70 South Beach, Troon

70 South Beach in Troon is a plain classical house built in the later 19th century, with an addition (No 70A) added around 1954. The main house is two storeys high with three bays, while the addition features a single storey with two bays on the outer right and a two-storey, two-bay section on the outer left. The main structure is made of coursed and stugged rubble sandstone, with painted dressings and random rubble at the rear. It has a raised base course, an eaves course beneath corniced eaves, and narrow strip quoins. The windows are framed with architraved surrounds and have bracketed cills, and the entrance is pilastered.

On the northeast elevation (South Beach) of No 70, there is a part-glazed timber panelled door in the centre at ground level, topped by a decorative leaded fanlight. The door is surrounded by a doorpiece with flanking pilasters, a plain frieze, and a cornice. Above, there is a timber-mullioned bipartite window aligned at the first floor. To the left of the entrance, there is a small single window at ground level, and single windows at both floors in the bays to the outer left and right. The additional bay on the outer right has a single window with an adjacent garage door. For No 70A, there is a single door at ground level in the left bay and single windows at both floors in the right bay.

On the southwest elevation (Esplanade) of No 70, there are square-plan piers beneath a piended canopy at ground level, with a large stair window offset to the right above. There are single windows at both floors in the outer left bay and 3-light canted windows at both floors in the outer right bay. No 70A features a single door centred at ground level, flanked by single windows, and a modern oriel window centred at the first floor.

The glazing throughout is predominantly 12-pane timber sash and case, with some 4-pane timber sash and case and modern glazing at the rear. The roof is covered with graded grey slate, and there are replacement rainwater goods with raised skews on No 70. The chimney stacks are coped and rendered with circular cans.

The interior was not seen in 1997. The property is enclosed by boundary walls, which include a low coped rubble wall along South Beach and a taller, coped rubble wall surrounding the site at the rear.