During that time, authorities say she was forced to live in the backyard of her alleged kidnapper, Phillip Garrido.
The property is a complex series of ramshackle sheds and tents, all of which lock from the outside.
There was also a soundproof shack, where Jaycee, and her two daughters Angel and Starlet, fathered by Garrido, were forced to live.
Inside the structures, authorities say there were absolutely deplorable conditions, with trash, and filthy, crude furniture lining the walls.
Detectives also say there is a collection of cat decorations, including figurines lining the dilapidated dressers. Three separate agencies were combing through Garrido's property in Antioch Monday.
Police said they are investigating whether Garrido was involved in the murders of several prostitutes.
Over the weekend, authorities also roped off a next-door neighbor's backyard, where Garrido once lived.
Garrido and his wife, Nancy, have pleaded not guilty to the abduction, rape and imprisonment of Dugard.