The following text is from the original listed building designation:
1. 944 CASTLE STREET (North West Side)
Nos 68 and 68a TR 1457 NE 4/264 3.5.67.
II* GV
2. Dated 1847, but this can only refer to the buildings refacing. Early C18. 2 storeys, basement and attics red brick. Old tiled roof with 2 end stacks and curved gable on left side. 2 curved dormers. Panelled parapet. 6 sashes with keystones on lst floor. Central, lst floor window has a brick surround and curved gable. Stringcourse. Plinth. Doorcase has a keystone and quoins and rectangular fanlight. The interior has spiral turned balustor, 2 to each tread on cut string with shaped brackets, swept rail and column newels. Early C19 mantelpieces.
Nos 68 to 77 (consec) and Nos 80 to 82 (consec) form a group.
Listing NGR: TR1470457607 (1)

Description from record TR 15 NW 62:
No 68 & 68a Castle Street. (TR 14705760-OS 1:2500 1957). Grade II*. Dated 1847, but this can only refer to the buildings refacing. Early C18. 2 storeys, basement and attics red brick. Old tiled roof with 2 end stacks and curved gable on left side. 2 curved dormers. Panelled parapet. 6 sashes with keystones on 1st floor. Central 1st floor window has a brick surround and curved gable. Stringcourse. Plinth. Doorcase has a keystone and quoins and rectangular fanlight. The interior has spiral turned baluster, 2 to each tread on cut string with shaped brackets, swept rail and column newels. Early C19 mantelpieces. (2)

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

<2> DOE (HHR) City of Canterbury Kent Sept 1973 58 (OS Card Reference). SKE40116.