Dalfruin, 1 Montrose Street West, Helensburgh

Dalfruin is a villa built in the later 19th century, featuring a single storey and attic with three bays. The exterior is constructed from snecked grey sandstone rubble, with stugged, squared, and coursed dressings. It has a base course, chamfered arrises, and ashlar mullioned windows. The ground floor windows have stepped hoodmoulds, while the gabled ashlar dormers on the south and west elevations break the eaves, showcasing two-light round-arched windows with bracketed cills and saw-tooth coping, complemented by bracketed skewputts. The wide eaves course on the south and west elevations includes a cornice.

On the west elevation, which serves as the entrance, there is a slightly advanced round-arched doorpiece at the center, featuring a panelled door with chamfered reveals and roll-moulding. The doorway is set within a corbelled ashlar gablehead topped with saw-coping, and the apex of the gable abuts the cill of the gabled dormer directly above. Flanking the entrance are bipartite windows at ground level.

The south elevation, facing the garden, has two four-light windows at ground level, with gabled dormers above that also feature two-light round-arched windows. The north elevation includes a garage at the northeast angle, with a flat-roofed porch in the re-entrant angle and a dormer breaking the eaves to the outer left. Most of the windows are made of plaste glass in sash and case style. The roof is covered with grey/green piended slate and includes a rooflight on the north side, along with corniced ashlar stacks that have mostly square-plan moulded tapering cans, and a rendered coped stack to the north.

The boundary wall is constructed from rubble and features gablet coping, with square plan rusticated ashlar piers topped with pyramidal caps.