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.
A rigid frame steel garage might cost around $10 to $25 per square foot, while a simpler Quonset hut might cost $7 to $15 per square foot. When purchasing metal garage kits, it's possible to order the kit and assemble it yourself, or have the manufacturer complete the installation.