Alexander Thomson, 1851-4, alterations John Honeyman, 1869 with substantial Baronial additions by William Leiper, 1896-7. 3-storey over basement mid 19th century Scots Baronial house; rectangular-plan; whinstone and sandstone rubble with polished sandstone margins and dressings; deep basement; corbelled eaves cornice; stepped string courses, hoodmoulds, eaves band, Jacobethan detailing; roll-moulded and chamfered reveals; crowstepped gables; candle-snuffer roofs, lead caps, finials on turrets, bartizans and towers.
W ELEVATION: 3-bay asymmetrical original villa elevation. 2-storey over deep basement gabled to outer left, roll-moulded round-headed window at ground to right, canted oriel window on deeply-moulded corbelling at 1st floor, corbelled string course, window directly above in gable, triangular pediment. Taller 2-bay tower block to outer right, bartizans, that to left corbelled from principal floor level, that to right at parapet level. Windows symmetrically disposed, 2 small windows at ground, principal floor windows with moulded arrises, Jacobethan detail above lintel (stained glass upper panes), balustraded balcony on boldly moulded corbels, upper floor windows with ashlar panels inset in architrave. Stugged, squared ashlar parapet, bracketted eaves cornice, rope-moulding; bartizan to left with small windows, stepped string course, that to right blank.
E ELEVATION: 1896, 2-bay, parapetted tower block on deep, battered base to outer right, with lower narrow block to left. Blind arrowslit in battered base to right of tower, blank plaque at centre of upper stage. Entrance bay to left of tower, slightly advanced elaborate, 2-tiered, pedimented doorpiece with roll-moulded arrises; round-headed door, roll-moulding, hollow chamfer, heavy 2-leaf panelled oak door, cast-iron hinges, 2 round-headed, multi-paned leaded lights directly above, inscription in pediment 'as built on rock so be our lives?. Flanking round-headed, multi-paned windows, decorative panel above, monogram JTS at centre of panel to left, datestone 1896 to right. Pediment of doorpiece abuts into corbelling of 2-storey canted oriel directly above, roll-moulded transoms and mullions, leaded glass at principal floor level, smaller window at upper floor. Ashlar battlemented parapet; crowstepped gable rising from within, 2 dormers symmetrically disposed, broken segmental-headed pediment, triangulated finials. Lower narrow gable to left with 2-stage squat corner tower to outer left; ashlar stair leading to shoulder-arched, roll-moulded door on SE side; stepped string course, narrow windows, plaque.
S ELEVATION: original villa to left with Leiper addition to right. Narrow gable to outer left, battlemented bow at ground to left, pedimented window at centre of gable; lower crowstepped gabled porch advanced to right, balustraded stair to round-headed door, armorial escutcheon above. 2-stage tower rising above canted block in re-entrant angle to right, 1855 datestone above 1st floor window. Window at basement, principal and upper floor to right, segmental-headed dormer to right; lower block abutting to outer right, single window at basement, tripartite window at principal floor, pedimented dormerhead at upper stage. 1896 block to right, lower block with 2 segmental-headed arches at ground, dormerhead with broken segmental-headed pediment, gablet over; wallhead stack rising to right, balustraded stair and tower to outer right.
N ELEVATION: tall tower block on double basement, canted oriel window corbelled from principal floor upwards, parapet, crowtepped gable. Lower 2-bay block to right, transomed and mullioned windows. Taller block to right, gable with corner turret at left, canted oriel with ashlar roof at principal floor, plaque in gable; windows symmetrically disposed in bay to outer right.
2-pane, 4-pane, 6-pane over plate glass sash and case windows, leaded windows. Grey slate roof, lead flashings; tall and broad wallhead, ridge stacks, octagonal cans.
INTERIOR: elaborate Leiperian interior; entrance tower heavily carved wooden staircase, pierced wooden frieze; hydraulic powered lift. Banqueting hall; music room on 1st floor with wagon roof, stencilled purlins, painted celing of celestial design, elaborate painted processional frieze (oak and pine), arched braces carried on carved pilasters, carved masonry consoled impost blocks; carved wooden chimneypieces; panelled dado; minstrels? gallery at NW end, decorative cast-iron work; mosaic tiled bathroom, original fittings; original light fittings; attic bedrooms with Art Nouveau cast-iron fireplaces. Original boiler for lift in basement dungeon.
BOUNDARY WALL AND GATEPIERS: rubble wall with harl-pointing, boulder and mortar coping; ashlar gatepiers with pyramidal caps, large ball finials; elaborate wrought-iron gates with plain pointed railings.
BALUSTRADE AND BIRD BATH: curved, honey-coloured sandstone arcaded, ashlar balustrade, slab coping. Elaborately carved bird bath placed at centre of terrace, squat column, fruit garlands, cherub heads, dentilled capital; large basin with fluted shell base, acanthus leaf carving.