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It really depends on the size of the house, paint quality, and labor costs, but a common estimate is $2–$6 per square foot for interior painting and $3–$8 per square foot for exterior painting when hiring professionals. Many homeowners ask how much does it cost to paint a house because prices can change based on preparation work, repairs, and local labor rates. DIY is cheaper, but you still need to budget for paint, tools, and prep materials. The biggest cost factors are surface preparation, number of coats, and paint quality, while hidden expenses can include wall patching, primer, trim work, and moving furniture. Getting several quotes and confirming what’s included usually helps avoid surprises.