Roof Cleaning Cost: $296–$723 (Average $565) in 2026

How much does it cost to have a roof cleaned?

A professional roof cleaning typically costs $296 to $723, averaging around $565 nationally. HomeAdvisor puts the typical range at $296 to $625 with most homeowners spending about $460, and Thumbtack’s figures land close by — most people pay around $514, with a range of $365 to $723. Fixr’s typical cost runs a bit higher at $612 (range $450-$700), and This Old House reports the highest average, $675, for a 1,500 sq ft home, with a range of $300 to $1,050. Roof size drives most of that spread: Thumbtack prices a roof under 1,000 sq ft at around $400 total, while a 3,000-4,000 sq ft roof runs $500 to $630. On the extremes, Fixr cites $173 for a small 200 sq ft chemical clean up to $1,326 for a 1,500 sq ft soft-wash job — a useful bracket if your roof is unusually small or large, or heavily overgrown with moss.

Soft washing vs. pressure washing: what’s the price difference?

Soft washing costs more than pressure washing, and the reason comes down to equipment and materials rather than labor time. Soft washing applies a low-pressure chemical solution that breaks down algae, moss, and grime without stressing the roofing material, and it runs $0.30 to $0.75 per sq ft — the priciest method on the list (Fixr, This Old House). High-pressure (power) washing uses water pressure alone and costs less, $0.20 to $0.70 per sq ft (Fixr). Material matters here too: asphalt shingles, clay tile, and concrete tile are soft enough that pressure washing can crack or strip granules, so professionals default to soft washing for those roofs, while more rugged metal roofing can typically take a high-pressure clean (Fixr, This Old House). HomeAdvisor’s whole-project numbers reflect the same split — a low-pressure wash on wood or slate averages $600 to $1,100, versus $350 to $700 for a high-pressure wash on metal. Cheaper options exist too: a basic dry blower clean runs just $0.05 to $0.10 per sq ft, and a chemical wash without pressure runs $0.20 to $0.30 (Fixr, This Old House).

How much do moss, algae, roof size, and pitch add to the cost?

Existing moss or algae growth is one of the biggest add-ons to a standard cleaning quote. HomeAdvisor prices moss prevention treatment at $100 to $250, while Fixr and This Old House both cite $150 to $250 for the same service; Fixr separately prices active moss removal at $0.20 to $0.70 per sq ft, on the higher end of its method pricing. Zinc oxide strips, an alternative moss deterrent applied after cleaning, run $0.05 to $0.15 per sq ft (Fixr, This Old House), and This Old House prices stain removal separately at $50 to $100. Tom Silva, general contractor at This Old House, explains why the strips work: “When it rains, the zinc particulates dissolve into the rainwater, run down, and coat your roof. This inhibits any future growth of moss, algae, and lichen.” Roof pitch and story count push the per-square-foot rate up further — This Old House’s figures climb from $0.05 to $0.75 per sq ft on a single-story home, to $0.15 to $0.85 on a two-story home, to $0.25 to $0.95 on a three-story home, since steeper and taller roofs require more safety equipment and slower, more careful work.

How can you lower your roof cleaning cost?

• Choose pressure washing over soft washing when your roof material allows it. Metal roofs can typically take high-pressure cleaning at $0.20 to $0.70 per sq ft, well below soft washing’s $0.30 to $0.75 (Fixr, This Old House) — but don’t downgrade the method on asphalt, clay, or tile, since pressure can damage those surfaces.
• Clean before moss or algae takes hold. A routine clean avoids the extra $100 to $250 moss/algae treatment charge (HomeAdvisor, Fixr, This Old House) and the $0.20 to $0.70 per sq ft active-removal rate (Fixr).
• Ask about zinc oxide strips after cleaning. At $0.05 to $0.15 per sq ft, they’re a low-cost way to slow moss and algae regrowth and delay your next full cleaning (Fixr, This Old House).
• Get multiple local quotes, especially on steep or multi-story roofs. Per-sq-ft pricing on a three-story home ($0.25-$0.95) can run nearly triple a single-story rate ($0.05-$0.75), so contractor-to-contractor variation matters more as height and pitch increase (This Old House).
• Bundle roof cleaning with gutter cleaning or exterior pressure washing if you’re already having a crew on-site — one visit is typically more efficient than separate service calls.

Prices vary by region, roof size, material, and how much moss or algae has built up, so treat the figures above as a planning budget. Get two or three local quotes, and confirm which cleaning method the contractor plans to use, before committing to a final number.