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.
1 The website Homewyse.com states that the national average cost to paint a garage floor runs between $1.61 and $2.42 per square foot. 2  The said site also gives some quotes based on the clientsâ location and garage floor size. With the said price list, you can simply calculate all the overall floor size of your garage and add up all the expenses. 2  The website Homewyse.com states that the national average cost to paint a garage floor runs between $1.61 and $2.42 per square foot.