Rowanmore, 103 Sinclair Street, Helensburgh

Rowanmore is a single-storey and attic villa built around 1860, featuring a symmetrical three-bay design. The exterior is constructed from stugged, snecked grey and red sandstone, with the south elevation painted and the north harled. It has ashlar dressings and a bull-faced base course on the south side. Architectural details include a stepped cill course, eaves course, cornice, and parapet, along with ashlar mullioned windows that have moulded reveals and quoin strips.

The south elevation, which serves as the entrance, has a recessed central bay with a semi-circular arched doorpiece supported by pilasters and topped with a keystone. This entrance is accessed by a flight of six steps and features two-leaf fanlit doors and a half-glazed vestibule door. Canted windows flank the entrance, with tall canted dormers above that break the eaves. The roof is slate-hung with a piended design and includes pierced stone aprons, along with a small dormer situated between the larger dormers.

On the east elevation facing Sinclair Street, there is a window at the first floor in the center. The north elevation features a full-height projection at the center with a timber lean-to porch, and a corrugated iron lean-to is located to the outer right. The west elevation has a window off-centre to the left at ground level, a window at the first floor, and a door leading to the basement on the outer right.

The villa is fitted with plate glass sash and case windows on the south side and 12-pane sash and case windows elsewhere. The roof is covered with purple/grey slate and features ashlar coped skews and an ashlar corniced gable stack on the left.

Inside, the villa boasts corniced ceilings and original chimneypieces. The property is enclosed by a semi-circular coped rubble boundary wall, which includes drum piers topped with semi-circular caps and finished with ribbon pointing.