Nos. 18 and 20, St John Street

Nos. 18 and 20 on St John Street are a pair of town houses, now used as consulting rooms, dating from the late 18th century and altered over time. They are built of red brick in Flemish bond, with a double-depth plan, each house being single-fronted and featuring coupled back extensions. The buildings rise three storeys above cellars and have a symmetrical six-bay façade, with each house having three windows. They have a plinth and an altered cornice.

In the centre, there are round-headed doorways with open-pedimented Tuscan doorcases, panelled doors, and semi-circular fanlights. The windows have raised sills and flat-arched heads, but the glazing varies between the two houses: No. 18 has sashes with four panes at the ground floor, twelve panes at the first floor, and nine panes above, while No. 20 has altered glazing at the ground floor, twelve-pane sashes at the first floor, and nine-pane top-hung casements at the second floor. The interior has not been inspected. This pair forms part of the terrace on the north side of the street.