Although little evidence on the interior of the mansion during the Sinclair era exists, the available information reveals extensive changes by the Douglases. Victorian ornateness gave way to the more simplistic decoration style of the Edwardian Era.
The Douglases hired Chicago architect Howard Van Doren Shaw to oversee $30,000 of renovations, including:
Shifting the mansion entrance from the First Avenue side to the Linden Drive side
Installing butternut paneling and faux ceiling beams in the Great Hall
Adding porches on the east and west sides of the mansion
Developing the North Terrace and removing the conservatory
Enclosing the Servants’ Porch and constructing a service yard
Adding Shaw’s trademark “Baskets of Plenty” to the mansion’s interior and the throughout estate
Removing several stained glass windows and simplifying elaborate cabinets in the Dining Room
Replacing the gas lighting with electric lighting
Adding an electric refrigerator, a significantly modern upgrade in 1925