The Santa Fe Building is one of the oldest buildings in downtown Amarillo, Texas, U.S.A. It was completed on January 18, 1930 and had the regional offices of the Atchison, Topeka and Santa Fe Railway company. The Amarillo office of the railroad company supervised more than 5,800 miles (9,334 km) of railroads. Brennan Construction Company of Amarillo and Dallas built the building from 1928 to 1930 with an original construction cost of US$1.5 million.