How Much Does Power Washing Cost In Your Area?

A typical single-story house wash takes 2 to 4 hours, including setup, soft wash detergent application, dwell time, and rinse. Driveways and patios run 1 to 3 hours each. A two-story home or full property package with house, driveway, and deck typically wraps up in 4 to 8 hours, often as a single visit. Most pros work in any weather above 40F and avoid days with heavy rain or freezing temperatures.

Power washing uses high pressure, often 2,000 to 4,000 PSI, which is right for concrete, brick, and unpainted hardscapes. Soft washing uses low pressure, around 100 to 500 PSI, with biodegradable detergents that kill algae, mold, and mildew without damaging surfaces. Soft wash is the right call for vinyl siding, painted wood, asphalt shingles, stucco, and any roof. Power washing the wrong surface is the number one cause of damage claims in the industry.

Most homes need a full exterior wash every 1 to 2 years. Homes in humid climates like the Southeast often need annual washing because of black mold and algae. Driveways and patios benefit from cleaning every 1 to 3 years. Roof soft wash every 2 to 4 years prevents black algae streaks. Annual maintenance contracts often run 10% to 15% less than one-off jobs and bundle multiple services.

Yes, if the wrong technique is used. High pressure can blast holes in vinyl siding, force water behind the siding causing mold inside walls, strip paint, gouge wood, damage roof shingles, and break window seals. Reputable contractors test pressure on a small area first and switch to soft wash for any sensitive surface. DIY power washers cause far more damage than pros because of inexperience with pressure settings and angles.

Renting at $80 to $120 per day plus $40 in detergent makes sense for small jobs like a single deck or driveway. For full house washes, the math usually favors hiring a pro at $300 to $900. Pros bring 4 GPM commercial gear that cleans 3 to 5 times faster than rental units, ladders for two-story work, and insurance for any damage. DIY also creates the surface damage risk above, especially on siding and roofs.

Roof soft washing applies a low-pressure mix of biodegradable detergent and sodium hypochlorite to kill the black algae (Gloeocapsa magma) that causes streaks on asphalt shingles. The treatment costs $500 to $1,200 and lasts 4 to 6 years. It is far cheaper than the $5,500 to $25,000 cost of a premature roof replacement caused by algae feeding on shingle granules. Avoid contractors who use high pressure on roofs since they will void shingle warranties.

Spring and early fall are ideal because temperatures stay between 40F and 80F, which is the safe range for detergents and surfaces. Summer washing works but heat causes detergents to evaporate before they can dwell. Winter washing requires temperatures above 40F and dry weather. Peak booking season is March through May ahead of summer entertaining and pre-listing prep, so book 2 to 4 weeks ahead during that window.