How to Start a Pressure Washing Business

Pick the services you'll start with

Pressure washing is several businesses that share a pump, and each one goes wrong in its own way. Decide what you'll sell first, because that sets your equipment list, your insurance questions and your water plan.

House washing and flatwork make a practical starting pair: one rig does both, and the homeowner who wants a clean house often wants a clean driveway too. Add roofs and greasy commercial work once the basics run smoothly.

One request deserves a pause: stripping paint. Paint on older homes may contain lead, and removing paint is a different job from cleaning it. EPA's lead renovation rule covers work that disturbs painted surfaces in homes built before 1978; outside, it excludes only minor jobs that disturb 20 square feet or less, and covered work takes a certified firm and lead-safe practices ¹. If you're asked to blast off loose paint, check that rule, and any state lead program, before you bid.

Find out where your washwater may go

Every job sends water somewhere, carrying what you washed off (dirt, mildew, oil, grease, chalky oxidation, paint chips) plus what you put on (detergent, bleach, degreaser). Storm drains are built for rain. Under EPA's stormwater rules, an illicit discharge is any discharge to a municipal storm sewer system that isn't entirely stormwater (with listed exceptions), and the cities and counties those rules cover must prohibit non-stormwater discharges to the system, to the extent their law allows, and enforce that ban ². The details vary by place and can change with the surface and the chemicals, so get answers before you buy equipment; they decide what recovery gear you need.

Call your city or county stormwater program (it may sit in public works or environmental services), the local sewer authority and, if either points you there, your state environmental agency. Ask:

• May washwater from house washing or driveway cleaning reach a storm drain or street gutter at all? Does it matter whether you used only cold water, or detergent, bleach, degreaser or hot water?
• May you direct it onto lawns or landscaping instead, and under what conditions?
• Is water from restaurants, drive-thrus, dumpster pads, gas stations or vehicle washing handled differently because of oil and grease?
• If you must capture it, where may it go: the sanitary sewer with the sewer authority's permission, a disposal facility, or somewhere else?
• Do you need a permit, registration or training to wash commercially?
• Does the water utility restrict hard-surface washing or outdoor water use during droughts?

Write down who told you what, and when. If you must capture or divert water, add recovery gear (drain covers, berms, a vacuum unit or sump pump, a holding tank) to your list. Put each job's drainage plan in writing; the pressure washing estimate guide shows how to list it with plant protection and pre-existing damage notes. Property managers and commercial customers may ask how you handle washwater, and a clear answer helps win those accounts.

Learn the chemicals before you mix a batch

Soft washing runs on chemistry more than pressure. Many house and roof mixes are built on sodium hypochlorite, the active ingredient in household bleach, plus a surfactant to help the mix cling. Strengths vary by product, so read the percentage on every label before you set your mix ratios.

• Read the label and the safety data sheet (SDS) for every product before first use. Get the SDS from your supplier and keep a copy on the truck. It lists the product's hazards, protective equipment, first aid, storage and incompatible materials.
• Never let bleach meet acids or ammonia. Bleach mixed with a cleaner that contains an acid can release chlorine gas ³, and mixed with ammonia it can release chlorine or chloramine gas ⁴. Wood brighteners and rust removers are often acid-based, so the two can meet by accident in a shared bucket, tank or pump. Dedicate equipment to each chemical family and label every container.
• Wear what the SDS calls for. Plan on eye protection and chemical-resistant gloves as a floor, and keep clean water on the rig for flushing eyes and skin.
• Store and haul chemicals safely. Keep containers closed, upright and strapped down, away from heat, and keep bleach and acid products apart in the vehicle. Ask your supplier whether the quantities you'll carry bring in any transport rules.
• Protect plants and property. Soak plants before and after, cover delicate ones, watch where downspouts drain, and don't spray in the wind. Move or cover cars, patio furniture and anything else that could spot or discolor, and test a new mix on a hidden spot first.
• Watch your claims. If you advertise that you kill mold, mildew or algae, ask your state's pesticide regulator whether the products you use and the claims you make bring in pesticide labeling or licensing rules.

Once you have employees, OSHA's Hazard Communication standard requires a safety data sheet for each hazardous chemical you use, labeled containers, training and a written program ⁵. Before anyone else mixes or sprays for you, read hiring your first pressure washing employee for the training and safety side of adding a person.

Size equipment by flow, not just pressure

PSI (pounds per square inch) is how hard the water hits. GPM (gallons per minute) is how much water you move, and flow is what carries dirt away and sets your pace on big surfaces. Machines are often advertised by PSI, but two units with similar PSI can work very differently if one moves more water.

• Pressure washer. For daily use, look at belt-drive cold water units built for long run times. A hot water unit adds a burner and pays off on grease, oil and gum, mostly in commercial work. Hoses, guns and fittings must be rated for at least the machine's maximum pressure, and for heat if you run hot water.
• Surface cleaner. It gives flatwork an even finish a wand can't match. Larger ones need more flow, so size yours to your machine by the maker's recommendation.
• Soft wash system. A downstream injector draws chemical into the pressure washer's low-pressure stream after the pump, so what reaches the wall is much weaker than what's in your bucket: enough for lower walls and light jobs. A dedicated soft wash pump applies solution at the strength you mixed, which roofs and heavy growth often need. Buy pumps, hoses and fittings rated for the chemicals you'll run, because bleach is hard on some materials.
• Water supply. A supply or buffer tank covers you when the customer's spigot can't keep up. A backflow preventer on your hose connection keeps chemicals and dirty water from siphoning back into the customer's plumbing. Never fill a tank from a fire hydrant without the water utility's permission.

Test every spigot first: time how long it takes to fill a bucket of known size and compare that with your machine's GPM.

Example: A 5-gallon bucket takes 75 seconds (1.25 minutes) to fill from a customer's spigot, so the spigot delivers 5 ÷ 1.25 = 4 gallons per minute. If your machine is rated at 8 GPM, it pulls 4 GPM more than the spigot supplies whenever the trigger is down. For 30 minutes of nonstop surface cleaning, the shortfall is 4 × 30 = 120 gallons, so your buffer tank needs at least that much in it when you start. These are made-up numbers; measure your own.

Two safety rules come with the gear. Gas engines give off carbon monoxide: CDC says never to use a gasoline-powered pressure washer in an enclosed space or less than 20 feet from any window, door or vent ⁶. And never point a wand at a person. CDC urges anyone with a high-pressure spray wound to get medical attention as soon as possible ⁶, even if the wound looks small.

Treat roofs as soft wash work

The dark streaks on many asphalt shingle roofs are algae, and you remove them with chemistry, not pressure. The Asphalt Roofing Manufacturers Association (ARMA) says never to use a pressure washer on an asphalt shingle roof, because it causes granule loss and very likely premature failure of the roof. Its guidance is a 50:50 mix of laundry-strength liquid chlorine bleach and water, sprayed on gently, left 15 to 20 minutes, then rinsed with low-pressure water, without scrubbing ⁷. ARMA also notes that cleaning is only temporary and the discoloration may come back ⁸.

Before you sell roof work:

• Look up the shingle manufacturer's own cleaning guidance, and follow the cleaning product's label.
• Ask what the roof is made of. Tile, metal, wood shakes and slate each have their own cleaning guidance and ways to break.
• Plan for falls. A roof wet with cleaning solution is slippery, so apply from the ground or a ladder where your equipment reaches, and settle fall protection and training before anyone walks a roof.
• Protect what's below. Solution runs into gutters and out of the downspouts onto beds and lawns, so soak, cover, redirect and rinse.
• Set expectations in writing. Streaks don't always disappear while you're on site and can return, so tell the customer what to expect and when.

Insure for the damage this work can cause

The incidents to raise with an agent are mostly property damage (plants killed by runoff, overspray on a neighbor's car, spotted glass, paint stripped off trim, water forced behind siding or into an outdoor outlet) plus slips on wet walkways. Get quotes before you set prices, because premiums are part of every job's cost.

Bring these questions to an agent who insures cleaning or exterior contractors:

• Does the general liability policy exclude or limit damage to the part of the property you're working on, as opposed to the rest of the property?
• Does a pollution exclusion apply to chemical runoff, overspray or washwater, and should you add pollution coverage?
• Is roof work, or work above a certain height, excluded or priced differently?
• What limits and additional insured wording do HOAs, property managers and commercial customers ask for on a certificate of insurance?
• How are the truck, trailer and equipment covered on the road, parked overnight and on a job site?
• When does your state require workers' compensation, and what will it cost on your expected payroll?

Register the business and ask about licenses

Form the business (an accountant can help you choose between a sole proprietorship and an LLC), open a business bank account and register any trade name you'll use. Then ask about licenses, because the rules for exterior cleaning vary:

• City or county: whether you need a general business license, and whether mobile washing needs its own permit (this may come up in your stormwater calls).
• State: whether pressure washing counts as contracting or home improvement work under your state's definitions. Ask the state contractor licensing agency or consumer protection office directly, and get the answer in writing.
• Sales tax: some states tax cleaning services and others don't, so ask your state revenue department before you set prices.

HOAs, property managers and commercial customers often want a W-9 and a certificate of insurance before they approve your first invoice, so have both ready.

Price from your own costs

Start with what an hour of your time costs to deliver, counting drive time, setup and teardown, chemicals, water, fuel and equipment wear (how to set your labor rate). Then use how to price pressure washing jobs to turn that into square-foot, per-job and minimum prices.

The minimum charge matters more in this trade than it looks, because setup and teardown don't shrink with the job.

Example: Suppose a small patio takes 30 minutes to wash, the round trip takes 40 minutes, and unloading, plant prep, rinsing and packing up take another 35 minutes. That's 105 minutes (1.75 hours) for 30 minutes of cleaning. If an hour of your time costs $100 to deliver once overhead is counted, the visit costs $175 before chemicals and fuel (1.75 × $100). Price that patio by the square foot alone and it can come in well under cost. These are made-up numbers; use your own.

Plan for repeat work and the off-season

Siding, driveways and roofs get dirty again, so every finished job is a future job: record what you cleaned, how and when, so you can remind each customer when it's due. Storefronts, drive-thrus, dumpster pads and HOA common areas can run on recurring schedules, which smooths cash flow. How to get more pressure washing customers covers door hangers, neighborhood marketing and commercial accounts, and the pressure washing seasonal playbook covers booking ahead for spring and planning for winter.

Startup costs by category

Your budget depends on the services you picked; roofs, greasy commercial work and water recovery each add gear. Get quotes in your market for each line:

Startup checklist

1. Choose your starting services, and decide whether paint removal is on the menu.
2. Get local washwater rules in writing and buy the recovery gear they require.
3. Read every SDS, keep bleach and acid equipment separate, and buy protective gear.
4. Buy equipment sized by flow as well as pressure, and test spigots before relying on them.
5. Read the shingle manufacturer's cleaning guidance before selling roof work.
6. Get insurance quotes with the damage, pollution and roof questions answered.
7. Register the business and confirm city, state and sales tax requirements.
8. Set your labor rate, a minimum charge and a price for each service.
9. Record every customer and job so annual reminders go out on time.