25 Queen Street, Helensburgh

25 Queen Street in Helensburgh is a single storey and attic house, originally built as stables in 1898 by William Leiper. The building features a mix of rubble, harled and painted surfaces, with half-timbering in the attic. It has overhanging eaves and bargeboarded gables.

The north elevation, facing Queen Street, includes an engaged two-stage circular tower on the left side. This tower has a doorway facing east, a small window to the west, and is corbelled at the first stage. Above the doorway, there is a window facing east with a roll-moulded cill course and an eaves/lintel course, topped by a conical red tiled roof with a finial. To the left of the tower, there are two-leaf boarded garage doors, with modern infill to the right that includes a door in the centre, a horizontal window above, and a large window to the right. Original iron bracket and lamp fittings are positioned above the garage doors and the window to the outer right. Flanking the tower are tripartite gabled dormers that break the eaves, along with a dormer with a swept roof on the far right.

The west side elevation features a modern window to the right at ground level and a bipartite attic window in the centre above.

On the south rear elevation, there is a gabled bay that breaks the eaves off-centre to the right, with two windows in the attic. To the left, there is a modern flat-roofed addition with a doorway and a window to the outer left. Above this addition, there are modern flat-roofed dormers.

Elsewhere, small-pane casement windows can be found in the north gabled dormers, although these are modern. The roof is covered in red tiles with red ridge tiles.

The boundary wall is made of red sandstone rubble with semi-circular coping.