The back drawing room was at the rear on the first storey of the house.

It is not known if this design was executed as there is no known photographic record of the ceiling prior to demolition.

In this room a chimneypiece was installed which had been designed for the back drawing room at number 1 Royal Terrace (Adam volume 24/26), and survived to be photographed by the LCC in 1936, and was sold at auction in the same year. The frieze from this design was also duplicated in the chimneypiece in the front drawing room at number 8 Royal Terrace, which was photographed by the LCC in 1936. The design does not correspond with Adam’s section of the house (Adam volume 42/61).