Lynton, 6 Upper Colquhoun Street, Helensburgh

Lynton is a two-storey Arts and Crafts/Shavian Old English villa designed by William Leiper and built in 1908. The building is constructed of stugged and snecked red sandstone with ashlar dressings, harled walls, and jettied sections at the first floor featuring mock half-timbering. The windows are a mix of ashlar mullioned at ground level and timber mullioned at the first floor, with chamfered arrises and overhanging eaves, along with bargeboarded gables.

The north-facing (entrance) elevation features an advanced gabled bay to the left. Two closely grouped bipartite windows are at ground level, alongside a depressed-arched doorpiece with deep, stop-chamfered reveals, a two-leaf boarded door, iron hinges, and a half-glazed vestibule door with honeycomb lead-pane glazing. A battered lintel course and a cavetto corbel course mark the jettied first floor, which incorporates mock half-timbering and three windows, the outer left of which is bipartite. A bipartite attic window is set into the gablehead. A recessed single-storey service wing is to the outer left, and a recessed wing to the right has two tripartite mullioned and transomed windows separated by a buttress at ground level. A five-light window is in the re-entrant angle at the first floor, with a single light to the west face, and an adjoining four-light to the north face, alongside a bipartite window on the right.

The west-facing side elevation features a canted oriel to the outer left and a gabled, full-height canted window to the outer right. At ground level, mullioned and transomed windows are arranged with a 1-3-1 configuration of lights, while the first floor mirrors this arrangement with timber mullioned windows. A jettied gablehead is present.

The south-facing (garden) elevation has a canted, mullioned and transomed window off-centre to the left and another to the outer left, also arranged with a 1-3-1 configuration of lights. A five-light window is positioned off-centre to the left at the first floor, with a bipartite window to the outer left. A gabled, full-height canted window is off-centre to the right, with a mullioned and transomed window at ground level (2-2-2 configuration) and a 1-3-1 configuration at first floor. A window is to the right at ground level, with a semi-canted tripartite oriel above. A small window is at the far right, alongside a harled, full-height stack wall on the outer right. A return to the right reveals a tripartite window at ground and first floor, breaking the eaves. The single-storey service wing advanced to the right is also noted.

The service wing, abutting the east elevation, has a piended roof and a door with windows flanking. An adjoining three-bay block has a door to the centre and windows flanking. A gambrel roof extends to the east, culminating in a tall, off-set stack at the centre. The south elevation has a bipartite window to the left and a tripartite window to the right.

The ground floor windows generally feature plate glass casements below the mullions and fixed lead-pane glazing above, while the upper-storey windows are mostly multi-pane casements. The roof is covered in grey slate. The interior includes wainscot in the hall, a two-bay screen to a timber balustraded stair, wainscot and a timber beamed ceiling in the reception room to the right, and ashlar chimneypieces in the principal rooms.

Red sandstone rubble boundary walls enclose the property. Brick quadrant walls flank brick piers at the principal entrance, leading to two-leaf timber gates.