The United States Custom House (also known as the Old Customs House) in San Ysidro, San Diego, California, is a 1933 Spanish Revival building located 50 feet (15 m) north of the Mexico–United States border at the San Ysidro Port of Entry. It is listed on the National Register of Historic Places with the full historic name U.S. Inspection Station/U.S. Custom House and common name U.S. Custom House.The Custom House was part of a large federal building program begun in 1926 during the Herbert Hoover administration in which 1,300 new federal buildings were constructed. The building was designed by the Supervising Architect's office of the Treasury Department; construction was performed by Robert E. McKee of El Paso, Texas, who was paid $93,800. Groundbreaking was in early summer 1932. In May 1933 the building was complete; it was quietly put into use without a formal dedication ceremony. Photo by Carol Highsmith, 2022.