William Smith of Aberdeen, 1860-1, with alterations, 1924. 2-storey asymmetrical Tudor school with French Baronial details, comprising 4-bay centre block with 2-stage entrance tower; flanking single storey and attic wings, 4-bay wing to left (S), 5-bay wing at right (N) with 2-stage tower in re-entrant angle. Harl-pointed stugged rubble walls with droved sandstone ashlar dressings and details. Base course, chamfered arrises and sloping cills to windows.
NE (PRINCIPAL) ELEVATION: asymmetrical, 4 bays with gabled bays to outer right and left. Bay to left; 2-storey 3-light gothic traceried canted oriel, with heavily corbelled base, lintel course and cornice above; engaged octagonal shaft surmounted by ball finial at gablehead. PRINCIPAL TOWER: open at ground; stone steps accessing concrete-covered platt, vertically-boarded timber entrance door with plate glass fanlight above. Base course, buttressed N corner, band course at 1st floor, string course, machicolated cornice and blocking course at eaves. NE face; pointed-arch opening at ground, polished pink granite plaque (see notes) inset above with hoodmould over; blank panel inset in band course above, circular clock face set in square frame centred at upper stage. NW face; pointed-arch opening at ground, hoodmoulded window above, 2 narrow windows at upper stage. Pointed-arch 3-light window in bay to right, 3-light window at 1st floor, gabled dormer breaking eaves with shield carving in gablehead and ball finial at apex. Bay to outer right slightly advanced; 4-light canted bay with battered base course and crenellated parapet, hoodmoulded window at 1st floor in crowstepped gable with fleur-de-lys finial at apex.
NW ELEVATION: N wing advanced at right, 2-stage tower in re-entrant angle to left; square lower stage with pointed-arch door (with stone steps) and window at ground floor faces, narrow windows in octagonal upper stage, string course and dentilled cornice at eaves. 2 closely- spaced bays immediately to left, blind basement window in left bay, adjoining gabled dormerheads breaking eaves.
SE ELEVATION: S wing advanced at left, gabled entrance porch with stone steps and pointed-arched door in re-entrant angle to right. Large window with gothic tracery adjacent to right.
SW (REAR) ELEVATION: 2-storey, 2-bay gable at outer right with 2-storey addition advanced at left.
N WING: single storey and attic, 5-bay principal (NE) elevation, symmetrical except for tower in bay to outer left; regular fenestration in bays to right with pointed-arch windows at ground and gabled dormers breaking eaves. 2-bay (NW) gable end; pointed-arched windows at ground, chimneybreast corbelled out at 1st floor. Regularly fenestrated rear elevation except for centre bay blank at ground and stair window at intermediate level in bay to outer right, gabled dormers breaking eaves.
S WING: single storey and attic, 4-bay principal (NE) elevation, symmetrical except for porch in bay to outer right; vertically-boarded timber door with plate glass fanlight above; regular fenestration in bays to left with pointed-arch windows at ground and gabled dormers breaking eaves. Gable matching N wing. Regularly fenestrated rear elevation except for blank at ground in inner left bay, gabled dormers breaking eaves.
4-pane and plate glass timber sash and case windows with timber mullions to most openings; multi-pane timber sash and case windows at ground floor of rear elevation and later addition. Multi-pane mullioned windows with cusped lower lights to library and entrance porch (leaded glazing). Grey slate roofs to main block, wings and dormers, cast-iron gutters and downpipes with hoppers. Bell-cast square pyramidal roof with cast-iron brattishing around platform to principal tower, bell-cast octagonal pyramidal roof with finial to N tower, roof of addition piended to S, lead roof to oriel. Polished ashlar stacks, each with string course, corniced cope and octagonal cans; incised vertical channelling to principal 4-flue stack.
INTERIOR: vertically-boarded timber wainscoting throughout, panelled doors with 6-pane glazed uppers. Galleried hall, timber balustrade with turned spindles at 1st floor, pyramidal cupola over, doors off gallery set in pointed-arch recesses. Timber staircases with turned spindles and ball finials to newels. Hammerbeam roof to library, hammerbeams and hammerposts decorated with bosses, wall-posts bearing on semi-octagonal corbels.
BOUNDARY WALLS: random rubble boundary walls with ashlar cope to N and S. Stugged ashlar dwarf wall to Twageos Road with ogee ashlar cope and cast-iron railing above; wall terminated to N and S by square ashlar piers with pyramidal caps; square ashlar gatepiers (currently dismantled 1995) with pyramidal caps. Random rubble retaining wall with ashlar cope immediately to rear of N wing.