20 and 21, Southtown

20 and 21 Southtown are a pair of small houses built around 1820. They are constructed from stone rubble with a stucco front that is lightly textured to resemble ashlar. The left end and party wall have stacks with rendered brick chimney shafts, and the roof is covered with slate.

The houses have a double-depth plan, with No.21 being one room wide and No.20 two rooms wide, featuring a central entrance hall. The exterior is three storeys high with a five-bay front and a three-window range on the first floor. On the ground floor, there are three windows alternating with two doorways. The doorways are particularly fine, recessed slightly, and have timber doorcases with panelled pilasters and scroll consoles that support open-pediment hoods. The doors are fielded six-panel designs; No.21 has an overlight beneath the pediment, while No.20 has glass in the top panels of its door.

Above the doorways, a richly-moulded timber cornice runs across the front at the first-floor level. The left end bay features the front windows for No.21, with a ground-floor horned twelve-pane sash and original sixteen-pane sashes on the upper floors. The windows of No.20 are symmetrically arranged around the central doorway, with paired horned twelve-pane sashes on the ground floor, although all upper windows were replaced in the late 20th century with aluminium windows designed to mimic four-pane sashes. The roof has plain sprocketed eaves and is hipped at both ends.

Inside, only parts of the ground floor are accessible for inspection, revealing plain carpentry and joinery details where visible. According to the occupant of No.22, these houses were built for the coachman and servants of that house.