A mural painting by Mary Adshead on the east wall depicts incidents in Plymouth's history.
The main staircase rises opposite the main entrance doors. It is cantilevered from a central beam of reinforced concrete. The treads, risers and moulded handrail are of afrormosia, a West African wood, and it has a metal balustrade of bronze and stainless steel with panels of toughened plate glass.
The Council Chamber is designed to seat 90 members on five sides of an octagon so that all members are within a set minimum distance from the Lord Mayor. The seating for the Officers of the Council is in recesses below the public gallery. Tables and fixed seating is of Burma teak with lacquered brass metalwork. The