17, Portland Street

No. 17 Portland Street is a former Wesleyan Chapel, later used as a school, and now a warehouse, dating from approximately 1825 to 1834. It was designed by William Thomas and built by John Toone for Revd J Entwistle Jr. The building is constructed of reddish-brown brick with a painted stucco front facade, rubbed red brick dressings to the side facade, and a Welsh slate roof.

The main range is two storeys high with three bays, accompanied by narrower, single-bay ranges on either side. The front facade features giant Tuscan pilasters marking the corners. The first floor has a central projection, with a stepped band above it surmounted by pilasters. A central arcade of three round-arched windows, each with eight panes to the sashes and Gothic glazing to the heads, sits on a continuous moulded sill incorporating Tuscan pilasters and tooled archivolts. Single windows of a similar design are present in the outer bays, with moulded sills on anthemion feet. An entablature above includes a frieze with four bay-leaf wreaths, a blocking course, and an upshot sloping to the sides. The ground floor has a wide central entrance, now containing 20th-century garage doors, and side entrances with steps leading to ten-fielded-panel doors in plain reveals, within architraves supporting a cornice and flat, raised "pediments".

The side ranges feature tall, narrow round-arched windows with sixteen panes and Gothic glazing. The rear gable has an oculus, and a rear extension presents a similar arcade of three long, narrow windows with eighteen panes and radial glazing to the heads, surmounted by a pediment.

Inside, cast-iron columns remain on the ground floor, and a dado remains on the first floor. The roof structure consists of king post rafters, hammer posts, collar beams, and six sets of roof timbers.

Portland Street itself was laid out between 1823 and 1824.