The Reardon Building also known as the Carmel Dairy Building is a Spanish Eclectic style two-story commercial building in downtown Carmel-by-the-Sea, California. Constructed in 1932 for the Carmel Dairy, the building was designed by Guy O. Koepp and built by A. Caryle Stoney. Featuring a tower shaped like a milk bottle, the interior artwork and logos on milk bottles and lunch menus were crafted by local artist Jo Mora. The building is a key cornerstone building at the entrance to Carmel's downtown historic district.

Guy Oran Koepp was an American architect known for his distinctive designs in Carmel-by-the-Sea, California. He played a significant role in shaping the city's character and architecture. Some of his notable works in downtown Carmel include the Coach Building, La Rambla Building, and the old Carmel Dairy.