The following text is from the original listed building designation:
NETTLESTEAD GIBBS HILL TQ 65 SE (North side) 1/1 Rock Farm House II
Farmhouse. C17 or earlier, with C19 facade. Front elevation red and grey brick in Flemish bond. Left gable end has broadly-spaced studding with red and grey brick infilling to ground floor, and tile-hung first floor. First floor of rear elevation rendered. Plain tile roof. 2 storeys, garret and basement. Stone plinth to left gable end, brick plinth to front. Half-hipped roof. Multiple red and grey brick stack towards right end. Irregular fenestration of 5 casements; two three-light and one two-light to left of stack, one single-light under stack, and one three-light to right. Segmental heads to ground-floor casements. Door with four flush panels and two top lights, with splayed rubbed brick voussoirs, in gabled red brick porch with bargeboards under stack. Two-storey rear addition to right. Two-storey rendered rear wing or stair turret with half-hipped roof behind and to left of stack. Rear lean-to to left. Interior not inspected.
Listing NGR: TQ6818052613

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