5 Forrest Hill Road and 41 Forrest Road (Former Territorial Army Centre and University of Edinburgh, School of Artificial Intelligence), Edinburgh

This is a three-storey building with attic, built in phases between 1872 and 1923, incorporating even earlier fabric. It combines a former drill hall with administrative offices and retains elements of a former Edinburgh Charity Workhouse. The architects involved were Duncan Menzies of Stewart and Menzies (1872), Cooper and Taylor (1904–5), and James Morris (1923).

The building displays Scots Baronial characteristics with an asymmetrical plan. Its construction comprises random rubble with ashlar sandstone dressings including quoins, crowstepped gables with gablehead stacks topped with circular cans, and predominantly small-pane glazing in timber sash and case windows throughout. The roof is finished with graded grey slates.

The 1872 drill hall, situated to the left of the later administrative block, is nine bays with interior dimensions of 135 by 96 feet (41 by 29 metres). The bays are divided by iron girders spanning the full width of the hall. The building occupies an enclosed site that is only partially visible from the street.

The principal northeast elevation features a wide segmentally-arched open porch with an ashlar-coped stepped battlement incorporating cable hoodmoulding and a carved inscription. Above this is a bronze inscription set within a thistle-finalled aedicule. To the left is a carved stone plaque bearing the City of Edinburgh arms, with the regimental crest on the right. Timber panelled doors occupy the re-entrant angles of the porch. The central bay displays tripartite windows at ground, first and second floor levels, with a bipartite window above set in a gabled dormerhead breaking the eaves. To the left stands a small ground-level window with a two-storey bowed tower corbelled out above.

The south wing extends three bays and incorporates a remnant of the former Edinburgh Charity Workhouse. It comprises random rubble with ashlar dressings and regularly spaced window openings. A flat-arched pend with a relieving arch occupies the ground level of the recessed outer left bay, with a large two-leaf timber door at the centre.

The northwest elevation, facing Greyfriars Churchyard, has projecting gabled single-bay blocks to the outer corners with seven irregularly fenestrated bays between them.

The southwest elevation features stone-transomed windows at first floor level, with the windows to the second bay from the right forming a mullioned and transomed tripartite arrangement. Slightly advanced gabled crowstepped outer blocks with irregular fenestration flank this section. The right block has a small second-floor window, whilst the left block incorporates corbelled-out bartizans with small blind openings at second-floor level to both right and left. Later bipartite dormers to the attic break the roofline.

The southeast elevation contains two bays with two windows at second-floor level and gabled dormerheads breaking the eaves.

The interior, inspected in 2015, retains several 19th-century features including a central dog-leg stone staircase with simple metal railings and timber banister, timber panelled doors, and simple cornicing to principal rooms. The former drill hall office spaces were moderately altered in the late 20th century to accommodate offices and classrooms for the University of Edinburgh. In 2014, the drill hall space was subdivided to create a mezzanine forming two floors.