The following text is from the original listed building designation:
1. 5280 SEAL UNDERRIVER
Black Charles TQ 5552 26/1090 10.9.54.
II* GV
2. Restored late mediaeval hall house, witn later C16 chimney and ceiling. 2 storeys and attic, irregular windows. High pitched tiled roof. Moulded wood eaves cornice. One gabled dormer. Tile hung 1st floor. Brick ground floor with stone plinth. Leased casement windows. Projecting 2-storey porch. Left extension formerly an outbuilding. Right extension, probably of C17, with random stone ground floor, tile hanging above. Sun assurance sign on eaves cornice. Inside mugh panelling: imported linenfold in left extension, plain Elizabethan in central room, Queen Anne period elsewhere. Much exposed timber including remains of screens passage; and carved crown post. Many assembly marks on timbers. Restored inglenook. Former jettied right end, with C16 window, vmsible inside C17 extension. Carved figure, possibly representing a thresher, on bay post in entrance hall. Black Charles, Outbuilding and Wall form a group. Listing NGR: TQ5552052406 (1)

Description from record TQ 55 SE 29 :
(TQ 55525241) Black Charles (NAT) (2) 5280 SEAL UNDERRIVER Black Charles TQ 5552 26/1090 10.9.54. II* GV 2. Restored late medieval hall house, with later C16 chimney and ceiling. 2 storeys and attic, irregular windows. High pitched tiled roof. Moulded wood eaves cornice. One gabled dormer. Tile hung 1st floor. Brick ground floor with stone plinth. Leased casement windows. Projecting 2-storey porch. Left extension formerly an outbuilding. Right extension, probably of C17, with random stone ground floor, tile hanging above. Sun assurance sign on eaves cornice. Inside mugh panelling: imported linenfold in left extension, plain Elizabethan in central room, Queen Anne period elsewhere. Much exposed timber including remains of screens passage; and carved crown post. Many assembly marks on timbers. Restored inglenook. Former jettied right end, with C16 window, vmsible inside C17 extension. Carved figure, possibly representing a thresher, on bay post in entrance hall. 5280 SEAL UNDERRIVER Garden Wall in front of Black Charles TQ 5552 26/1092 II GV 2. C17 or early C18 wall of galletted large random rubble masonry with red brick coping. (3) Not mentioned in The Buildings of England. (4)

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

<2> OS 1:10,560 1969 (OS Card Reference). SKE48146.

<3> DOE (HHR) Dist. of Sevenoaks R.D. Kent. Jan. 1975 278 (OS Card Reference). SKE40440.

<4> Bldgs of Eng W Kent and the Weald 1980 (J Newman) (OS Card Reference). SKE37967.