Dunard, 17 Thornly Park Avenue, Paisley

Dunard is a large house dating from 1902, with an additional wing built around 1920. It is a two-story and attic building arranged in a three-bay, L-plan layout, featuring a piend roof and a distinctive bellcast conical-roofed round tower. The exterior is whitewashed harl with ashlar dressings, and includes a dividing course. Stone mullions are present throughout.

The south elevation, the main facade, showcases a decorative cast-iron finial on the circular tower, which has a battered base and three windows on each level. A broad, advanced piended bay is located to the left of the centre, featuring a flat-roofed five-light canted ashlar window and a door with a return to the right; a tripartite window sits above the first floor. A set-back bay is centred and incorporates a later lean-to conservatory, while a full-height projecting chimney breast is flanked by smaller windows at the first floor and a flat-roofed four-light dormer.

The east, or entrance, elevation has principal bays to the left with a semicircular, flat-roofed porch with a blocking course, molded doorpiece, a panelled timber door, and a small window to the right. Bipartite windows flank the bays, with a single window above, and a further bipartite to the right. A later projecting wing extends to the right, with two single windows off-centre to the ground floor and a single window to the left and a bipartite to the right on each upper floor.

The west elevation is notable for a narrow gabled bay with two windows at ground level and a bipartite window on the first floor, with mock half-timbering to the gablehead. A smaller window sits slightly set-back to the right, under a single-story lean-to roof. Broad flanking bays, the one on the right set-back, have two shallow horizontal windows to the ground floor and two narrow lights on each side at the first floor.

The north, or rear, elevation is stepped and incorporates a variety of architectural elements, including a double-piended bay at the left with a canopied door in the centre, and a four-light canted ashlar window (the outer right light acting as a door) at ground level, with a tripartite window above.

The majority of windows have a nine-pane glazing pattern in the upper sashes, paired with plate glass in the lower sashes, all within timber sash and case windows. The roof is covered in grey slates, and the chimneys have coped harl stacks with cans. There are also overhanging eaves.

The interior retains a fine decorative scheme, including decorative and plain cornices, timber fireplaces with original tiles and grates, picture rails, brass door furniture, sash lifts, some original pendant light fittings, and many original keys with labelled fobs. A screen door leads to a panelled hall with a timber arch, a fireplace with an overmantel incorporating beaten copper Art Nouveau panels, and a timber dog-leg staircase. The dining room features dado panelling, a timber fire surround and overmantel, deep-set horizontal windows, and an open-beamed ceiling. The drawing room exhibits a classical emphasis with decorative plasterwork panels and a carved fire surround. The kitchen features a semicircular serving hatch and a maids' bell-box. The attic billiard room has a windmill incorporated in the coloured glass of the upper door panel, a circular rooflight and a timber fireplace.

The property is bounded by saddleback-coped stepped red brick walls with flat-coped square-section ashlar gatepiers.