Pressure Washing Estimate Calculator

Each surface row multiplies its measured quantity by a rate, then by a soiling factor and (for height-affected surfaces with two-story on) a height factor. Gutters are measured and priced per linear foot. The job minimum is a floor: the quote never drops below it.

per-sq-ft method:
  factor    = soiling × (two-story & height-affected ? 1.30 : 1.00)
  linePrice = area × rate × factor      (gutters: lin_ft × $/lin ft × factor)
  subtotal  = Σ linePrice
  quote     = max(subtotal + materials, jobMinimum)

production-rate method:
  lineHours = (area ÷ prodRate) × factor
  quote     = max(Σ lineHours × targetHourlyRate + materials, jobMinimum)

always shown:
  laborHours     = Σ lineHours
  effective $/hr = quote ÷ laborHours
  range          = quote ± 10%, each rounded to the nearest $5

soiling: Light 1.00 / Average 1.15 / Heavy 1.35
two-story height factor: 1.30 (siding / roof / gutters only)

Worked example. A 2,000 sq ft concrete driveway at 500 sq ft/hr and $90/hr is 4.0 hours, so $360 — and at $0.18/sq ft the per-sq-ft method lands on the same $360, an effective $90/hr. The two methods reconcile, which is the cross-check this tool surfaces.

Per-surface rates and the 500 sq ft/hr production rate are editable starting points, not fixed rules — a surface cleaner runs far faster than a wand. Adjust them to your market, surfaces, and equipment. Tax is excluded.

Two of the surfaces on this list are really their own trades when sold on their own. Gutters priced by the ladder hour rather than as a line on a wash quote belong in the gutter cleaning pricing calculator, and glass you count rather than measure belongs in the window cleaning pricing calculator.

A driveway quoted on its own, with sealing and oil-stain work in the same visit, is priced in the driveway cleaning price calculator. Roofs and painted siding are washed with chemistry rather than pressure, so the mix that does the work comes from the soft wash mix dilution calculator.