The new entrance hall gives onto an inner hall within the existing house, a rectangular room on an east-west axis. Two sets of paired Ionic columns divide the hall asymetrically and frame the main entrance. Smaller Corinthian aedicules modelled on the Temple of Vesta at Tivoli (Soane Journal No 4) are at both ends of the room and framing figurative statues raised on strigilated plinths. The eastern end has a shallow cross-vaulted ceiling adjacent to paired arches spanning the hall with decorative soffits and springing from two sets of shallow pilasters (drawing 172). The west aedicule is beneath a segmental arch mirroring its eastern counterpart.

Soane sent drawings of the inner hall to the clerk of works at Bentley Priory, John Pullinger, on 28 and 29 January 1799. These drawings included a plan and section and details of the mouldings.