Interior painting starts around $2.00 per square foot for walls only. A typical 12×12 room runs $450 to $1,200 including labor and materials. Whole-house interiors average $3,500 to $10,000 depending on prep. Drywall repair adds $1.00 to $3.00 per square foot for damaged areas. We use premium paints selected for humidity resistance and low-VOC formulation. Our interior work covers walls, ceilings, trim, doors, and cabinet painting.