Roof Cleaning Cost Calculator
Soft-wash roof cleaning typically prices at $0.40–$0.60 per square foot due to safety, chemical and time. WashCalc accounts for all three.
Total square footage to clean.
Heavier soil takes more time and chemical.
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Quote will never go below this amount.How this price is calculated
A transparent two-signal model so you can defend the number to your customer.
Rate-based price
Area × surface rate × condition multiplier. This is your market-friendly anchor.
Cost-plus price
(Labor + chemical + travel) ÷ (1 − target margin). Protects your profit.
The recommended price
The higher of the two — and never below your minimum charge.
Factors that affect job price
Surface type
Roofs and decks command higher per-sq-ft rates than driveways.
Condition
Heavy mildew, oil stains and algae mean more dwell time and chemical.
Access & travel
Long drives, second stories and tight access raise the real job cost.
FAQ
Soft-wash roof cleaning usually runs $0.40–$0.60 per square foot, or roughly $400–$900 for an average residential roof.