51, 53, 55, 57 Ayr Street, Troon

This building, dated 1900 and designed by James Hay, is a three-story building with an attic, constructed on a corner site in Troon. It originally served as a post office and tenements, and features shops on the ground floor. The building presents a five-bay facade to Ayr Street, a six-bay facade to Academy Street, and a single bay to the southwest corner. It is built of squared and snecked stugged red sandstone, with polished sandstone dressings—some lightly droved—and a rendered side elevation to Academy Street.

The architecture is Edwardian Baroque, distinguished by a raised corner plinth, ground floor banding between the openings, and an architraved corbelled course supporting an oriel window on the first floor. A further architraved cill course is present at the second floor, with corniced eaves and a balustraded parapet completing the facade. Windows are predominantly round arched at ground level, and square headed above, with corniced surrounds, projecting cills, and some columnar mullions at the second floor. Bipartite and single windows are also present. The second-floor gabled windows are notable for their corbelled plinths, flanking columns, central pilasters, and round arched, pedimented Dutch gableheads, topped with ball finials.

The southwest elevation (Ayr Street) features a pair of timber panelled doors set off-centre to the right, with single windows to the right and shops to the left. The corner elevation (southwest) has three narrow, segmental-arched, key stoned windows at ground level, a three-light canted oriel window at first floor, another three-light canted window at second floor, and symmetrically-disposed armorial panels in the parapet. The southeast elevation (Academy Street) has a four-light, round-arched glazing row offset to the left of centre, with a single window, a missing door, another door, and a bipartite window along the ground floor. The upper floors are irregularly fenestrated.

Internally, the building was not inspected in 1997. External features include predominantly replacement glazing, a grey slate roof with raised skews, cast-iron rainwater goods, corniced sandstone ridge and wallhead stacks, and various circular cans.