Wonham Manor

Wonham Manor is a country house situated in Betchworth, dating back to an old core with substantial remodelling in the late 18th century, around 1787, for the Hon. Charles Marsham (later Earl of Romney). Further designs were presented in 1810 by Lewis Wyatt for 19th-century alterations. In 1926, the top storey was removed, and the interiors were remodelled in the early 20th century. The house is constructed of red brick with Roman cement on the ground floor return front and on the battlemented parapets. It has plain tiled roofs, hipped at the centre and left, with hipped slate roofs to the right and rear.

The house has a three-storey central range flanked by two-storey side ranges, with stacks positioned to the left and right of the centre and at the rear. The west front features a three-windowed central range with glazing-bar sash windows under label hoods, all enclosed within cement surrounds. The arrangement includes three windows on the second and first floors, and two windows on the ground floor. A three-quarter glazed door is located on the ground floor right, within a chamfered, rendered surround and a label moulding. Flanking bays are set back slightly; the left bay has a pointed oval window on the first floor above a three-quarter glazed door, while the right bay contains a nine-pane glazing-bar sash window above a four-centre-arched chamfered surround to double doors. A projecting three-window range to the left includes a central tent-roof glazing bar sash angle bay with ogee-head tracery to the glazing bars. A similar angle bay window is present on the right-hand return wall of an extension.

The south front features octagonal angle turrets with castellated tops and a glazed lantern on the centre of the roof. A seven-window arrangement spans the first floor, with four windows being larger, mullioned and transomed casement doors below the left-hand side. The right-hand side has a castellated angle bay with one window on each angle wall and a tripartite window within a moulded surround. The rear elevation incorporates a ribbed, tent-roofed trelliswork pavilion with scalloped cresting and spiked finials to the ground floor left. A central ogee-domed cupola is surmounted by a gilt weathervane with a clock face and flanked by pilasters. A lower range extends to the right.

The interior is largely of 20th-century design, with a replaced staircase, although some panelled walls remain, along with lotus leaf capital columns to the angle bay windows. A bedroom fireplace is crafted from white marble, embellished with egg and dart and dentilled bands, alongside foliage and grotesque scroll bands, and a central relief panel depicting putti. An elaborate wooden fireplace, featuring a scroll garland and floral carved decoration, is situated in a ground floor room, alongside coloured marble fireplaces in the lounge and other rooms. Historical records, including a counterpart of a lease dated 1774, are held at the Surrey Record Office.