The following text is from the original listed building designation:
NORTHBOURNE UPDOWN TR 35 SW
4/48 Updown House and 11.10.63 attached outbuildings
GV II
House. Early C18, remodelled c.1786. Rendered with slate roof. Main elevation of 3 storeys on plinth with cornice and parapet supported by pilaster quoins. Stacks at end left and at end right. Regular fenestration of 3 half-sized glazing bar sashes on second floor, 3 full sized on first floor and 2 on ground floor, all with louvred shutters. Central window in elliptically arched recess, with segmental pediments over first floor windows to left and to right. Central Doric porch with coupled columns and cast iron balcony. Half-glazed doors with Chinoiserie style tracery. Recessed wing to right, 2 storeys and attic, with parapet to mansard roof and flat roof dormer, and 1 shuttered glazing bar sash on each floor in elliptically headed recess, the upper window with a pediment over. Stair turret on left return, with 1 glazing bar sash on ground and first floor and blank roundel above, with heavy cornice and frieze on giant pilaster quoins. Rear wing with kneelered parapet gable. Interior. moulded ceiling joists and inglenooks survive from early C18. Pillared staircase hall and plain bolection moulded marble fireplaces survive -from later C18. Originally fitted up as Gentleman's seat by Captain Thomas Fagg of Dover before 1748, sold to and improved by Matthew Colet Esq. before 1777, and largely given present form by John Minet Fectorof Dover c.1786, who also emparked the surrounding land. (See Hasted,X, 1800, p.41-42). Used as Dower House to Northbourne Court (Igglesden,XIX, 1926, p.79).
Listing NGR: TR3142153393

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