6 Forth Street, Edinburgh

4 Forth Street in Edinburgh is a classical tenement building constructed between 1819 and 1820. It features a 12-bay design arranged in groups of three, three, and six, and stands three stories tall with a basement and an attic for No 4. The building is made of droved sandstone ashlar and includes a cill band at the ground level, a band course between the ground and first floors, projecting cills, an eaves cornice, and entrance platts that overhang the basement.

The principal elevation showcases a three-bay shopfront at No 4, which has a consoled cornice above the fascia. The left outer bay contains an entrance with a tall panelled door and a fanlight, while the stair entrance to the right also features a consoled cornice. The adjacent bays include pilasters and a cornice with scrolled mullions. In bay 5, there is a pilastered and corniced doorpiece with paired timber panelled doors and rectangular fanlights, originally designed as a single door. Bays 10 and 11 have linked pilastered and corniced doorpieces with segmental-arched fanlights, with a round arch to the right. The remaining bays have regular fenestration, and above, there are two canted tripartite dormers for No 4, with regular fenestration in the second-floor additions.

The east elevation facing Hart Street has three bays, with windows on the ground and first floors blinded, and a window to the left and center above. The north elevation, facing Hart Street Lane, features regular fenestration with unusually tall windows in the outer left bay (No 10). There is a substantial addition at the rear of No 4, which is three stories high with a piend roof and irregularly spaced pointed arch windows, accessed from Hart Street Lane.

The windows are timber sash and case with 12-pane glazing on the first floor, while the ground and attic levels have plate glass. The roof is covered with grey slates, and there are gablehead and ridge stacks with terracotta cans, along with decorative cast-iron railings.

The boundary walls consist of coped rubble garden walls at the rear. The interior was not seen during the last inspection in 1998.