Soft-wash siding rate: $0.35/sq ft. Typical 2-story home: 1,500-2,000 sq ft of wall.
Approximate wall area from the home footprint and number of stories. This is a rough estimate, not a measurement.
Total Area
1,600 sq ft
Total Price
$560.00
Surfaces
1
Blended Rate
$0.35/sq ft
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House washing is priced by the square foot. The industry-standard rate for a house exterior soft wash is $0.35 per square foot of wall area. Multiply your siding square footage by that rate to get the base price, then add any extra surfaces the customer wants cleaned in the same visit.
A home with roughly 1,600 sq ft of exterior wall soft-washes for about $560, and a larger 2,000 sq ft home runs about $700. Small jobs are held to a $100-$150 job minimum to cover drive time and setup, so a single small surface never bills below that floor.
Each surface is priced by its own per-sq-ft rate. The example prices below are simply the rate multiplied by a typical area for that surface, so you can see how the line items add up on a bundled job.
| Surface | Rate / sq ft | Example Area |
|---|---|---|
| House exterior (soft wash) | $0.35 | 1,600 sqft |
| Driveway | $0.20 | 600 sqft |
| Patio / pool deck | $0.25 | 300 sqft |
| Deck | $0.40 | 200 sqft |
| Fence | $0.45 | 300 sqft |
| Roof (soft wash) | $0.50 | 1,500 sqft |
| Sidewalk / walkway | $0.15 | 200 sqft |
Any job that totals under the $100-$150 minimum bills at the minimum instead.
A house exterior soft wash is priced at $0.35 per square foot of wall area. A home with about 1,600 sq ft of exterior wall runs roughly $560, and one with 2,000 sq ft runs about $700. Small jobs are held to a $100-$150 job minimum to cover drive time and setup. Adding surfaces like the driveway, patio, deck, fence, or roof raises the total based on each surface's own per-sq-ft rate.
House exterior soft washing costs $0.35 per square foot of wall area. That is the rate for the siding itself; other surfaces are priced separately at their own rates. To estimate a job, multiply the wall square footage by $0.35, then add any selected surfaces.
Soft washing uses low pressure combined with a diluted sodium hypochlorite solution (about 0.5-1% for house siding) to kill mold, mildew, and algae at the root. It is the safe method for siding because it avoids the high pressure that can force water behind panels or damage the surface. The low-pressure approach cleans and treats without blasting the material.
Common same-visit add-ons and their per-sq-ft rates are: driveway at $0.20, patio or pool deck at $0.25, deck at $0.40, fence at $0.45, and a roof soft wash at $0.50. Sidewalks and walkways run $0.15 per square foot. Each add-on is priced by its own square footage times its rate, then added to the house exterior subtotal.
Yes. The standard job minimum is $100-$150 (about $125 at the midpoint) to cover drive time and setup. If the calculated square-footage total comes in under that minimum, the job bills at the minimum instead. This keeps small single-surface jobs profitable.
If you cannot measure directly, approximate it from the home footprint and number of stories. Take roughly four times the square root of the footprint area to get the perimeter, then multiply by about 9 feet of wall height per story. For example, a 1,200 sq ft footprint on two stories approximates to about 2,500 sq ft of wall. This is a rough estimate, not a measurement, so verify before quoting.
A roof soft wash is priced at $0.50 per square foot, the highest add-on rate because it uses low pressure only and requires the most care. A 1,500 sq ft roof adds about $750 to a house wash job. It is billed by roof square footage times the $0.50 rate, on top of the house exterior and any other surfaces.
Soft washing uses low pressure combined with a diluted sodium hypochlorite solution — about 0.5-1% for house siding — to kill mold, mildew, and algae at the root rather than simply rinsing the surface. It is the industry-recommended method for siding because it cleans and treats without the high pressure that can force water behind panels or damage the material.
A surfactant is added so the mix clings and dwells on vertical siding, followed by a low-pressure rinse. If you want to dial in exact mix ratios by surface and contamination level, use our soft wash mix calculator to get the right sodium hypochlorite strength without the math.
This calculator helps contractors produce accurate house wash estimates in seconds. Enter the exterior wall square footage — or use the quick estimate to approximate it from the footprint and number of stories — then toggle on any add-on surfaces and enter their areas. The breakdown shows each surface as a line item so you can quote confidently on the phone or on site.
House washing pairs naturally with other exterior work. Add the driveway, patio, deck, or fence to raise the ticket, or price a full soft-wash package with our pressure washing price estimator and roof cleaning calculator. For a deeper look at pricing method, see how to price pressure washing jobs.
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