The Castle (St Johns College Roman Catholic School)

The Castle, also known as Grove House, is a villa that is now part of St John's College Roman Catholic School in Southsea, Portsmouth. It was built in 1835, likely by T.E. Owen. The building is finished in stucco with a concealed roof and features a brick stack on the right side.

The exterior is two storeys high with three bays, the third bay being wider than the others. On the left side, there are two tall casement windows, each set under a flat rendered arch with a drip-stone label, although the figured stops are missing from the left side of the left window and the left side of the right window. On the first floor, there are two mullioned sash windows also under dripstone labels, with a cornice band and a crenellated parapet above.

To the right, within a slightly projecting bay, there is a two-storey tripartite canted bay window. This features a fixed centre casement on the ground floor and a sash window on the first floor, flanked by narrow sashes. The bay has a moulded cornice and a first-floor sill, above which are cusped incised panels, a cornice, and a crenellated parapet. The low-pitched facing parapet adds to the design.

On the left return, there is a three-storey octagonal turret with four blinded doorways, each topped with a 4-centred arch and linked dripmoulds that have head stops at the springing of the arches. The spandrels are panelled, and the turret features miniature crenellation. At the top, the turret has mock-machicolation and a crenellated parapet.

On the left side of the turret, there are two blinded casements with labels and head stops, and on the first floor, there are two sashes set in plain chambered surrounds. The far left wall terminates with a corbelled projection resembling a turret, and the parapet features pointed mock-machicolation and stepped merlons. There are 20th-century entrance doors at the rear. The interior has not been inspected.