How to start a pressure washing business

This guide takes a pressure washing company from the first rig to a registered, insured business with paying customers, starting with the rule most new owners never hear about: where the dirty water goes. Under the Clean Water Act and the city ordinances it requires, wash water may not run into a storm drain, and Ohio's EPA says that holds even when the soap is biodegradable.

By Niomi AscotUpdated October 3, 202616 min read

Wash water: Never to the storm drain: sanitary sewer with the utility's permission, collect and haul, or a permit per site
Local fines: Up to $1,000 per violation per day and six months in jail in Brookhaven, Georgia
Licensing: No state pressure washing license found; California's D-38 covers surface prep at $1,000 or with any employee
Older homes: On pre-1978 homes, washing that disturbs paint falls under EPA's lead rule, wash water included
Roofs: Asphalt shingle makers say high pressure should not be used for algae
Google ads: No Local Services Ads category for pressure washing; Window cleaning is the nearest

Where the wash water goes, before anything else

Every job ends with a puddle of dirty water, and the law about that puddle starts with the Clean Water Act: “the discharge of any pollutant by any person shall be unlawful” except as the Act allows (33 U.S.C. 1311). Federal rules then define an “Illicit discharge” as “any discharge to a municipal separate storm sewer that is not composed entirely of storm water,” with narrow exceptions such as firefighting (40 CFR 122.26), and require permitted cities and counties to “effectively prohibit, through ordinance, or other regulatory mechanism, non-storm water discharges into the storm sewer system” (40 CFR 122.34).

That second rule is why the restriction you meet on a driveway is a local ordinance, and why it reads almost the same from Georgia to Oregon.

Ohio spells out the options. Ohio EPA’s June 2025 fact sheet says “Wastewater generated by power washing is considered industrial wastewater,” and “Even if you are using biodegradable soaps or detergents, your wastewater is still defined as an industrial wastewater.” Its conclusion is in capitals: “You CANNOT discharge your power washing wastewater into a storm sewer.” It lists three lawful paths (Ohio EPA):

“Obtain permission to discharge the wastewater to a POTW through a sanitary sewer at the job site,” a POTW being the public sewage treatment plant.
“Collect the wastewater from the job site and arrange for disposal at a POTW or industrial waste disposal facility.”
Get an NPDES discharge permit, where “A permit would be required for each job site with a direct discharge” and “The permitting process can take several months.”

It also closes two loopholes: “It is NOT acceptable to let wastewater run outside and collect in areas such as parking lots, driveways or catch basins to evaporate,” and “Drains and gutters found outside buildings, in parking lots or along streets are usually NOT sanitary sewers.”

Why the permit route rarely works for a mobile washer. Maryland’s WSSC Water puts it plainly: an operator “must obtain a NPDES permit for each discharge location,” and because most are mobile, “it is not realistic to pre-determine discharge locations and obtain permits for each location” (WSSC Water). WSSC also notes that hauling wastewater on public roads “may require further permitting by other agencies.” In practice, then, a new company chooses between the sanitary sewer with the utility’s written permission and a vacuum recovery system with a holding tank.

What the cities say.

Brookhaven, Georgia cites 40 CFR 122.26 and sets maximum penalties for sending wash water to storm drains or waterways at “$1,000 fine per violation per day and up to six months in jail.” Where water cannot go to grass or soil, “it must be collected for disposal using methods such as wet/dry vacuum,” and “Vacuuming washwater may be required when pressure washing a roof.” It advises washing with water alone where possible and avoiding products with “hazardous or toxic substances, such as bleach” (Brookhaven).
Sacramento County lists pressure washing discharges to the storm drain among its common violations: “All wastewater must be contained, collected and properly disposed of” (Sacramento County).
Eugene, Oregon warns that “biodegradable or ‘nontoxic’ cleaners can pose a threat” and names “Grease from food dumpster areas” among commercial pollutants (City of Eugene).

Before your first commercial job, call the local sewer utility and the city stormwater office, ask which disposal route they accept, and get the answer in writing. Fines here are as of October 2026; your own city’s ordinance sets the numbers that apply to you.

What a pressure washing company sells

WSSC’s list of surfaces is a fair picture of the market: “sidewalks & plazas, driveways, parking garages, building exteriors, graffiti removal,” “trash dumpsters,” “grease traps outside of buildings,” fleets and “residential homes, decks.” New companies tend to start in one of these lanes:

Residential exterior cleaning. House washes, which in our experience are mostly soft washing with low pressure and a cleaning solution, plus driveways, patios, decks, fences and roofs. Thumbtack says residential pros “usually charge a fixed price for flatwork.”
Commercial schedules. Storefronts, drive-throughs, dumpster pads, parking areas, gas stations and fleets, typically priced “per square foot” (Thumbtack, power washing prices). Food-service sites bring grease, which makes the disposal question harder.
Paint preparation. Washing ahead of painters, which is where California’s contractor license and the EPA lead rule come in.

Most owners begin solo with one rig on a trailer or truck skid.

The size of the field and what the work pays

The Census Bureau files pressure washing under NAICS 561790, Other Services to Buildings and Dwellings, whose index includes “Power washing building exteriors” and “Pressure washing (e.g., buildings, decks, fences)” next to pool cleaning (NAICS 561790). For that whole category, County Business Patterns 2023 counts 18,069 employer establishments with 90,169 employees, 73.6 percent of them with fewer than 5 employees, and Nonemployer Statistics 2023 counts 142,112 businesses with no employees. Neither is a pressure washing count. IBISWorld, a private market research firm that does not publish its method on the free page, sizes US pressure washing services at “$1.2bn” across “32,193 businesses” (IBISWorld). Either way, a new company enters a crowded field of very small firms.

There is no Bureau of Labor Statistics occupation for pressure washers. The nearest on O*NET is Cleaners of Vehicles and Equipment, mostly car washers and detailers, with a 2025 median wage of $17.23 an hour, 410,100 people employed in 2024 and growth to 2034 rated “Average (3% to 4%)” (O*NET OnLine, 53-7061.00). Use the wage as a rough floor for entry pay.

Demand follows the weather. Thumbtack’s consumer guide favors mild spring and fall days over hot summer sun, and in the North freezing weather ends most outdoor work for the winter.

Lead paint, roofs and the other federal rules

Pre-1978 homes and the EPA lead rule. EPA says “Pressure washing is not a prohibited practice under the Lead Renovation, Repair, and Painting (RRP) Rule,” but it is “subject to the same containment requirements as other permissible work practices,” and the firm “must isolate the work area so that no dust or debris (including in the waste water) leaves the work area” (EPA, RRP and pressure washing). The rule covers paid work that disturbs paint in pre-1978 housing, which “includes all firms, even sole proprietorships”; it exempts disturbing “20 square feet or less on the exterior”; and “Firms cannot advertise or perform renovation activities covered by the RRP Rule” without firm certification (EPA, RRP for contractors). A gentle house wash that removes no paint is not obviously a renovation. Prep washing that strips loose paint off a 1960s house is, so get the firm certification before you offer it, and ask EPA or your state program when a job sits in between.

Roofs. The Asphalt Roofing Manufacturers Association’s bulletin on roof algae says stains “may be lightened by applying a solution of chlorine bleach, trisodium phosphate, and water,” warns “Avoid scrubbing the surface, as this friction may loosen and remove granules,” and is direct about equipment: “High pressure washing systems for algae removal should not be used” (ARMA technical bulletin). It also notes that the treated roof becomes “slippery and potentially hazardous to walk on.” Shingle roofs are soft-wash work. The catch is that the bleach solution ARMA describes is exactly what Brookhaven asks washers to keep away from storm drains, and Brookhaven tells crews to “Block or divert roof gutters to pervious areas.” Plan the runoff before you mix the chemicals.

Trailers across state lines. A vehicle used in interstate commerce becomes a commercial motor vehicle at a “gross vehicle weight rating or gross combination weight rating” of 10,001 pounds or more (49 CFR 390.5). A pickup towing a full water tank can pass that combined rating, which matters if you take jobs over a state line.

Licenses: mostly local, with two exceptions

We found no state license written for pressure washing in any state we checked, though no state page said outright that none exists. What you need is business registration, any city or county business license or tax, and the sewer utility’s permission for disposal. The SBA notes most small businesses need “a combination of licenses and permits from both federal and state agencies.” Florida, for example, lets cities levy “a business tax for the privilege of engaging in or managing any business, profession, or occupation within its jurisdiction” (Fla. Stat. 205.042).

State or county	Agency	License	Key requirements, as the agency states them
California	Contractors State License Board (D-38)	C-61/D-38 Sand and Water Blasting	Covers washing that prepares surfaces “for any protective, decorative and/or functional treatment”; required at $1,000 or more, when a permit is needed, or when anyone is employed; four years of journey-level experience
Florida (Miami-Dade County)	Miami-Dade building specialty licenses (county page)	Painting and Waterproofing Contractor certificate	Needed for “rooftop painting, coating, and cleaning above three stories in height”; three years of experience. No Florida state license for ordinary washing found
Texas	Comptroller of Public Accounts (Publication 94-111)	No state license found; sales tax permit	Pressure washing is a taxable service; permit holders collect and remit tax
Ohio	Ohio EPA (fact sheet)	No license found; sewer permission or NPDES permit for discharge	Wash water is industrial wastewater; never to a storm sewer; permits are per job site and take months

Requirements are as of October 2026. Confirm each with the agency and with your city and county before you take a job.

California’s D-38. CSLB groups D-38 among the “D” subcategories of the C-61 Limited Specialty license (CSLB, C-61) and defines the work as using “the force of compressed air in conjunction with abrasive materials or water to clean or prepare surfaces for any protective, decorative and/or functional treatment.” Since January 1, 2025, unlicensed minor work is allowed up to $1,000, “but there is a catch: the work cannot require a permit, and the unlicensed person cannot employ anyone for the project,” and ads for that work must say the person is not licensed (CSLB Industry Bulletin 24-07). A license takes four years of journey-level experience (CSLB, experience). We could not confirm whether CSLB treats a plain house wash or driveway clean, with no coating to follow, as D-38 work. The safe reading is that washing ahead of paint or sealer is D-38 work, and that bringing on a single helper ends the $1,000 exemption at any job size. Ask CSLB about your own mix of jobs.

California’s engine rule. The Air Resources Board’s small off-road engine rules include “Pressure washers,” and “By model year 2028, emission standards for smog-forming emissions from new engines are set at zero,” though the rules “do not affect equipment already sold and in use, and they do not ban gasoline-fueled equipment” (CARB FAQ). EPA sent the authorization to Congress for Congressional Review Act consideration on June 12, 2026, so check its status before buying a fleet of new engines.

Training. Power Washers of North America (PWNA), the trade’s association, says it “sets the national standard for professional education, safety awareness, and certification training” (PWNA). Its environmental course covers “Clean Water Act requirements and EPA regulations that govern wastewater discharge and water reclamation practices” and how to “document their environmental practices for commercial clients, municipalities, and inspectors,” and it runs house wash, roof cleaning, flatwork and fleet washing certificates (PWNA environmental training). No state we found requires it.

Setting up the company

Entity and tax ID. A wash company carrying chemicals onto other people’s property usually forms an LLC, which the SBA says shields personal assets “in most instances.” EINs cost nothing, and the IRS asks you to form the LLC before applying.

Sales tax, with Texas as the example. The Comptroller treats both kinds of washing as taxable: “Pressure washing is taxable as the restoration or maintenance of tangible personal property,” and “Pressure washing buildings, sidewalks, and parking lots is taxable as building or grounds cleaning” (Publication 94-111). The underlying rule names “cleaning or washing sidewalks, parking garages, or parking lots” and requires providers to “obtain a tax permit and collect and remit sales or use taxes” (34 TAC 3.356). So a Texas driveway wash and a fleet wash both carry tax. Other states differ; ask your revenue department.

Insurance. General liability “protects against financial loss as the result of bodily injury, property damage” and more (SBA, business insurance). In this trade the claims we hear about are property damage: etched glass, stripped paint, gouged siding and wood, and plants killed by runoff. Commercial auto for the rig and pollution coverage are what property managers tend to ask for next.

Workers’ compensation:

Texas does not require it of most private employers (TDI).
California requires it of every employer except the state itself (Labor Code 3700), so the first hire means a policy.
Florida requires it at four employees outside construction and at one inside it (Fla. Stat. 440.02). Whether pressure washing counts as construction was not confirmed; ask the state.

The rig, the recovery kit and the software

The rig is the biggest first purchase, and this is the kit new wash companies tend to buy around it in our experience, rather than a sourced list:

Pressure washer. Gas or diesel, with a hot-water unit once you take on grease and oil.
Water and hoses. A tank on a trailer or truck skid, hose reels, surface cleaners for flatwork and extension wands.
Soft-wash system. A low-pressure pump and chemical tank for houses and roofs.
Water recovery. Berms, drain covers, a vacuum recovery unit and a holding tank, which the Ohio, Brookhaven and Sacramento rules all but require wherever water cannot soak into landscaping.
Chemicals. Sodium hypochlorite, surfactants, degreasers and rust removers, with safety data sheets in the truck.
Safety gear. Eye and face protection, chemical gloves, non-slip boots, ladders and fall protection for upper stories and roofs.
Truck. One rated for the loaded trailer and a full water tank.
Software. Quoting from satellite views and photos, scheduling, before-and-after photo records and recurring billing for commercial accounts.

Pricing jobs and the hidden costs

You will find no startup total for a wash company here, because no published estimate explains how it was reached. The SBA’s startup cost page lists the categories to budget; for a wash company the rig, the recovery kit and insurance lead.

Residential flatwork is usually a fixed price and commercial work per square foot, and house washes are commonly quoted by size and stories, roofs by area and pitch. Thumbtack’s own data puts a house wash at “$241-$418,” a driveway at “$241-$439,” a roof at “$419-$686” and a patio at “$252-$447.” Thumbtack does not publish its method, so read these as the ranges homeowners see when they compare, not as your price list.

Two costs get left out of first quotes: disposal, whether hauling or sewer fees, and the re-wash or repair after a damage claim. Build both in. Thumbtack points bargain hunters to winter and early spring; in our experience that slow stretch is when to sell commercial contracts and annual house-wash reminders.

Hiring crews and keeping them safe

Pay. The nearest benchmark is the $17.23 median above, and on O*NET 54 percent of respondents in that occupation said a high school diploma is required and 24 percent said less.

Falls. OSHA sets the fall protection trigger at four feet in general industry workplaces and six feet in construction (OSHA, fall protection). The general industry rule protects a worker on a surface “with an unprotected side or edge that is 4 feet (1.2 m) or more above a lower level” (29 CFR 1910.28). On OSHA’s fiscal year 2025 most-cited list, construction fall protection was first and construction ladders third (OSHA top 10). A roof wet with cleaning solution is the worst version of that hazard.

Chemicals. OSHA requires “a written hazard communication program” and safety data sheets “readily accessible during each work shift” (29 CFR 1910.1200); hazard communication was second on the same list, and construction eye and face protection ninth.

The machine itself. Injection injuries from a high-pressure stream, burns from hot-water units and carbon monoxide from engines run in parking garages are the hazards we see trained into crews first.

Drains. Teach every hire which drains are storm drains before the first job. Ohio EPA’s rule of thumb works anywhere: drains outside buildings, in parking lots and along streets “are usually NOT sanitary sewers.”

Finding the first customers

No Local Services Ads category. Google’s Local Services Ads list no pressure washing category. The nearest is Window cleaning, whose pros “clean windows, mirrors, skylights, and gutters, among other services,” with background checks for select users and general and professional liability insurance required (Google Local Services requirements). For a new wash company, Google means the Business Profile and ordinary Search ads.

Google Business Profile. If you wash at customers’ properties, hide your address; you can name up to 20 service areas within about two hours’ drive of your base (Google, service areas). A rented virtual office “isn’t eligible for a Business Profile,” and “Including unnecessary information in your business name isn’t permitted,” so skip the keyword-stuffed name (Google Business Profile guidelines).

Reviews with pictures. BrightLocal’s 2026 survey found 47 percent of consumers won’t use a business with fewer than 20 reviews, and 36 percent count an “appealing photograph or video” with a review as a trust factor (BrightLocal). Before-and-after photos are this trade’s natural proof, so ask customers to post one. Do not reward only good reviews: the FTC’s 2024 rule bans incentives “conditioned on the writing of consumer reviews expressing a particular sentiment.”

The street you are already on. A yard sign during the job and a same-day rate for neighbors while the rig is parked outside fill a day without extra driving.

Commercial accounts. Restaurants with dumpster pads and drive-throughs, retail centers, property managers and HOAs buy on schedules. A one-page wash-water plan, naming the disposal route your sewer utility approved, plus PWNA’s environmental course, answers the first question their facilities staff ask. Painters, real estate agents with pre-listing homes, window and gutter companies and roofers who do not soft wash are the partners we see refer work early.

Our page on marketing for pressure washing companies covers the channels, the photo-led approach and the season in depth. Set up your Google Business Profile first, build a steady stream of reviews, and add Google Search ads once you know your margins.

What trips up new pressure washing companies

Rinsing into the gutter. Brookhaven’s maximum is $1,000 a day per violation, and “biodegradable” is no defense in Ohio.
Too much pressure. Shingle makers say no high pressure for algae; siding, wood and paint fail the same way.
Prep washing an old house without lead certification. The EPA rule follows the wash water off a pre-1978 home.
Hiring in California before licensing. One employee ends the $1,000 exemption.
Waiting for a Local Services category that does not exist.
A northern winter with no contracts to carry the truck payment.

Questions people ask before starting a pressure washing business

Do you need a license to start a pressure washing business?

No state license specific to pressure washing was found, but you need business registration and any local business tax. California requires a CSLB D-38 license for washing that prepares surfaces for coating on jobs of $1,000 or more or once you employ anyone, and Miami-Dade requires a certificate for rooftop cleaning above three stories.

Where does pressure washing wastewater have to go?

Anywhere but the storm drain. The lawful routes are the sanitary sewer with the utility’s permission, collecting and hauling it to a treatment plant, or a site-specific discharge permit; some cities also allow clean water to soak into landscaping.

Is biodegradable soap enough to make runoff legal?

No. Ohio EPA says wash water with biodegradable soaps “is still defined as an industrial wastewater,” and Eugene warns that biodegradable cleaners can still harm waterways.

Can I pressure wash an asphalt shingle roof?

Not with high pressure, according to the shingle makers’ association, which says high pressure washing “should not be used” for algae. The method ARMA describes is a cleaning solution with a gentle rinse and no scrubbing.

Does the EPA lead rule apply to pressure washing?

It does on pre-1978 homes when the washing disturbs paint beyond 20 square feet outside. Containment must keep debris, including wash water, inside the work area, and the firm needs EPA certification to advertise or do that work.

Can a pressure washing company use Google Local Services Ads?

Not under its own name: Google lists no pressure washing category, and Window cleaning is the nearest. The Business Profile and Search ads are the Google options for a new company.

Do pressure washing companies charge sales tax?

In Texas they do, on washing buildings, sidewalks and parking lots and on washing things like vehicles. Other states set their own rules.

Sources

Checked on October 3, 2026. Rules and fees change, and many are set state by state or city by city: confirm the current requirements with the agency that issues them before you apply.

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