Pressure washing can knock months of grime, mold, and algae off your home in a single afternoon—but how long that afternoon actually takes depends on your property size, surface type, and the contractor's approach. Whether you're comparing quotes or planning your weekend project, knowing realistic timelines helps you budget time and money effectively.
Small Residential Jobs (1–3 hours)
A typical single-story house deck, patio, or driveway usually takes 1 to 3 hours start to finish. A standard 500–800 sq ft concrete patio, for example, runs about 1.5 to 2 hours at moderate pressure (2500–3000 PSI). This includes setup, pre-treatment for stains or algae, washing, and cleanup. Contractors often charge $150–$300 for jobs this size, quoted as either hourly rates ($75–$150/hour) or flat fees per square footage ($0.10–$0.20/sq ft).
Medium Residential Work (3–6 hours)
A full house exterior or large two-story property with siding, gutters, and multiple concrete surfaces typically takes 3 to 6 hours. A 2,000–2,500 sq ft home with vinyl or fiber-cement siding, one driveway, and some patio space falls into this range. Soft washing (lower pressure with chemical solutions) takes longer than high-pressure washing because chemicals need dwell time—usually 10–20 minutes—before rinsing. Expect $400–$800 for jobs at this scale.
Large Properties & Commercial (6+ hours)
Multi-story homes, commercial buildings, or extensive grounds (decks, multiple driveways, pool surrounds, parking areas) often require 6 to 10+ hours or multiple visits. A 3,500+ sq ft house with two-story sections, multiple decks, and a long driveway might take 8 hours or be split into two days. Commercial work—like cleaning a shopping center or apartment complex—scales linearly but may cost less per square foot due to volume. Budget $1,200–$2,500+ depending on scope.
Factors That Stretch or Shrink Timeline
Surface type matters significantly. Concrete absorbs water and algae more readily than sealed wood, so it often needs more aggressive scrubbing or chemical pre-treatment. Brick and pavers demand softer pressure (1500–2000 PSI) and more careful technique, adding 20–40% to labor time.
Surface condition directly impacts duration. Heavily stained, mold-covered, or neglected surfaces need soaking time, multiple passes, or eco-friendly chemical treatments that sit for hours. A heavily algae-infested roof might need a 24-hour chlorine dwell before rinsing—meaning two visits or one very long day.
Equipment and crew size also affect speed. Professional crews with truck-mounted systems, hot-water equipment, and surface cleaners (for large flat areas) work 2–3 times faster than homeowners with rental equipment. Two technicians finish jobs roughly 30% quicker than one working alone.
Weather delays are real. Rain halts work, wind spreads debris and spray drift, and extreme heat can cause water to evaporate before chemicals activate. Contractors may reschedule or add buffer time to estimates on unreliable-weather days.
What's Included in Quoted Times?
When a contractor quotes you, confirm what's covered:
- Arrival and setup (15–30 minutes): equipment positioning, hose routing, safety tape
- Pre-treatment (10–60 minutes): applying degreaser, mold killer, or rust remover; letting it dwell
- Washing (variable): the actual pressure or soft washing pass
- Rinsing and touch-ups (10–20 minutes): final rinse, spot checks, sealing if offered
- Cleanup and equipment removal (10–20 minutes): coiling hoses, disposing of debris
Most quotes do include these, but ask explicitly—some quote "washing time only" and charge separately for setup or post-treatment.
Soft Washing Takes Noticeably Longer
If you're comparing quotes and one contractor offers soft washing (under 500 PSI with biodegradable soaps), expect 30–50% longer timelines than standard pressure washing. A house that takes 4 hours to pressure wash might take 5.5–6 hours with soft washing. The tradeoff: less risk of damage to siding, wood, and paint, plus longer-lasting mold prevention. Costs typically run $50–$100 more for residential jobs but are worth it for delicate surfaces.
Finding Reliable Contractors Fast
Rather than calling five companies individually and juggling conflicting schedules and estimates, you can compare vetted pressure and soft washing providers in one place on Mercoly—see detailed timelines, reviews, and pricing side by side.
Frequently Asked Questions
Q: Does pressure washing take longer if my house hasn't been cleaned in years? Yes—heavy buildup, stubborn mold, and rust stains require extended dwell times for chemicals or multiple pressure passes, often adding 1–3 hours to the job.
Q: Can pressure washing be done in winter or rainy climates? It's possible but slower and riskier; cold water reduces cleaning power, and wet conditions prevent fast drying. Most contractors charge 15–30% more for winter work or will postpone until dry weather.
Q: What's the difference between a $200 and $600 quote for the same job? Crew size, equipment quality (hot water vs. cold, truck-mounted vs. portable), experience level, and insurance all factor in—cheaper isn't always faster or safer.
Ready to compare fair quotes? Browse and book trusted pressure washing providers in your area today.