Column, Trefoil Centre

The Trefoil Centre's walled garden includes a substantial house dated 1868, with later 19th-century and 20th-century alterations, now serving as a school. Originally a rectangular-plan house, it exhibits architectural details inspired by 17th-century Scottish designs. The house is constructed of honey-coloured sandstone, with roughly squared and textured blocks ("stugged and snecked") and ashlar dressings. Distinctive features include quoins, an eaves band, and corniced windows with chamfered reveals.

The main, north-facing elevation has four irregular bays leading to a lower wing to the right. The central bay features an elaborate doorcase with fluted columns supporting an entablature. Above the door is an armorial plaque within a segmental-headed pediment incorporating Jacobean strapwork detail and urns. A date stone reading "AD 1868" is set into the frieze. Bipartite windows flank the entrance; the right-hand window has a stone mullion, while the left-hand window is larger with both a mullion and transom. Dormer windows are topped with pedimented square panels, consoles, and ball finials. A gable is on the outer left, with symmetrically arranged windows, the upper one featuring strapwork moulding. A lower, asymmetrical wing extends to the west. A metal staircase is accessed through a door on the west wing, and square dormerheads rise to a swept roof. Unsympathetic modern additions extend the building to the north and west.

The east elevation has three bays, with a gable on the left and two bays to the right. Windows are symmetrically placed, and dormerheads are topped with triangular pediments. One central dormer has been enlarged into a door and incorporates a steel fire escape.

The south elevation showcases three asymmetrical bays, a canted window on the outer right at ground level, accessible by a small stone perron staircase with plain curving balusters. The central ground-floor window has been altered to French doors. Two narrow French windows are located on the outer left. Symmetrically placed gabled dormerheads punctuate the roofline. A recessed four-bay block from the later 19th century, with early 20th-century additions, is positioned to the left. To the right are three bays, each with symmetrically disposed gabled dormerheads. A blocked doorway, now a window, sits in the outer-right bay, beneath a segmental canopy pediment supported by large brackets. A full-height canted bay window is positioned on the outer left, with deeply-set openings. French doors are at ground level, 6-pane casement windows at the first floor, and the central first-floor window is barred. More modern additions are present to the west.

Windows throughout are primarily 4-pane and 6-pane sash and case designs, with 6-pane French doors and 2-pane fanlights. Grey slate covers the roof of the main block, while the west range is red pantiled. Ashlar coping tops the skews, and console skewputts feature rope moulding. Corniced sandstone ridge and apex stacks are also present.

High rubble garden walls with harl pointing and semi-circular coping enclose the garden area to the west. A simple pedestrian gate leads from the walled garden in the west to the main garden to the south. This gate features a segmental-shaped pediment with a punched trefoil above the lintel. A free-standing, elaborate ashlar Corinthian column, topped with an eagle statue, stands within the garden south of the house.