List of McCoy's Building Supply Stores in San Marcos, TX Outlet Note Regular Brands McCoy's Building Supply Texas San Marcos Rating 4.7 based on 83 votes Official Website https://www.mccoys.com/ Products Tools Hardware Building Materials Painting NameAddressPhone Name/Address/Phone McCoy's Building Supply outlet - San Marcos 1200 N Interstate 35 (512) 353-5400 McCoy's Building Supply outlet - San Marcos 110 Wonder World Dr (512) 396-1755 People Also Viewed