[2] The State Room, which would have been the main showpiece for Langton as mayor, is notable for its fireplace, its doorway, and its plaster ceiling.

The fireplace has double fluted ionic columns supporting a wide frieze in three parts.

[3] The doorway is of mahogany, a rare material in England at this time, with columns inlaid with ivory and mother-of-pearl.

[5][6] Most of the interior fittings were removed and installed in New Place, Shirrell Heath, Hampshire, a house designed by Edwin Lutyens specifically for this purpose.

The house was commissioned by Mrs A. S. Franklyn in 1904, who had inherited Langton House from her father, a partner in the tobacco firm Franklyn, Morgan and Davy[6][7] The fittings included the State Room, the less elaborate Dining Room, and a staircase with heraldic beasts surmounting the newel posts.