23 Walker Street, Edinburgh

25 Walker Street in Edinburgh is a notable building designed by Robert Brown between 1826 and 1827. It features a 12-bay terrace with a cohesive façade made up of two-storey townhouses that include attics and basements. The three-bay classical townhouses have main doors and common stair flats located behind them. Notably, Nos. 25 and 27 have a later addition of an ashlar attic storey. The basement area, which is visible from the street, includes some vaulted cellars and retaining walls.

The building is constructed from sandstone ashlar, with droved ashlar used for the basement and channelled ashlar at the ground level. The entrance platforms extend over the basement, and there are band courses at both the ground and first floors, along with a string course at the first floor between the windows. The eaves are corniced, and there is a balustraded parapet on the right side. The doors are timber, featuring six panels set within square-headed doorpieces, accompanied by rectangular fanlights. Rectangular dormers are located to the right, and there are cast-iron balconies supported by foliate brackets at the first-floor windows.

The west (rear) elevation is four storeys high and constructed with regularly coursed rubble, accented by some long and short ashlar quoins. The wall plane is both advanced and recessed, with some later additions. Ashlar rybats, lintels, and sills frame the irregular fenestration, some of which have relieving arches. The left side features plate glass in timber sash and case windows, while the right side has 12-pane and 6-over-9-pane sash and case windows. The roof is a double pitch M-section covered with grey slates, and there are corniced ashlar gable end stacks topped with modern clay cans. Cast-iron railings with spear-headed finials edge the basement recess to the street, above ashlar coping stones. Additionally, the building has cast-iron rainwater goods.