The main value, of course, is that you will have more room and space in your house. Many people love their home and their neighborhood and have the comfort of family nearby, but they've simply outgrown their house.
Another factor is if they have an elderly parent and don't want to move them into a living care facility.
Still, others, are interested in having a possible live-in rental space, with a separate bathroom and kitchenette, which in today's Sacramento sky-high rentals, can rent out for $1,000 a month or more.
Finally, many people have learned the hard way, that the price of a home in Sacramento has gone up around 21 yearly, and they simply can't see the value of spending $500,00 when they can simply add on and save thousands of dollars.