The following text is from the original listed building designation:
HORSMONDEN MAIDSTONE ROAD TQ 74 SW (east side) 1/72 Westernhanger 20.10.54 GV II
House. C15 altered and extended C16. Timber framed and exposed with plaster infill. Plain tiled roof. Wealden hall house, the hall infilled and the whole extended with a continuous jettied wing. The Wealden lies hip end to the road, with 4 framed bays of 2 storeys, the centre bays infilled with close studding, the rest panelled frame with tension bracing with jetty to right and returned to right, the left end wing obscured by C20 outshot. Hipped roof. Irregular wooden casements and C20 door in outshot. Roadside elevation consists of the return jettied bay of the Wealden with blocked mullioned window and 3 light wooden casement on first floor and 2 light casement on ground floor, and a 3 bay continuous jettied extension, close studded with a moulded bresummer and gabled roof with stack cluster to end right in a small framed bay, possibly originally a smoke bay. Blocked mullioned windows ranged under eaves, with 2 and 3 light wooden casements on first floor and 3 light casement on ground floor, with rib and stud door to left in four centred arched opening and identical blocked opening to right of that, either for another door or a window.
Listing NGR: TQ7063441612 (1)

Description from record TQ 74 SW 13 :
Timber-framed house, probably c1500

Historic England archive material: BF039688 WESTENHANGER, MAIDSTONE ROAD, HORSMONDEN

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