Both numbers are well below what Brown said. Heâd said that the elderly account for two-thirds of the cost, when in fact theyâre just over 20 percent, and that children account for one-third, when theyâre actually less than 20 percent.
A 20-by-20-foot garage totalling 400 square feet would cost between $16,000 and $24,000 without an apartment, and anywhere from $20,000 to $35,000 with an apartment.Homeowners who are skilled at construction and can do some or all of the work themselves can cut an enormous amount off of those numbers. 20-by-20-foot garage totalling 400 square feet would cost between $16,000 and $24,000 without an apartment, and anywhere from $20,000 to $35,000 with an apartment.
Garage Remodeling Costs. The price of a garage remodel depends on whatâs being done. Obviously, turning the garage into a basic living room or office is more affordable than turning it into an in-law suite with a kitchenette and bathroom. That being said, the average cost is about $10,000 to $15,000. 1  A garage remodel intended simply to improve the garage (and still use it as a garage) can usually be done for about $1,000 to $5,000. 2  A basic conversion to an office or bedroom usually costs about $5,000 to $10,000.