The following text is from the original listed building designation:
BOROUGH GREEN
TQ 65 NW Two barns with attached outbuildings 191/5/10003 at Borough Green House 06-JUN-00
GV II
Two barns and outbuilding. Earliest barn to south early C17 with alterations to walls in C18 and reroofing between 1840 and 1860. Attached barn to north of early to mid C19 date and outbuilding to north east South barn was a timberframed threshing barn of three bays with south aisle and outshuts at each end. The lowest part of the stonework is the original plinth but the higher part is an C18 replacement of the timberframed walls. Upper part of the walls is of brickwork and there is a tiled roof with half-hipped ends, the street end having two C19 continuous casements and cross-shaped iron ties. Internally most of the early C17 upright jowled posts, tiebeams and eight curved braces survive. The structure was reroofed and extended in the early to mid C19. At this time a brick barn in Flemish bond with tiled roof was added to the north and a north eastern one storey outbuilding of stone rubble with tiled roof added.
[Sevenoaks District Architectural History report by Anthony D Stoyel 1989 on "The barn of Borough Green House, No 1 Rock Road , Borough Green.]
Listing NGR: TQ6069857126 (1)

Historic England archive material: BF078463 BOROUGH GREEN HOUSE, BOROUGH GREEN

A Wagon lodge occupying the south side of the farmyard, adjacent to but set back from the barn. Thoroughly covered in foliage at time of survey with limited access for inspection and recording. Built between 1850 and 1870, appears to be four and a half bays. Stone rubble, with brick above, peg-tile roof, gabled at ends. Altered 20th century.

Historic england archive material:BF096217 ROCK HOUSE, BOROUGH GREEN

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