In 1824, Garza was awarded two large properties in present-day Bexar County, making him one of the largest landowners in the county. He later bought the San Francisco de la Espada Mission around 1834. Garza moved to another home in the 1840s in the southeast part of the county. It appears he died on May 5, 1851 according to the newspaper The Texas State Gazette.
Because of its thick walls, it took six months to demolish the house. Workers found a large stash of hidden money and a cannonball embedded in a wall, which presumably dates to the Siege of Bexar in 1832—an early battle of the Texas Revolution.