12 Carrick Avenue, Ayr

14 Carrick Avenue in Ayr is a building designed by John A Campbell around 1905. It is a single-storey structure with an attic, forming an L-plan layout that includes a former lodge and gatehouse for Carrick House. The exterior features coursed rubble, which is partially painted, with ashlar dressings and harl. There is a base course and bracketed timber eaves.

The north entrance elevation has a layout of 4-4-4-2. To the outer left is a modern garage extension, with a corniced timber door to the left and a single window in the inner left bay. The inner right bay is canted and has timber framing on the first floor. There is a roll-moulded arch leading to the bay on the right, which was a former gateway, along with a narrow horizontal strip light and a modern glazed door at ground level. The attic features a pedimented gabled dormer with a small balustrade.

Adjacent to the right is a 4-bay section with an off-centred square-headed doorpiece, a two-leaf timber door, and a three-light fanlight. Above, there is a small dormer aligned with the attic, flanked by bipartite windows on both the ground and attic floors. There is an additional single window at ground level in the inner bay to the left. The pattern mirrors that of No 12, with an extra single window at ground level in the inner bay to the right. To the outer right, there are two bipartite windows at both the ground and first floors.

The east side elevation is nine bays, grouped in threes. To the left is a central corniced entrance to No 20, flanked by bipartite windows. There is a central single catslide dormer in the attic, along with flanking bipartite piended dormers. This elevation has an identical pattern to the adjacent No 18, with a canted bay at ground level to the right. The left side of No 16 features a canted window, a modern glazed opening in the centre, and glazing in the advanced extension to the right, with a bipartite window above at the gablehead.

The south elevation was not seen in 1999.

The west elevation is asymmetrical, with a gabled bay to the left that has a single window off-centre to the right. There is an architraved doorway in the flanking bay to the right, surrounded by irregular fenestration. The attic has slate-hung rectangular dormers, and there is a harled addition with a door on the left return adjoining to the outer right.

The building predominantly features four-pane timber sash and case windows, with some modern glazing. The roof is slate, with partly harled stacks that have brick oversailing courses and circular cans. The rainwater goods are made of cast iron.

The interiors were not seen in 1999.