20, Northampton Street

No. 20 Northampton Street is a house built after 1819, with a later addition of a second floor and 20th-century alterations. It was designed by GP Manners. The house features limestone ashlar on the front and rear, a double pile parapeted roof, and double Roman tiles on the front, which are not visible from the rear. The right gable wall is coped, and there are two ashlar stacks on the party wall to the left. It is the uppermost house in the row, with stacks on the right gable wall, which is now rendered, and a section of ashlar wall for the next house. There is a staircase at the rear.

The exterior has three storeys and a basement with a two-window front. The first floor has two two-over-two sash windows in plain reveals with stone sills and wrought iron balconettes; the window on the right is narrower. The second floor has two similar windows without balconettes. On the ground floor, to the left, there is one similar window with a wrought iron balconette, and to the right, a six-panel door with reeded and fielded panels featuring voided corners, topped by a single pane fanlight in a round-headed chamfered reveal. A wrought iron footscraper is attached to the left. There is a 20th-century window in the basement, which is partially above ground and has grating in the pavement. The building has a moulded cornice over the first floor, a lintel at the eaves, and a coped parapet. The rear elevation includes two-over-two and plate glass horned sashes, and there is an ashlar extension off the staircase leading to the second half-landing.

The interior has not been inspected. The history of Northampton Street and the adjacent development began around 1791, designed by Thomas Baldwin as a trustee for William Pulteney. The development continued from 1794 after the bankruptcy of the principal contractors, with elevations on leases signed by Thomas Chantry and John Pinch, marking his first major work. The street was completed after 1819, with plans and elevations on leases signed by GP Manners. The lower part of the street was significantly impacted by bomb damage in 1942 and subsequent redevelopment.