The Casa de Rancho San Antonio, also known as the Gage Mansion, is the oldest remaining house in Los Angeles County.

In 1880, attorney Henry Gage, a transplant from Saginaw, Michigan, married one of Lugo's great-granddaughters, Francis "Fanny" Rains.

In 1987 Bell Gardens City Councilwoman Letha Viles began working to get the house listed on the state historical registry, making it eligible for maintenance grants.

A 2017 article in Los Angeles Magazine outlined how the homeowners within the Casa Mobile Home Park will not increase their own monthly payments in order for the landmark to undergo the maintenance it so desperately needs.

Homeowners reportedly do not care about the history, nor do they want the site again open to the public due to fear of strangers walking around the property.