Power washing a house costs $173 to $358, while pressure washing a deck or driveway ranges from $108 to $262. The average cost for power washing is $0.35 to $0.77 per square foot, and your total price will depend on the size of the job. Get free estimates from pressure washing companies near you.Click to see full answer. Likewise, how much does a pressure washer cost? Pressure Washing Costs & Rates You’ll spend an average of $0.40 per square foot for a professional power washer or anywhere from $25 to $100 per hour depending on the size and type of the job and the equipment needed. However, most pros simply charge a flat rate of $90 to $200 on average.Beside above, how much do pressure washers make an hour? So, $60,000 is roughly $29 an hour. Say you want a cushion of $20,000 for business growth, which equals about $9.50 an hour. You already know that your costs have added up to $40 per hour, so add these together for a total of roughly $80 an hour. Also asked, how much does it cost to pressure wash per square foot? It typically costs between $0.08 and $0.35 per square foot to do pressure washing. This figure depends on the average rates in your region. A pressure washer will charge $0.40 to $0.80 per square foot if there are problems like stains, dirt or mold that take longer to clean, according to CostHelper.How much is a power washer at Home Depot?$50 – $100 – Pressure Washers – Outdoor Power Equipment – The Home Depot.