Cost Estimators · Outdoor
Power Washing Cost Per Sq Ft Calculator
Enter your surface area and instantly estimate power washing cost — driveways, decks, siding, and patios.
Power washing is one of the most cost-effective ways to restore the appearance of exterior surfaces — often making a driveway, deck, or home exterior look years newer in a single visit. Costs vary by surface type, access, and level of soiling. Use this calculator to budget your next exterior cleaning project.
Enter an area above to see your estimate
Using national average: $0.1–$0.5/sq ft
Estimates are based on national averages and are for planning purposes only. Actual costs vary by location, contractor, and material choice.
Example: 1,000 sq ft driveway and patio
Area
1,000
sq ft
Low Estimate
$100
@ $0.1/sq ft
High Estimate
$500
@ $0.5/sq ft
Based on national average rates of $0.1–$0.5/sq ft. Actual costs will vary by location and contractor.
How much does power washing cost per square foot?
Power washing costs $0.10–$0.50 per sq ft depending on surface type and condition. Driveways and flat concrete cost $0.10–$0.25/sq ft. Wood decks and fences cost $0.20–$0.40/sq ft. House siding (vinyl, brick, stucco) runs $0.15–$0.35/sq ft. Soft washing (low-pressure chemical cleaning for roofs and delicate surfaces) costs $0.20–$0.60/sq ft. Most contractors have a minimum charge of $100–$200 regardless of area. Annual power washing of driveways and siding is the best low-cost exterior maintenance you can do.
Cost by project size
| Project size | Low estimate | High estimate |
|---|---|---|
| 500 sq ft (driveway) | $50 | $125 |
| 1,000 sq ft (driveway + patio) | $100 | $250 |
| 1,500 sq ft (house siding) | $225 | $525 |
| 2,000 sq ft (large home exterior) | $300 | $700 |
| 3,000 sq ft (whole property) | $450 | $1,050 |
Approximate 2026 US national averages at $0.1–$0.5/sq ft installed. Actual costs vary by location, contractor, and project complexity.
What affects outdoor cost per square foot?
Surface type
Flat concrete surfaces (driveways, patios, walkways) are fastest to clean at $0.10–$0.25/sq ft. Wood decks require lower pressure and more care at $0.20–$0.40/sq ft. Brick and stucco siding runs $0.15–$0.35/sq ft. Roofs require soft washing (low-pressure chemical treatment) at $0.20–$0.60/sq ft.
Level of soiling
Light surface dirt cleans quickly. Heavy oil stains on driveways, black mould on siding, or heavily weathered wood decking requires pre-treatment with degreasers or detergents — adding time and cost. Contractors typically add a soiling surcharge for heavily stained surfaces.
Building height & access
Single-storey surfaces are straightforward. Two-storey siding requires extension wands or scaffolding — adding $0.05–$0.15/sq ft. Hard-to-reach areas (soffits, eaves, narrow side passages) take longer and are priced higher per sq ft.
Detergent & chemical treatment
Plain water pressure washing removes loose dirt. Surface-appropriate detergents are needed for mould, mildew, algae, and oil stains. Roof soft washing uses sodium hypochlorite solution to kill moss and algae without high pressure that damages shingles. Chemical treatments add $0.05–$0.15/sq ft.
Frequency & bundling
Contractors offer discounts for cleaning multiple surfaces in one visit — booking driveway, patio, and siding together typically saves 15–25% vs separate visits. Annual cleaning contracts are also available from some companies at lower per-visit rates.
Location & minimum charges
Most power washing contractors have a $100–$200 minimum charge regardless of area. Small jobs under 500 sq ft rarely pencil out well — consider booking alongside other surfaces. Urban markets run 20–40% above national average rates.
Frequently asked questions
How much does power washing cost per square foot?
Power washing costs $0.10–$0.25/sq ft for driveways and flat concrete. House siding runs $0.15–$0.35/sq ft. Wood decks cost $0.20–$0.40/sq ft. Roof soft washing is $0.20–$0.60/sq ft. For a 1,000 sq ft driveway and patio, expect $100–$250. Most contractors have a $100–$200 minimum charge.
How often should you power wash your house?
Most homes benefit from power washing every 1–2 years. Homes in humid climates, near trees, or with north-facing shaded siding may need annual washing to control mould and algae growth. Driveways in high-traffic areas benefit from annual cleaning. Decks should be washed and sealed every 2–3 years.
Can power washing damage surfaces?
Yes — improper pressure or technique can damage wood, soft brick, stucco, and window seals. Wood decks require lower pressure (500–1,200 PSI) than concrete (2,000–3,000 PSI). Roofs should never be pressure washed — soft washing (low-pressure chemical treatment) is the correct method. Always hire contractors experienced with the specific surface type.
Should I power wash before painting?
Yes — power washing before exterior painting is essential. It removes dirt, chalk, mould, and loose paint that would otherwise prevent proper adhesion. Allow 24–48 hours drying time after washing before applying primer or paint. Skipping this step is one of the most common causes of premature exterior paint failure.
Is it worth hiring a professional vs renting a pressure washer?
Renting a pressure washer costs $60–$100/day plus detergents, vs $150–$500 for professional service on a typical home. The DIY option is cost-effective for simple concrete surfaces. For two-storey siding, roofs, or delicate surfaces, professional service is worth the cost — improper technique can easily cause more damage than the cleaning saves.