Tramway Power Station, 179 Constitution Street, Aberdeen

Jenkins and Marr, 1885; substantially remodelled by City Architects Department, 1920. Long rectangular plan building with asymmetrical classical 2-storey, 7-bay principal elevation; single storey (predominantly double-height) to rear. Tooled coursed granite ashlar with finely finished margins to principal elevation; coursed granite rubble, Aberdeen bond in some areas, to remainder. Bull-faced base course; ground floor cill course; dividing band between ground and 1st floors; 1st floor cill course; band course above 1st floor; eaves cornice / band.

SE (PRINCIPAL) ELEVATION: to centre, advanced 3-bay pedimented central block; to ground floor, to centre bay, pilastered and architraved doorpiece with stone steps leading to modern glazed door; to left and right bays, corniced single windows. To 1st floor, to centre bay, bipartite corniced window flanked to left and right bays by corniced single windows; to centre of pediment, blind oculus with moulded surround. To left of central block, stepped down recessed 2-bay linking section; to left bay, large opening with glazed doors and infill screen, modern glazed canopy above; to right bay, single windows to ground and 1st floors. To far left, advanced single-bay pavilion with shallow segmentally-arched opening, with modern glazing infill, to ground floor; single window to 1st floor. To right of central block, recessed single bay block with pediment to centre flanked by lower shaped skews; to centre, double-height basket-arched opening with raised bull-faced long and short quoins and voussoirs, infilled by modern glazed screen and door; modern glazed canopy between ground and 1st floors.

To far right, single storey flat-roofed section; Aberdeen-bond granite ashlar; door to centre.

NW (REAR) ELEVATION: formed of 2 gables; advanced gable to left of predominantly modern construction; blank gable to right.

NE (SIDE) ELEVATION: predominantly blank elevation; advanced to left, 5-bay single-storey building (see above).

SW (SIDE) ELEVATION: predominantly blank; advanced section to right; modern brick lean-to extension to ground floor to left.

GLAZING etc: predominantly modern glazing in metal frames. Predominantly grey slate pitched roofs; some corrugated roof coverings to rear; predominantly stone skews. Corniced masonry wallhead stacks to left and right of central block; corniced gable-head apex stack to rear of central block.

INTERIOR: to interior of centre block, dog-leg stair with ornate cast-iron balusters to upper flight and landing; some timber panelling to stair and landing; to 1st floor landing, pilastered and architraved round-arched opening. Remainder of interior now largely open plan, with modern additions and mezzanine floor.