11 Rothesay Mews

12 Rothesay Mews is a late 19th and early 20th century mews building with later attic additions. It is a two-storey structure featuring an extensive range of gabled roughly two-bay buildings, along with a piended single-storey section to the west. The building is set on a cobbled lane that slopes down to the northeast. The exterior is made of coursed squared and snecked sandstone rubble with ashlar dressings, showcasing long and short rybats and chamfered openings.

The large rectangular cart-shed openings have timber doors, some of which include glazed upper sections, while others have later timber, steel, and glazed infill. The doorways are irregularly spaced and feature narrow transomed multi-pane fanlights. There are small windows above some of the openings on the right side (west). The first floor has single large windows, with some former hayloft doors that originally had transomed lights, many of which are now infilled. The building has a stepped moulded eaves course and round-arched pediments on the gables, with bipartite windows that break the eaves and are centered above the cart-shed openings.

On the south (rear) elevation, the building is two storeys and set into a steep bank that falls away to the north. This side is constructed of coursed random rubble with some ashlar dressings and features irregular fenestration, including some later additions. There is a prominent shouldered wallhead stack on the left (west) side.

The windows are predominantly 12-pane timber sash and case. The roof consists of multiple pitches with lead ridges and grey slates, along with alternating corniced sandstone ashlar ridge and gable end stacks, some topped with octagonal clay cans. The building also has cast-iron rainwater goods.