garage floor coating cost
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.