25 Bentinck Drive, Troon

25 Bentinck Drive in Troon is an early 20th-century, asymmetrical two-storey, three-bay Free Style house that was subdivided in the later 20th century. The exterior features squared and snecked bull-faced red sandstone with polished ashlar dressings. Notable architectural elements include a chamfered band course at the base, moulded eaves at the gableheads, and overhanging timber bracketed eaves. The building has polished quoins at the rounded angles, long and short surrounds to chamfered openings, sandstone mullions and transoms, chamfered cills at the ground level, and projecting cills at the first floor.

The entrance elevation features a single-storey porch at the centre with an oval window facing southwest, set in a stylised surround with blocked columns, a corbelled cill, a corniced keystone, and a ball-finialed panel that breaks the round-arched, architraved pediment, which is centred in a balustraded parapet. To the left, there is a corbelled angle turret and a round-arched Gibbsian surround leading to a replacement part-glazed door. Above, there is a single opening at the first floor beneath a stylised, round-arched gablehead. The left side has bipartite windows on both floors within a bell-cast bay, while the later porch is recessed to the outer left. The advanced wing on the right includes two three-centred arched bipartite windows at the ground level and a crenellated parapet above a corbelled four-light window at the first floor, also beneath a stylised, round-arched gablehead.

The house predominantly features uPVC glazing and has grey slate pitched and piended roofs, with some original rainwater goods still in place. Coped red brick wallhead stacks are located to the northwest and southeast, with circular cans.

The interior was not seen in 1997. The boundary wall is a low coped squared and snecked bull-faced sandstone wall enclosing the site, with red brick on the side and a cast-iron pedestrian entry gate.