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The total cost for painting an interior will run about $1.02 per square foot (about $390 for the for a 12x12 room) of wall space being painted. A professional painting contractor will be able paint an average bedroom like we listed above in only half a day.
A good guideline for an average house is to multiply the cost of the paint by 3 and add that to the cost of materials to get the price of a professional paint job. Figure about $2000 to paint your house that has 1600 square feet of paintable surface area.If you get three estimates, they should be near that amount, give or take 10%. Divide the 2000 by 1600 and that will give a total of $1.25 per square foot.rofessional painters will typically charge $1,500-$3,000 to paint an average single-story home. However, if your home is up to 3,500 square feet with multiple levels, you can expect to pay $5,500 or more for exterior painting labor.