Dun-Donnachaidh, Knockard Road, Pitlochry

Dun-Donnachaidh is a house dating from the later 19th century. It is a two-storey, five-bay building with a three-stage bellcast-roofed entrance tower and a single-stage conical-roofed tower. The exterior is constructed of squared and snecked rubble with stugged and droved ashlar dressings. Features include corbels and round-headed windows, along with stop-chamfered arrises, stone transoms, and mullions.

The south elevation features an advanced, finialled gable in the centre bay with a four-light canted window on both floors, the first-floor window being slightly smaller and incorporating simple brattishing. A circular tower is situated in the re-entrant angle to the left, with steps leading to a two-leaf panelled timber door, featuring plate glass fanlight and a narrow light. A window is present on the second stage of the tower, with it corbelled to square at the third stage and incorporating a further narrow window. The bellcast roof above displays a decorative slating pattern and a cast-iron weathervane. A window is present on each floor in the bay to the outer left, beneath the pitched roof. A bipartite window is found in the single-storey penultimate bay to the right, and an engaged round tower is situated with two blinded windows to the outer right.

The west elevation showcases a four-light canted window on each floor of the bay to the left. A recessed bay to the right contains a bipartite window at ground level and a single window above, which breaks the eaves into a finialled dormerhead.

The north elevation displays a variety of elements across an irregular form, including a broad gabled bay to the right of centre, featuring a small round-headed window, and a four-light transomed stair window.

The east elevation is asymmetrical, incorporating an advanced single-storey gabled bay to the right of centre and a low piended bay to the left.

The windows are timber sash and case, with two-pane upper sashes and plate glass glazing patterns. The roof is covered in grey slates. Coped ashlar stacks with polygonal cans are present. Overhanging eaves incorporate kingposts and spike finials, with plain bargeboarding. Cast-iron downpipes with decorative rainwater hoppers are also features.

The interior includes decorative plasterwork cornices. A consoled grey marble fireplace is located below a round-headed window, flanked by niches and featuring tiny plasterwork putti heads.

A polygonal boarded timber ancillary building, which served as a summer house, is also present; it has timber sash and case windows and formerly had a slated, conical roof.

The property is enclosed by coped rubble boundary walls with pyramidally-coped square-section ashlar gatepiers.