Pressure Washing Cost Estimate: Rates by Surface & Project Size

How Pressure Washing Is Priced

Contractors use one of two pricing models: per square foot (most common for large flat surfaces) or per hour (for vertical surfaces, soft washing, or complex jobs).

Per square foot rates (2026 national averages):

Hourly rates: $50–$200/hr, with most homeowners paying $130–$160 for a solo operator.

Minimum Service Charges

Almost every contractor has a minimum charge of $100–$150, regardless of how small the job is. This covers drive time, setup, and equipment wear. If your calculated area price falls below this minimum, the minimum applies.

Worked example: You want a 500 sq ft concrete patio cleaned. At $0.25/sq ft, the area price is $125. If the contractor's minimum is $150, you pay $150 — the minimum beats the area calculation.

The calculator uses whichever is greater: the area-based price or the minimum charge.

How the Calculator Works

The calculator takes four inputs:

1. Surface area (sq ft) — the total area to be washed
2. Price per square foot — your local rate for the surface type
3. Minimum service charge — the contractor's floor price
4. Add-ons — any extras (chemical treatments, mold treatment, degreasing, sealing)

It outputs the area-based price, the enforced minimum, and the total with add-ons.

What Drives the Add-On Costs

Standard pressure washing removes surface dirt. Add-ons address specific contaminants:

• Oil and grease treatment on driveways: add $50–$150 for a degreaser application before washing
• Mold and algae treatment: soft-washing with sodium hypochlorite adds $0.10–$0.20/sq ft
• Sealing after washing: concrete sealing adds $0.20–$0.40/sq ft; deck sealing adds $0.50–$1.50/sq ft
• Second-story or roof access: scaffolding or safety equipment may add $75–$200 flat

Getting an Accurate Estimate

Measure the area yourself before calling contractors. Common areas:

• Driveway: measure length × width in feet
• House perimeter: (2 × length + 2 × width) × wall height (subtract windows and doors if significant)
• Deck: length × width

Enter these into the calculator using the rate range for your surface type to get a ballpark before comparing quotes.

When Per-Hour Pricing Makes More Sense

Some jobs don't fit the per-square-foot model:

• Cleaning under eaves or in tight corners
• Removing heavy rust or paint (surface prep work)
• Jobs requiring multiple chemical applications
• Combination jobs spanning several surface types

For these, ask for an hourly estimate and discuss what's included.

Common Mistakes When Estimating

Using the same rate for every surface. Concrete and wood require different pressures and techniques — don't assume a driveway rate applies to a deck.

Forgetting the minimum charge. Small jobs (a 200 sq ft patio, for example) almost always hit the minimum. Budget for it.

Not getting multiple quotes. Pressure washing rates vary significantly by region and by contractor. Use the calculator as a baseline, then compare at least two quotes.

Ignoring timing. Spring and early summer are peak season — contractors are busier and sometimes charge more. Late summer or fall often means faster scheduling and sometimes better rates.