9-10 Mountstuart Road, Rothesay, Bute

9-10 Mountstuart Road is a tenement building from around 1880, featuring a symmetrical design with four storeys and seven bays. The centre of the building has a wide, full-height, six-light canted bay, with slightly recessed bowed corners, and there are full-height, five-light projecting bows on both the left and right sides. The exterior is made of coursed yellow sandstone ashlar, with a raised base course and a raised string course. The eaves are overhanging and supported by timber brackets.

The windows on the ground, first, and second floors are architraved and have basket arches, while the third floor features architraved round-arched windows. All windows have chamfered cills and part-fluted cast-iron Corinthian mullions. The sides of the building are finished with harl-pointed random rubble.

On the northwest elevation, which serves as the entrance, there is a two-leaf timber panelled door for No 10, located in the advanced canted bay at ground level. This door has a plate-glass fanlight and a round-arched architraved surround. To the left and right of the entrance are single windows. The first, second, and third floors have a regular arrangement of windows. The entrance for No 9 is a two-leaf timber panelled door offset to the right of centre, also with a plate-glass fanlight and round-arched architraved surround, with single windows above. The outer right side features a full-height five-light bow. There is another entrance for No 10a, offset to the left of centre, with similar detailing and a full-height five-light bow on the outer left.

The building predominantly has two-pane timber sash and case windows, although some ground floor windows have been replaced. The roof is covered with grey slate and features a coped ridge stack at the centre, as well as coped wallhead stacks on the northeast and southwest, with a single brick stack on the outer left.

The interior was not seen in 1996. The boundary wall along Mount Stuart Road is a low, coped squared and snecked sandstone wall, with square-plan sandstone gatepiers on either side of the entrances, topped with square caps.