blind semicircular panels above. The outer bays feature single small windows.

On the northeast elevation, there is a two-storey front block to the right with a single timber boarded door and a window above it. To the left is a two-bay rear block with a single door and a small bipartite window on the far left. The southeast elevation mirrors this arrangement, with a two-storey front block to the left and a two-bay rear block to the right.

The west elevation, facing the park, has three wide central bays on the ground floor that have been later infilled with panelling and steel shutters. The outer bays contain small bipartite windows, and there is a five-light flat-roofed box dormer.

Inside, as seen in 2004, the museum features timber block flooring, tiled fireplaces, and timber panelled doors.

The boundary walls consist of a coped squared rubble wall with chamfered coping along Threestanes Road. Square-plan ashlar gatepiers topped with domed capstones display the 'JHM' monogram. The building has PVCu windows, a stepped piended roof covered with graded grey slates, overhanging bracketed eaves, wallhead stacks with tall clay cans, and cast iron rainwater goods.