Garden Walls of Brompton Grange with Main Gateway and Garden Buildings

The garden walls of Brompton Grange, along with the main gateway and garden buildings, date from the early to mid-19th century. They are constructed from coursed rubble, ashlar, cast iron, and wrought iron. The walls feature a gateway in the west wall, a summerhouse in the south-west corner, and a garden shed in the south-east corner. The tall coursed rubble walls have slab coping along the west, east, and north sides of the garden, with the main gateway flanked by convex quadrants. To the south, there is a lower rubble wall with segmental ashlar coping. The intermediate and junction piers have classically-moulded caps and cast-iron finials.

The summerhouse is made of coursed watershot rubble, featuring a curving rear wall and a canted front with keyed round-arched openings. It has stone brackets that support a slab cornice and a parapet with ashlar coping. Inside, there is a corbelled slab ceiling and a three-sided seat with a cast-iron "bamboo" frame. The garden shed has a similar plan but includes a boarded door with arcaded panelling on the north side and blind round-arched openings on the other two sides, with a vent featuring a cast-iron grille on the west side.

The gateway is flanked by chamfered rusticated ashlar square-plan gate piers topped with hemispherical cast-iron finials. It features a pair of wrought-iron carriage gates with segmental-curved tops and spear finials, with scrolls on the rails, hung from hollow square-section lattice gate posts made of cast iron. There are also matching wrought-iron side gates. The ironwork was created by James Flint of Richmond, who lived at Brompton Grange.