John M Aitken, 1902, with additions of 1933. Symmetrical Scots Baronial former school comprising 3-storey, 3-bay principal block with lower 3-storey, 2-bay wings flanking to N and S, each with 2-storey, 10-bay classroom wing extending from rear (W) giving U-plan. Stugged, squared and snecked sandstone walls with stugged, droved and polished ashlar dressings and details. Base course, string course articulated around lintels at ground, cill course at 1st floor, string and eaves courses at 2nd floor.
E (PRINCIPAL) ELEVATION: centre bay of principal block gabled and slightly advanced; modern pointed-arched opening at ground; modern inscription with flanking quatrefoil decoration over lintel, hoodmould articulated around segmental-arched panel above, containing inscription reading "CENTRAL PUBLIC SCHOOL 1902". 4-light mullioned and transomed windows at floors above; hoodmould articulated around pointed-arched panel bearing burgh arms at 2nd floor lintel. Transomed bipartite windows at all floors in flanking bays; those at 2nd floor with pointed-arched lintels. Framed stone plaque at ground to outer right with inscription reading "Foundation Stone Laid 7th August 1901 by John M Aitken, Arch." Circular bartizans with blind arrowslits, quatrefoils, and machicolated and corniced eaves corbelled out at corners and framing 2nd floor. 3-storey 2-bay wings recessed at right and left; concrete covered steps with stugged and coped sandstone balustrades accessing pointed-arched doors adjacent to re-entrant angle with "GIRLS" and "BOYS" inscribed on lintels; single windows centred above at 2nd floor, bipartite windows at each floor in bays to outer left and right.
N ELEVATION: gable end of principal block with bipartite mullioned and transomed window to outer left of elevation, and centring gablehead at 2nd floor. Gable of N wing with bipartite windows at each floor to outer left, stair windows at outer right. Classroom wing extending to right; 10 bays, grouped 3-3-4 with bipartite windows inserted in centre bays of 3-bay groups.
S ELEVATION: mirrored image of N elevation except for no bipartite windows inserted in 3-bay groups of classroom wing.
Modern glazing throughout. Purple-grey slate roofs; square lantern centring ridges of principal block comprising slate-hung battered base, louvered timber sides, corniced at eaves with bell-cast pyramidal roof surmounted by bird weathervane. Conical bell-cast roofs with ball finials to bartizans. Crowstepped E gable of principal block with octagonal shaft finial engaged at apex. Crowstepped skew copes flanking coped 2-flue apex stacks with circular cans to principal block and wings. Ashlar skew copes to classroom wings; coped single-flue apex stacks with circular cans.
INTERIOR: symmetrically disposed timber stairs in N and S wings; turned spindles and newels with urn finials. Pyramidal cupola over central hall at 1st floor, formerly galleried with balustrade around. Basket-arched arcaded screen to E, staircase behind with decorative cast-iron balusters and timber handrail. Vertically-boarded timber wainscoting and pointed-arched door openings to classrooms; panelled doors with 6-pane uppers.
PLAYSHELTERS: oriented N-S, and flanking rear wings of main building. Purple grey slate roofs; basket-arched openings now infilled.
BOUNDARY WALLS: coped random rubble retaining wall to King Harald Street surmounted by iron railings with finialled stanchions. Flanking gatepiers with droved ashlar piers comprising stop-chamfered shafts with bases and pyramidal caps; 2-leaf iron gates, 3 cast-iron lamp standards remaining. Wall terminated to N and S by matching piers. Coped random rubble boundary walls to N and S.