Bettisfield Park, including attached garden walls

Bettisfield Park is a substantial Georgian country house of 2 storeys and basement, now surviving in part. The building is constructed of scribed render over an ashlar plinth, with hipped slate roofs behind low parapets on moulded cornices and brick chimney stacks. It follows a roughly L-plan, with a south-facing entrance range and west-facing rear wing enclosing a courtyard at the rear.

The 6-bay entrance front is asymmetrical. The right side contains 3 equal bays with a central entrance, whilst to the left of centre is a wide full-height bow with a domed roof, with 2 equal bays further left. The entrance is approached via stone steps between panelled piers and is sheltered by a Doric portico with square outer columns and fluted inner columns. The portico has an entablature with triglyph frieze and pediment incorporating a re-introduced coat of arms. The entrance doors are half-glazed with margin glazing in a moulded architrave, with overlights of similar detail. Floor-length windows in the lower storey are set in arched recesses with panelled aprons in the plinth, stone entablatures with guttae over notional pilasters, and roundels in the tympana. The bays flanking the entrance contain 15-pane hornless sashes, though the other bays have replacement cross windows. The upper storey has 9-pane hornless sashes below a continuous sill band.

The 4-bay west (garden) front is also asymmetrical. It incorporates a wide full-height bow on the right side, which forms the end of the entrance range, and a rear wing with a balancing advanced bay to the left end beneath a hipped roof. The bow and narrower central bays have cross windows in the lower storey similar to the front elevation, whilst the lefthand bay has a tripartite 15-pane sash window in a similar but wider opening. Steps have been added at the bay left of centre. The upper storey matches the front elevation with 9-pane sashes and sill band.

The 3-bay right side wall of the main range was restored after 19th-century additions were removed, and retains 9-pane sash windows and sill band in the upper storey. At the rear of the house, the ground is lower and entry is at basement level. A hipped projection on the left side was rebuilt after attached 16th and 19th-century parts of the building were demolished, and incorporates a large segmental-headed stair window. Set back at centre is a panel door to the basement, offset to the left, with sash windows to the right: 6-pane in the basement, 12-pane in the lower storey and 9-pane in the upper storey. The rear wing has upper-storey and basement sash windows in its side wall. The end wall, also rebuilt after sections were removed, has two 9-pane sash windows flanking a blind window in the upper storey, with similar windows in the basement. Set back to the left are a basement door, 15-pane sash window in the lower storey and 9-pane window above.

Attached to the northwest end of the rear wing is an L-shaped garden wall of mainly brick with stone coping, which retains the lower courtyard behind the house. The return section has a pointed doorway. Next to the house, the wall incorporates an ashlar projection with 2 round-headed niches and central panel, originally the plinth of a northwest wing.

The interior is sumptuous in neo-classical style and has been well-restored. The entrance hall features a screen with 2 scagliola columns in the Erechtheion Ionic order, and a cornice incorporating swags and aegricania. On the left side is a marble fireplace with overmantel and fluted pilasters. Behind the screen lies an open-well stair with slender brass balusters, fret-cut tread ends and a wreathed handrail. The room to the right of the entrance has panelling that may conceal early cross beams from the 16th-century house, and contains a neo-classical fireplace.

An L-shaped corridor leads from the entrance hall to the left, with a plaster barrel ceiling incorporating roundels and a cornice matching the entrance hall. The morning room, the first room along this corridor, has a white marble Adam-style fireplace with maidens in relief, and a plaster ceiling with a painted roundel to the centre in Italian Renaissance style. It features richly detailed doorcases incorporating entablature with foliage and vase, and panel doors. The large drawing room occupies the left end of the entrance range, with a plaster ceiling incorporating a central oval and corner roundels painted with Italian Renaissance scenes, and a plaster sphinx in relief. The room has 2 pedimented doorcases with fielded-panel doors.

The dining room is located behind the drawing room in the rear wing. It features a screen of 2 Corinthian scagliola columns based on the Tower of the Winds design. The rich plaster panel ceiling incorporates an anthemion cornice and, in a central panel, the 'Slaughter of the Innocents' painted in Dutch Renaissance manner. Behind the dining room was a library, now converted to a kitchen.