49 Mountstuart Road, Rothesay, Bute

49 Mountstuart Road is a double villa designed by John Duncan and dated 1877. This symmetrical, two-storey building features eight bays in the style of Alexander Thomson and serves as the center of a symmetrical terrace. The layout is grouped 2-1-2-1-2, with the central bays advanced while the outer left and right bays are recessed. The villa is constructed from yellow sandstone ashlar with polished ashlar dressings, and includes a raised base course, architraved cill courses, and a raised eaves course beneath overhanging bracketed eaves. The central section is adorned with anthemion parapet detailing, and the building has raised quoins, square-headed chamfered openings, and corniced surrounds to the ground floor windows in the outer bays. The first floor features pilaster reveals and mullions, corbelled cills, and columnar entrance porches. The sides and rear are finished in random rubble sandstone.

On the north (entrance) elevation, there are single windows on both floors in the advanced central bays, with the initials "JD" embossed in a central armorial panel. The elevation also includes single oeil-de-beouf attic windows and decorative cast-iron brattishing above a French-pavilion roof. The ground floor features 2-light canted windows in the bays flanking the center, while the first floor has 3-light canted windows aligned above. There are two-leaf timber panelled doors set in round-arched surrounds, recessed in the penultimate bays to the outer right and left, with balustraded square-plan columnar porches in front. Single windows are aligned on the first floor, and bipartite windows are present on both floors in the outer bays. A gabled bipartite dormer is located at No 49.

The villa has 2-pane timber sash and case glazing and a graded grey slate roof, with replacement rainwater goods. Corniced wallhead stacks and various decorative cans are also present.

The boundary walls consist of a coped random rubble wall along Mount Stuart Road, featuring an oval datestone set in a segmental-arched surround at the center, inscribed with "Royal Terrace 1877" and surmounted by an anthemion and flanking consoles. The square-plan gatepiers have a raised base course and consoled broken pediments on each facet, with armorial panels centered below and topped with ball-finials. Various cast-iron pedestrian entry gates complete the entrance.