The following text is from the original listed building designation:
In the entry for;
TQ 54 SW PENSHURST SMARTS HILL 54/866 (Westside) GV South Park Farmhouse including attached barn. II
The entry shall be amended to read;
TQ 54 SW PENSHURST SMARTS HILL 54/866 (Westside) GV South Park Farmhouse including attached Barn. II*
Farmhouse and barn. C16, remodelled and extended 1850-1 by George Devey C16 part weatherboarded with tile roofs, half-hipped to barn; brick axial stack; 1850-1 extension half timbered with plaster infill, steep tile roof and brick stack with diagonally-set flues. C16 barn incorporating part of farmhouse at east end, with 1850-1 extension set at right angles to east. Vernacular Revival style. Two storey gabled front of 1850-1 extension has carved bargeboards, ornamental framing and jettied first floor with 3-light window set over porch with fluted round posts and plank door set in arched frame. Attached barn has C20 casements (to farmhouse) to left of central plank double doors; lean - to roof to outshots swept around front, sides and rear of right end of barn. Interior not inspected. Part of a picturesque group of exceptional importance, one of the earliest works of George Devey whose vernacular revival worK marked "a milestone in nineteenth century architecture" (M Girovard, The Victorian Country House); these buildings are also notable for the combination of the picturesque style with a farmstead which is remarkably advanced for its date.
1. 5280 PENSHURST SMARTS HILL (West Side)
South Park Farmhouse including attached barn TQ 54 SW 54/866
II GV
2. Mid C19 east extension to C16 building, part of which is now the 2-bay western part of the farmhouse while the other part is a barn. The picturesque C19 part is half timbered with plaster filling, has steep tiled roof and overhanging 1st floor on fluted round posts. The C16 part is weatherboarded with tiled roofs, as is its continuation into the barn. Barn has fairly close set timbers and queen post roof trusses. Brick and stone foundation. Lean-to front projection at right continues around west end. Aisle and hipped porch to left. This range is part of a deep, U-shaped range of farm buildings of immense picturesqueness, probably by George Devey.
South Park Farmhouse and attached barn, Range of buildings at East end of farmyard and shelter sheds on North side of Farmyard form a group.
Listing NGR: TQ5229442695 (3)

Description from record TQ 54 SW 28 :
(TQ 52304268 - Inf. Kent SMR) South Park Farmhouse, Smarts Hill. Farmhouse and barn, 16th century. remodelled and extended 1850-1 by George Devey. The 16th century part is weatherboarded with a tile roof. The mid-19th century extension is half-timberd with plaster infill. Listed Grade II. (1) Upgraded to Listed Grade II*. (2)

Historic England archive material: Object Number Object Title Scope And Contt BF111242 South Park Farm, Smarts Hill, Penshurst File contains reports with the following reference numbers: South Park Farm KFS-000025, Barn KFS-000025/1, Covered yard KFS-000025/2, South West Stables KFS-000025/3, Forge KFS-000025/4, North East stables KFS-000025/5, North West Shelter KFS-000025/6, Dung pit KFS-000025/7 and also includes 19 photocopied external surveyor's 35mm prints.

<1> DOE (HHR) Sevenoaks (OS Card Reference). SKE40609.

<2> DOE (HHR) Sevenoaks (amendment letter 14.1.91) (OS Card Reference). SKE40610.

<3> English Heritage, List of Buildings of Special Architectural or Historic Interest (Map). SKE16160.