Bonaly Primary School Annexe, 2A Thorburn Road, Edinburgh

This is a single-storey, irregular-plan Board School annexe, built in 1891 with an addition of 1912, located in Edinburgh. The original design is attributed to Robert Wilson, with the 1912 addition by John A Carfrae. It is constructed in a cottage style, with a swept roof, numerous bargeboarded gables, tall windows, and ridge vents. The building is primarily of snecked sandstone rubble with red sandstone ashlar dressings, with roughcast on the south elevation. A base course is present, along with long and short quoins. Window and door openings are chamfered, and the 1891 section features decorative terracotta finials with ball-tops to the gable apexes.

The north elevation, which serves as the main entrance, is symmetrical. A prominent, three-bay gable is centred, featuring tall, paired windows within pointed arch openings, with plain roundels in the tympanum and a relieving arch above. Further, three-bay sections flank the central gable, with swept roofs and smaller gables with king-posted bargeboards above timber-boarded doors in shouldered, stop-chamfered surrounds. Bipartite and single windows flank the doors, while a tall, gabled, bipartite window breaks the eaves in a recessed section at the outer bays. Battered stacks are located above.

The east elevation features an advanced two-window gable of the original 1891 building towards the outer right. To the left is the 1912 addition, with a three-bay gable centred, featuring a tall central bipartite window beneath a relieving arch and tall flanking windows. A flat-roofed link building connects to a two-leaf timber panelled door within a roll-moulded architrave, and a bipartite window. A single bay occupies the far left.

The west side elevation presents a recessed three-bay 1912 gable to the right with a tall, central bipartite window below a relieving arch and flanking tall windows. An advanced two-gabled 1891 building precedes this, featuring a king-posted, gabled, transomed and mullioned bipartite window with pointed-arched lights that breaks the eaves. A two-window gable occupies the outer left.

The south rear elevation, dating to 1912, displays a stepped composition of three sections. A three-bay gable is centred with a central bipartite and flanking windows; a blind gable is advanced to the right with a gablehead stack; and a long bay is recessed to the left with a single window.

Predominantly 12- and 18-pane glazing is found in timber sash and case windows. Coped stacks feature red and yellow clay cans. Deep bracketed eaves are present, and the 1891 building displays decorative bargeboards, while the 1912 addition has plain bargeboards. The roof is covered with graded grey slate and red terracotta ridge tiles.

Inside, a large central hall boasts arched trusses, roof lights, and a removable glazed screen to an adjacent classroom.

Associated outbuildings include a small rubble outbuilding to the south (formerly a lavatory) with a pitched leaded roof and four timber-boarded doors. A coped random rubble boundary wall encloses the property.