The Larkin House is a historic house at 464 Calle Principal in Monterey, California. Built in 1835 by Thomas O. Larkin, it is claimed to be the first two-story house in all of California, with a design combining Spanish Colonial building methods with New England architectural features to create the popular Monterey Colonial style of architecture. The Larkin House is both a National and a California Historical Landmark, and is a featured property of Monterey State Historic Park.