Hanover House

Hanover House is a former convent of the Sisters of Mercy, now used as an office. It was built in the late 18th century and altered in the mid-19th century, with a wing added around 1860 by Edward Welby Pugin. The building is constructed of brick with stone dressings and has slate roofs. The late Georgian style block is extended by a Gothic-style range from around 1860.

The 18th-century section is three storeys high and features a three-window range. It has a first-floor sill band, a mid-19th-century cogged brick cornice, and a gable with a slot in the second and third bays. The windows have rubbed brick flat arches and 12-pane sash windows, with mid-19th-century four-pane sashes on the second floor. To the right, there is a round-headed entrance with a Doric aedicule, a fanlight, and a six-panel door. The building has a similar four-window return facing St John's Square, with some blocked windows and two mid-19th-century gables.

The 1860 range to the right is three storeys tall and has five gabled bays, articulated by offset buttresses. The ground floor features segmental-headed stone-mullioned windows with three lights, shouldered lintels, and transoms. The first floor has two-light pointed windows with plate tracery and transoms, while the second floor has cusped lancets. There are two lateral stacks that are corbelled out between the second and third bays and the fourth and fifth bays, with corbelled caps. The right return has a canted porch between the buttresses, with an entrance that includes sidelights and an overlight, leading to a half-glazed door. The rear of the building is similar in style.

Inside the 18th-century part, there is a staircase with stick balusters and an open string, along with moulded cornices and panelled doors.