The Delta Athenaeum has been listed on the National Register of Historic Places as the "Kansas City Athenaeum Club House" since 1979. With three levels and 15,000 square feet of office and event space, the Grecian architectural building is well-preserved with most of its original features.

The main level features a spacious grand foyer with custom-designed tile flooring, as well as two classic parlor rooms adorned with fireplaces and meeting space for 15-20 attendees.

The two-story ballroom/auditorium, with velvet-curtained stage and seating for up to 250 guests, is renowned for its magnificent chandeliers and colossal stained glass windows.  At the rear of the ballroom is a newly-equipped catering prep area for banquet service.

The third-floor balcony music room overlooks the ballroom and has capacity of 100 guests. With a barrel-vault ceiling and sliding windowed-wall enclosure, the balcony room was originally commissioned as a concert hall for the Conservatory of Music. The third floor also features a bridal suite at the top of a red-carpeted stairway for an elegant wedding processional.

The ground level entrance on the first floor enhances the accessibility of office space and a large multi-purpose room. An elaborate stone fireplace provides an impressive backdrop for receptions and assemblies in the multi-purpose room. The first floor is replete with an expansive commercial kitchen that has served as the home for many of Kansas City’s most popular caterers. 

Recent renovations to the first floor and main level of the Athenaeum have improved access for guests with disabilities.