5 Commercial Street

5 Commercial Street is a four-storey building with a cellar, which includes three two-storey industrial houses and a two-storey, six-bay flannel factory above. The houses at Nos 5 and 6 are symmetrical, while No 7 was originally back-to-back with a tunnel passage between them. The building is constructed of Flemish bond brick and features a gently pitched slate roof with pitch daubing. It has a saw-toothed eaves cornice and plain barge boards, with brick stacks at both ends.

The factory windows on the fourth floor have three-light timber casements set below the eaves, while the third floor windows are similar but have cambered header arches. The first and ground floors feature small paned iron cross windows with cambered gauged brick voussoirs, shallow reveals, and no sills. The cellars also have cambered header arches.

The doorcases have dripboards supported by brackets, with six-panel doors for Nos 5 and 6 and a later four-panel door for No 7. There are stone staircases with iron railings and a round arch leading to the tunnel passage. The windows at the rear are mostly modern, and there are plank doors along with wash houses and latrines in the yard. A separate external timber stair provides access to the factory floors, which house the collection of the Newtown Textile Museum.