For an asking price of $20 million, someone could become Warren Buffett's landlord.

The 15-story Kiewit Plaza in Omaha, Nebraska, recently went up for sale, and that could be the going price, according to Omaha.com. The 176,000-square-foot office tower is home to Buffett's Berkshire Hathaway as well as Kiewit, a construction and mining company that built the structure in 1961. Berkshire takes up a floor of the building. It was previously reported that daughter Susan Buffett's Sherwood Foundation was moving out of the building to locate elsewhere.

Kiewit, which has 20,000 employees, is building a new headquarters in another part of the city and will move out in 2021, the report said.