The front drawing room would have been located at the front, overlooking the river, on the first storey of the house.

This design was not executed at number 4 Royal Terrace, and instead a marble chimneypiece was installed in the room, which was executed with minor alterations to a design which had been made for the front drawing room of number 3 Royal Terrace (Adam volume 24/33), with a fluted frieze rather than the anthemia and arabesques shown in the drawing. It survived to be photographed by the LCC in 1936 and was sold at auction in the same year. This design is a close variant copy of that designed by Adam in 1769 for the front drawing room at number 25 Grosvenor Square (Adam volume 22/264).

The ceiling in the front drawing room was executed to a close variant of a design intended for the front drawing room at number 7 Royal Terrace (Adam volume 13/33), and was inset with paintings by Antonio Zucchi, four of which were sold at Sotheby’s on 16 October 1993. The ceiling survived to be photographed by the LCC in 1936.