The following text is from the original listed building designation:
CALVERLEY PARK 1. 1746 No 12 TQ 5839 SE 7/125 20.5.52. II* GV 2. Early C19. 2 storeys, built of Tunbridge Wells stone quarried in large blocks. Slate roof with eaves cornice. 6 sashes. Canted bay projection of 3 sashes at the east end with hipped roof. The west wing has a stone verandah with obtusely-pointed arches. Victorian additions behind the house which are now No 12A. Nos 1 to 24 (consec) form a group with Keston Lodge and Victoria Lodge. Listing NGR: TQ5897939317 (1)

Description from record TQ 53 NE 22 :
(Sited to TQ 58983932 from OS 1:1250 1973) 1746 CALVERLEY PARK 2. The layout of Calverley Park and the individual houses in it were designed by Decimus Burton. The general design was made in 1828 and the houses were built during the next 10 years. The town planning of the estate is excellent but the houses vary considerably in style and quality. 1746 CALVERLEY PARK No 12 TQ 5839 SE 7/125 20.5.52. II* GV 2. Early C19. 2 storeys, built of Tunbridge Wells stone quarried in large blocks. Slate roof with eaves cornice. 6 sashes. Canted bay projection of 3 sashes at the east end with hipped roof. The west wing has a stone verandah with obtusely-pointed arches. Victorian additions behind the house which are now No 12A.(2) General description of villas in Calverley Park. (3)

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

<2> DOE(HHR) Dist of Tunbridge Wells June 1974 5,9 (OS Card Reference). SKE41101.

<3> Bldgs of Eng W Kent & the Weald 1980 585 (J Newman) (OS Card Reference). SKE37922.