A contractor told you he would charge 12 dollars a square foot for a concrete patio and it is a 12x12 ft how much would this come out to?
$1,728 square footage = length by width = 12 X 12 = 144 sq ft
144 sq ft at $12 per sq ft = 144 X 12 = 1,728.00 dollars
Every General Contractor operates differently. Our business charges an hourly rate of $35/hr. However, for a home build we let the home owner negotiate what is best for them. We may charge a percentage on top of materials for labour or we charge a rate per square foot, or keep the hourly rate...typically whatever works out to be cheaper for the customer
Concrete is measured in psi "pounds per square inch". Most driveways and sidewalks are anywhere from 3,000-3,500 psi. A state job would be 4,000 to 5,000 psi as they have different standards than your average contractor. Concrete itself can range anywhere from 2,500 to 10,000 psi according to what it's being used for.