17 Cathcart Street (Flats A-N), Ayr

The building at 17 Cathcart Street in Ayr is a former relief church, constructed in 1816. It is a two-storey structure with an attic, featuring a near rectangular plan and a pedimented design. The exterior is made of sandstone rubble and includes a base course, eaves course, cornice, blocking course, and strip quoins. The windows have segmental-headed openings with narrow margins.

On the southwest entrance elevation, the central three bays are advanced and pedimented. This features a pedimented doorpiece with a triglyph frieze, flanked by columns that support a glazed timber door and a letterbox fanlight. Pilasters are positioned beside the side-lights, and there is a single window above on the first floor, along with an architraved oculus in the pediment. The flanking bays have regular fenestration.

The southeast side elevation consists of three bays with regular fenestration at the ground, first, and attic floors. The first floor has segmental-headed openings, while the ground floor features relieving arches. Square windows flank a central cartwheel opening in the attic. There is a single-storey porch on the outer right with a glazed timber door and fanlight.

The northwest elevation, facing Fort Street, mirrors the southeast elevation but lacks the entrance porch. The northeast side elevation has five bays with regular fenestration on the ground and first floors. A central window on the ground floor has been converted into a glazed timber door with side-lights. There is an adjoining lean-to on the outer left, with a timber door and fanlight at ground level, and a single window aligned above to the right. An exterior railed stair leads to a timber door on the left.

The building predominantly features four-pane timber sash and case windows, a grey slate roof with rooflights, stone skews, gablehead stacks, and polygonal cans.

The boundary wall surrounding the site on the northeast and northwest elevations is coped, with single square-plan gatepiers at both elevations topped with pyramidal caps and modern iron gates.