Over 4,000 bags of cement were used, and in some places agricultural lime was used instead of sand for less water seepage. The thinnest inside wall is 19 inches. The thinnest outside wall is 25 inches. The roof is greater than 3 feet thick, and the floor is greater than 4 feet thick. The roof alone supposedly weighs 423 tons.
All walls are load bearing.
There are 14 rooms and a two-car underground garage, for a total of about 3,000 square feet under roof. The upstairs has 7 chimney flues. In November of 1943, Wright Road was widened, and the city tore down the entire wall facing the street. Mr. Nicholson promptly rebuilt it 6 feet further back. A small white frame house that currently sits on the back lot was originally next to the Castle.