 While the first few buildings were constructed in land bought from the city of Pasadena, subsequent buildings were constructed in neighboring unincorporated land that later became part of La Cañada Flintridge.Nowadays, most of the of the U.S. federal government-owned NASA property that makes up the JPL campus is located in La Cañada Flintridge.Despite this, JPL still uses a Pasadena address (4800 Oak Grove Drive, Pasadena, CA 91109) as its official mailing address.