34 Sinclair Street, Helensburgh

22-26 Sinclair Street in Helensburgh is a tenement building designed by Frank Burnet and Boston, completed in 1899. This three-storey and attic structure features details inspired by Scottish 17th century architecture and has a distinctive broken skyline. The ground floor accommodates modern shops, while the upper levels are constructed from red sandstone ashlar.

Architectural highlights include a cornice separating the ground and first floors, a corbelled string course above the second floor, and chamfered and moulded edges. The building has ashlar mullioned windows, with single windows on the first floor that feature decorative details in shallow relief above the cornice. Canted oriels rise through the first and second floors, complete with aprons and blocking courses.

On the west elevation facing Sinclair Street, there are five modern shops at ground level and a pend located off-centre to the right. A taller gabled bay is positioned off-centre to the left, featuring an oriel and a bipartite window in the attic, topped with a scrolled pediment in shallow relief above the cornice. To the right of this bay is another oriel, with a bipartite window that breaks the eaves above, accompanied by a gabled dormerhead. The far right section has two widely spaced windows on the first and second floors, with windows above that break the eaves, a wallhead stack in between, and a semi-circular dormerhead to the left window, while the right window has a gabled dormerhead. The stack is corbelled at the string course above the second floor. The left side mirrors the arrangement of bays seen on the right, featuring semi-circular dormerheads flanking stacks and a cartouche with the date below the stack on the second floor. A full-height canted oriel is located at the outer right. The windows are primarily plate glass sash and case, with some replaced by uPVC. The roof is covered in grey slate, with ashlar coped skews and scrolled skewputts.