Soft washing runs about $0.25 to $0.75 per square foot — roughly $250 to $900 for a typical house. A soft-wash roof clean usually lands between $350 and $1,000. The number moves with square footage, the surface, how much algae is present, and how hard the area is to reach.
We run our own cleaning company in Tucson, so we know the math from the truck side as well as the customer side. Here's what you're actually paying for, and the cases where you should grab a sprayer and do it yourself.
A one-to-two-story home, full exterior. Vinyl and stucco are quicker; painted brick and heavy algae take longer and cost more. Most quotes are per square foot of wall area, not floor area.
The premium job. Steeper pitch, more square footage, and black streaking from algae all push it up. Done right, it kills the algae at the root rather than blasting shingles loose the way high pressure would.
Flat surfaces and fences are priced per square foot. Many companies bundle these with a house wash at a lower combined rate, so ask for the package price.
Storefronts, HOAs, and apartment buildings are bid on site for access, height, and surface. Expect lower per-foot rates at volume but higher totals.
We run a cleaning company and we'll still tell you when to skip the invoice:
Hire a pro for roofs, anything requiring a ladder, and large or delicate surfaces — that's where a wrong mix or too much pressure does real, expensive damage.
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Often a little more per square foot, because of the chemical mix and careful application. But it kills algae at the root, so the surface stays clean far longer — usually 4 to 6 times longer than pressure alone.
Most homes do well on an every-1-to-3-year cycle; humid, shaded, algae-prone properties closer to yearly. Roofs typically hold 3 to 5 years after a proper soft wash.
Single-story siding, yes — for the cost of materials and an afternoon. Roofs and ladder work are where hiring a pro is the safer, cheaper-in-the-long-run choice.
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