The following text is from the original listed building designation:
LAMBERHURST FURNACE LANE TQ 6635-6735 (north side) 9/156 Furnace Farmhouse GV II
House. Early C16, clad early C18 and extended mid C19. Main range timber framed and clad with red and blue chequered brick on ground floor on dressed stone base and with C19 rat-trap bond to right return and tile hung first floor. Extended with red and blue brick. Plain tiled roof. A late Wealden or early continuous jettied house in origin. Two storeys on plinth with hipped roof and gabled wing to left with moulded bargeboards and with stacks to rear left and clustered to rear centre. Two 3 light wooden casements on each floor of main range and blocked garret window in wing with glazing bar sash and wooden casement on first floor and glazing bar sash on ground floor with half-glazed door to right in arched surround and large flat roofed porch. Later C19 canted bay to left return. Interior: full frame visible with stop chamfered main beams and mortices for jetty, returned to right return on dragon beam, the jettied wall plate to the right return elevation is retained behind the C19 cladding. Roof of unmoulded crown post trusses arch braced to tie beams, with soot blackening in chimney bay, suggesting a former smoke bay. Inglenook fireplaces with stencilled designs on chimney breast.
Listing NGR: TQ6666135578

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