J W and J Hay, 1853; addition of vestry and session room, 1878; porch added by William Leiper, 1892; restored (following a fire) by Robert Wemyss, 1924. Squat cruciform-plan Gothic church with ornate crocketted porch to E elevation and 3-stage tower with broach stone spire in re-entrant angle of S transept. Stugged, snecked grey, creamn and red sandstone; cream stugged and snecked sandstone to porch; cream ashlar dressings. Base course; pointed-arch windows breaking eaves with gabled dormerheads, 2-light cusped bar tracery; saw-tooth coped off-set buttresses with cusped gablets; angle finialled and crocketted buttresses to porch; diagonal buttresses to tower.
E (COLQUHOUN STREET/ENTRANCE) ELEVATION: gabled with projecting porch to centre, see below; 5-light pointed-arch window above with curvilinear tracery; narrow windows with cusped tracery flanking porch.
PORCH: heavymoulded cornice (stepped on returns) with floreated eaves course; 2 windows to E face divided by buttress to centre, each with 2-light plate tracery with floreated hollow chamfered releals, hoodmoulds with carved head label-stops. Pointed-arch doorway on return to right and left, each with moulded chamfered reveals, 2-leaf boarded doors, decorative iron hinges, handle and keyholes.
S (SIDE) ELEVATION: 2 dormerheaded aisle windows to right. Gable transept advanced to left with tower in re-entrant angle, see below. 4-light window with curvilinear tracery to transept. Gabled bay recessed to left of transept with tripartite window at ground and 2 lancets with cusped tracery above.
E ELEVATION; pointed-arch doorway with flanking colonnettes, moulded reveals with floreate moulding, 2-leaf boarded doors, decorative iron hinges. 4-centred-arch window above with cusped 2-light bar tracery. S elevation; similar detailed 4-centred-arch window at ground;l arrowloop window with cusped tracery above; canted stair turret to left with stepped stair lights. Row 3 small windows with cusped tracery to each face at belfry stage. Short angle buttresses to upper stage with octagonal piers above with octagonal caps. Tall narrow louvred 2-light bar tracery gabled lucarnes with clock to each face below windows.
W ELEVATION: canted apse over basement to centre, doorway to far right, bipartite window to outer right with cusped tracery to each light, doorway to far left. Pointed-arch windows breaking eaves with gabled dormerheads to apse, 2-light bar tracery, basement doorway on return to left, bipartite window to basement on return to left. Session house to outer left in re-entrant angle of N transept, see below.
N elevation: 2 4-canted-arch windows with 2-light bar tracery; similarly detailed but taller window to gabled W return.
N ELEVATION: gabled transept to right detailed as S transept. 4-centred-arch doorway in re-entrant angle to left, trefoil window to right, taller gabled bay to outer right breaking eaves with small lancet window with cusped tracery. 3 aisle windows detailed as S elevation, divided by buttresses; coped stack with advanced chimney wall abutting side of window to outer left.
Lead-pane glazing, stained glass, see below. Grey/green slate roof, saw-tooth coped skews, finialled and cusped gablet skewputts. Original rainwater goods, dormers to transepts; fleche.
INTERIOR: rich interior panelled throughout; plaster and timber-beamed vaulted roof, beams supported on stone corbels; gallery supported on 2 cast-iron columns to each transept. Stencil and gold leaf decoration (1926) to chancel. Stained glass: apse, 3 windows (12 Apostles), circa 1926. N wall, (L to R), (Christian Act of Mercy) by Gordon MacWurter Webster, 1931; (figurative panel) possibly by Guthrie and Wells, circa 1890. W window, (Christ Blessing the Little Children) circa 1890. Dormer windows in transepts, to right, (Columba, Giles, Francis), to left (Crucifixion) by MacWurter Webster, circa 1954. S transept, commemorative windo w to John Logie Baird, by Arthur D Spiers, 1988. BOUNDARY WALL AND GATEPIERS: stugged, snecked cream and grey sandstone wall, ashlar coped. Square piers with stop-chamfered angles, low pyramidal caps.