The following text is from the original listed building designation:
TQ 75 NE DETLING HERMITAGE LANE (east side)
5/126 The Old Cottage
II
House. C15. Timber framed. Rear elevation: clad in brick in English bond on ground floor, rendered on first floor, with plain tile roof. 2 storeys on plinth. Roof hipped both ends, right end with gablet, leaving only short ridge. Large brick stack at right end with base in English bond, now enclosed by brick lean-to with plain-tile roof. 2 eaves dormers towards right end with small 2-light casements on first floor beneath. C20 half-glazed door slightly off-centre to left. Possibly 3 timber-framed bays. Weatherboarded lean-to to street elevation.
Listing NGR: TQ7979559786 (1)

Description from record TQ 75 NE 178 :
A house of three bays, probably C16, over which there is a re-set medieval roof

Historic England archive material: BF008559 THE OLD COTTAGE, DETLINGRCH01/048/01/225 Labelled sketch plan of the ground-floor of the Old Cottage, Detling

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