15 Walker Street, Edinburgh

11 Walker Street in Edinburgh is an impressive terrace built between 1822 and 1825 by Robert Brown. This nine-bay structure features a cohesive façade of two- and three-storey classical townhouses, complete with an attic and basement. The design includes main-door and common stair flats at the back, with a slightly advanced corner block to the south that returns to William Street. Notably, there is a later ashlar attic storey added to No. 15. The basement area includes some vaulted cellars and retaining walls.

The building is constructed from sandstone ashlar, with droved ashlar at the basement and channelled ashlar at the ground floor. The entrance platts overhang the basement, and there is a base course along the bottom. A banded cill course at the first floor is complemented by a string course above the windows. The eaves are corniced, and the parapet is plain, stepping at the corner. The doors are timber, featuring six panels, and the doorpieces are square-headed with rectangular fanlights that have plain glazing. The centre of the corner block has an architraved, corniced, and bracketed opening. Additionally, there are cast-iron balconies on foliate brackets at the first-floor windows.

On the William Street elevation, the building rises three storeys and has three bays. It is made of squared coursed rubble with droved ashlar long and short quoins. Each floor features a single window in the centre, with stone cills and lintels.

The west (rear) elevation is four storeys high and constructed of regular coursed rubble, also featuring long and short ashlar quoins. This elevation has an advanced and recessed wall plane with some later additions. Ashlar rybats, lintels, and sills frame the irregular fenestration, some of which have relieving arches.

The windows predominantly consist of plate glass set in timber sash and case frames. The roof is a mansard style covered with grey slates, featuring a double pitch M-section design. Wallhead stacks are made of corniced ashlar with modern clay cans. The basement recess to the street is edged with ashlar coping stone and topped with cast-iron railings that have spear-headed finials. There are also cast-iron rainwater goods.