On the interior, the original Parlor & Billiard Rooms, formerly contemporary exhibition spaces, were restored to their original appearance. Replication of lost architectural ornament and millwork includes replica mantelpieces following the design of Daniel Pabst, draperies, lighting, and ceiling stenciling.

With only black & white archival photos to refer to, the issue of 'colorizing' the interior became a major interpretation and replication issue. Extensive research in England of wallpapers produced for export determined that the designer of the original wallcoverings in the Parlor Room was Bruce Talbert, a contemporary of William Morris, allowing for an accurate replication around which parlor ceiling stencils, furnishing fabrics and carpets could be coordinated and specially produced. 

The stained-glass Gothic sunflower laylight over the central staircase was also restored by removing a lower ceiling which had closed off an upper balcony.