The following text is from the original listed building designation:
TR 05 SE CHILHAM MOUNTAIN STREET (east side)
4/16 Heron Manor and Monkton Cottage
II
Hall house, former cottage row, now cottage pair. Circa 1500 with C18 and C20 alterations. Timber framed, part clad in painted brick with plain tile roof. 2 storeys on plinth; hipped roof with gablets and 2 C20 sloping dormers to right. Left end stack, centre left ridge stack and rear stack to right. 6 framed bays, with C20 catslide outshot to left. Early C18 left end bay, timber framed with ground floor of painted brick. Original hall house of 4 framed bays with screens passage, now blocked and with stack inserted. Large panelled framing with tension braces, the right end bay probably originally end-jettied, now underbuilt with painted brick. Irregular fenestration of 6 windows, sash and casements. Three C20 plank and panelled doors, in left end bay, bay second from left, and bay second from right.
Listing NGR: TR0706153325 (1)

Description from record TR 05 SE 51:
Probably dating from the first quarter of the c16. Although the hall was almost certainly open to start with, it contained a timber chimney stack. In the post medieval period, various additions have been made to the S and E of the house

Description from record TR 05 SE 52:
Probably dating to the first quarter of the C16. In the post medieval period, various additions have been made to the S and E of the original house

Originally a 5-bay house, now of 7 bays with a formerly open 2-bay hall and timber chimney or smoke bay in the 3rd hall bay. The upper end was formerly jettied. (2)

Historic England archive material: RCH01/048/01/192 Labelled sheet of drawings of Monkton Cottage and Heron Manor, Chilham, with a sketch plan of the ground-floor, a crown-post elevation, and detail sections of a fireplace bressumer and the main ceiling beam BF008829 MONKTON COTTAGE, CHILHAM

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

<2> Pearson, S., Barnwell, P. S. & Adams, A. T., 1994, A Gazetteer of Medieval Houses in Kent (Monograph). SKE8010.