The following text is from the original listed building designation:
1. 5280 SUNDRIDGE SUNDRIDGE Combe Bank Road (West Side)
Combe Bank (Convent of the Holy Child Jesus) TQ 4855 32/1259 10.9.54.
I
2. The original building, 2nd quarter of C18 by Roger Morris. 5-bay Palladian villa with 2 and a half-storey side bays, under low pyramidal roofs, 2-storey centre with balustraded parapet, pyramidal slated roof and central cupola. Sash windows with glazing bars in moulded architraves, those on ground floor rusticated, and with pediments in side bays. Rendered elevations with stone quoins and dressings. Ground floor porch and Ionic screen added by Norman Shaw circa 1900. Similar 5-bay left return. Pedimented projecting centre on garden front. Inside several rooms of modest size retain complete original decorations; ie chimney pieces, panelling and enrichments to doors and windows; and coved ceilings with ornamental plaster work. Graceful wrought iron staircase in late C18 style. House built for Col John Campbell, afterwards Duke of Argyle. In 1879-80 it was owned by Dr William Spottiswoode the President of the Royal Society, who had the Saloon redecorated by Walter Crane as a library. Very rich, in bronze, silver and gold, with an early C17 Venetian frieze of putti. Fireplace signed and dated 1880, and all completely preserved. North addition of 1807 contains drawing room and ballroom (the latter now a chapel) with convincing Adam style decoration by Walter Cave. The house was the childhood home of Cardinal Manning.
Listing NGR: TQ4803955747 (1)

Description from record TQ 45 NE 14 :
(TQ 48045577) Coombe Bank Convent (NAT) (2) 5280 SUNDRIDGE SUNDRIDGE Coombe Bank Road (West Side) Coombe Bank (Convent of the Holy Child Jesus) TQ 4855 32/1259 10.9.54. I 2. The original building, 2nd quarter of C18 by Roger Morris. 5-bay Palladian villa with 2 and a half-storey side bays, under low pyramidal roofs, 2-storey centre with balustraded parapet, pyramidal slated roof and central cupola. Sash windows with glazing bars in moulded architraves, those on ground floor rusticated and with pediments in side bays. Rendered elevations with stone quoins and dressings. Ground floor porch and Ionic screen addded by Norman Shaw circa 1900. Similar 5-bay left return. Pedimented projecting centre on garden front. Inside several rooms of modest size retain complete original decorations; ie chimney pieces, panelling and enrichments to doors and windows; and coved ceilings with ornamental plaster work. Graceful wrought iron staircase in late C18 style. House built for Col John Campbell, afterwards Duke of Argyle. In 1879-80 it was owned by Dr William Spottiswoode the President of the Royal Society, who had the Saloon redecorated by Walter Crane as a library. Very rich, in bronze, silver and gold, with and early c17 Venetian frieze of putti. Fireplace signed and dated 1880, and all completely preserved. North addition of 1807 contains drawing room and ballroom (the latter now a chapel) with convincing Adam style decoration by Walter Cave. The house was the childhood home of Cardinal Manning. (3) Coombe Bank. The best expression of second generation Palladianism in the county, built by Roger Morris for Colonel John Campbell, who in 1761 became the fourth Duke of Argyll. The exact date of the building is not known. Full architectural description. (4)

Evaluation of site of proposed school buildings. The work revealed evidence for landscaping of the grounds during the 18thC or later, as well as a number of possible garden bedding trenches.(5)

<1> English Heritage, List of Buildings of Special Architectural or Historic Interest (Map). SKE16160.

<2> OS 1:2500 1965 (OS Card Reference). SKE48207.

<3> DOE(HHR) Dist of Sevenoaks RD Kent Jan 1975 324 (OS Card Reference). SKE41036.

<4> Bldgs of Eng W Kent and the Weald 1980 554-556 illus (J Newman) (OS Card Reference). SKE38018.

<5> Oxford Archaeological Unit, 2001, Combe Bank School, Sundridge, Evaluation Report (Unpublished document). SKE7425.