In the early 1960s, Greystone was on the real estate market for $100,000, but WATE-TV 6 was able to buy it for only $75,000.
During the transition from WATE's old facilities to Greystone, the station renovated the house and restored much of Greystone to its original design. These renovations included repairing termite-infested floors and removing carpet covering the original wood floors.
Greystone was originally 12,900 square feet, but WATE added 13,000 square feet to the back of the house for the current studio.
In 1992, an additional 4,000 square feet was added to the studio area.
Full renovation and restoration of the house took two years and cost $1.5 million. The station preserved the entire first floor, leaving the current floorplan very similar to the original.
In April of 1973, the Tennessee Historical Commission entered Greystone Mansion (under the name “Camp House”) to the United States Department of Interior’s National Register of Historic Places.