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Directory of Pressure Washing Services. The following cost information is intended to be general information. If you are looking for an exact cost for a pressure washing service, you need to contact a professional in your local area. What is the average cost of a pressure washing a house? The average cost of pressure washing a house ranges from $250 to $450 depending upon your geographic location and the size of your home.
1 Hiring a professional pressure-washer costs about $0.08-$0.35 per square foot (depending on local rates), but can go as high as $0.40-$0.80 a square foot depending on the amount and type of stains, dirt, mold or other problems. Washing the exterior of a 2,100-square-foot home runs around $150-$750 or more. 2  Having an entire home pressure-washed (driveway, walkways, house, roof, deck, porch, patio, etc.), can be $500-$1,400 or more, depending on size, condition and local rates.