Langley Park Including Quadrant Walls, Corner Towers, Pavilions And Orangery.

Langley Park is a large country house built between 1755 and 1758 by Stiff Leadbetter for the 3rd Duke of Marlborough, on the site of a 17th-century Kederminster family residence. The original design, documented in Buckinghamshire County Records Office, was largely ashlar, though much of this was replaced in 1983 with stucco lined to resemble ashlar, under a slate roof behind a balustraded parapet. The house is arranged with a double pile plan over two storeys and an attic.

The east front originally presented a plain seven-window range of sash windows, with the central three bays slightly advanced and topped by a pediment bearing a roundel. A modillion cornice runs along the top. A portico with a stone pediment and balustrade, flanked by glazed openings, was added centrally, along with stone piers each side containing niches. Open loggias with pairs of Tuscan columns extend from the outer piers. Approximately between 1850 and 1860, projecting quadrant wings were added in ashlar, extending from the ground floor. Corner towers, styled after Vanbrugh, rise from the quadrant walls; they are two storeys high with arched openings on each face of the upper floor. Each tower has a cornice and corner pinnacles linked to a central octagonal stone pedestal. Two-storey square pavilions with balustrades and pyramid roofs are situated behind the corner towers.

The south front, dating to the 18th century, features a four-window range with a central pediment. The garden front has a central three-sided, balustraded bay with two windows on each side. A glazed passage connects to a large, mid-19th century orangery which is nine bays long and five bays wide; its detailing mirrors the passage. It has full-height square piers, glazing between them, a plain entablature, and a top balustrade. The balustrade around the house is likely a 19th-century alteration, with ball finials at the angles.

The interior largely retains its 18th-century character, including a screen of Doric columns to the hall, a marble fireplace, a fine cornice, a pedimented doorcase, and a 19th-century mosaic floor. An open-well staircase features Ionic columns and an oval glazed dome with decorative plasterwork. A stone stair with shaped soffits and metal balusters leads up to a stair hall, likely dating to around 1770. Other ground floor rooms retain 18th-century fireplaces, doors, and plasterwork. The upper floor also retains significant 18th-century features, including an octagonal principal room with painted panelling. The attic floor incorporates some reused 17th-century panelling as a dado. A bolection-moulded fireplace is found in the basement, whilst an elaborate, rusticated arched fireplace is located in the ground floor of the south angle pavilion. The house was subdivided internally in 1983.