Loonbrae, Ashgrove Road, New Rattray

Loonbrae is a house dating from approximately 1835 to 1840, with later alterations. It is a single-storey building with a raised basement and attic, and has a distinctive 'cottage ornée' style, with three bays. The exterior walls are harled, accentuated by painted quoin strips and margins. It has a harled brick porch. Stone mullions are present.

The southwest elevation, which is the principal facade, is symmetrical. A full-height canted bay dominates the centre, with a modern door and small windows at basement level. Above are three large windows on the ground floor, leading up to a polygonal roof with a set-back, polygonal roofed dormer window and decorative cast-iron finial. A low-pitched, swept piended roof is behind, with a centre attic feature running transversely across the main roof and abutting the dormer. The flanking bays each have a small window at the raised basement and a large window at ground floor level. A small, pitch-roofed porch is located on the outer right, with a panelled timber door, a plate glass fanlight, and a small window on its right return.

The northwest elevation is single-storey and sits on higher ground. It has a panelled timber door with margined fanlight in the centre bay, a canted window to the right, and a single window in the bay to the left.

The southeast elevation is asymmetrically fenestrated, with a catslide-roofed porch (as described above) on the left, and windows to each floor on the right.

The northeast (rear) elevation has a projecting centre gable with a tall, margined window at ground level and a further window in the gablehead. A narrow light is on the return to the left; slightly set-back flanking, single-storey bays are blank.

The windows are timber sash and case with various glazing patterns including 3-pane, 6-pane, 12-lying-pane, and plate glass. A casement window is located on the right side of the northeast elevation. The roof is covered in grey slates, and has coped, diamond-aligned grouped brick stacks (four to the northwest and three to the southeast) with polygonal cans. The eaves overhang.

The interior retains a good decorative scheme, including decorative plasterwork cornicing, compartmented ceilings, a classical frieze, and panelled shutters. A black marble fireplace with a timber fire surround and a cast-iron horseshoe insert is present, alongside a later Art Nouveau style fireplace with tiled cheeks and a timber overmantel.

Rubble boundary walls with coped, square-section ashlar gatepiers and a pedestrian gate are located on the northwest side.