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.
Although the total cost may vary greatly, building a garage detached from the house generally costs at least $45 per square foot ($480 per square metre). For example, a single garage 12 feet wide by 24 feet long (3.7 m x 7.3 m) costs approximately $12,600. In the case of a double garage 18 ft. by 24 ft. (5.5 m x 7.3 m), the cost is about $19,500. Keep in mind that these prices are approximate and include labour costs.