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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 According to Homewyse.com, the averages price of power washing house costs $0.69 â $1.18 per square foot. 2  DIYorNot.com states that the average power washing job is going to be $377 for a 1,200 square foot home.3  To get an exact quote for your area, consider using free quote search engines such as HomeAdvisor.com. So for a home that is 1,500 square feet, plan on budgeting anywhere from $150 to $750. 2  According to Homewyse.com, the averages price of power washing house costs $0.69 â $1.18 per square foot.