Southleigh Park, Clock Tower building

Southleigh Park's Clock Tower building is a mid-19th century outbuilding, possibly a former stable, featuring a clock tower dated 1840 with 20th-century alterations. The structure is built from coursed flint with red brick quoins and dressings, and has a stucco plinth and platt band, topped with a Welsh slate roof and a wooden clock tower.

The building is one and a half storeys tall and consists of three bays, with a single-storey wing to the right. The outer bays are taller and slightly project below the oversailing gables. Each outer bay is framed by giant pilasters and features a segmental archway, which includes a ground-floor doorway and a small window above. The left bay has a full-width door with a heightened opening above that serves as a fire door. The right bay has a half-glazed door with a small-pane overlight, and above it is a cambered-arched six-pane sash window. The central bay contains a wide doorway with a small-pane overlight and flanking flat-arched six-pane sashes, with the right sash altered. Above the door is an oculus with radial glazing bars. The roof extends in front of the central bay, supported by slender columns, and features decorative pendants on the cross-beams.

At the center of the front roof slope rises a two-stage clock tower, which has a clock face below a bell stage supported by Tuscan columns, adorned with a frieze and cornice. It is topped with a shallow pyramidal roof that carries a weather vane with a ball base, scrolled brackets, an arrow vane, and a spike finial. There is a chimney at the right end, and to the right, a single-storey flat-roofed wing that is canted at the end.

At the rear of the building, there is a brick and glass corridor built in 1983 that connects the building to the main house and to an office building, both of which are not included in the listing.

Inside, the building has been significantly altered during a conversion to office space in the 1970s, but a wooden stair remains. The clock features a dial with the manufacturer's name and date: "Paine. High Street Bloomsbury. 1840".