Key takeaways
- If you already run trucks, a pressure washing rig can fill slow seasons using a yard, an office and a customer list you already pay for.
- Check three things before the first paid job: your state's contractor licensing rules, your insurance, and where the wash water is allowed to go.
- Never send wash water to a storm drain. Cities can fine for it, and some fine heavily.
- Price residential work flat-rate and commercial work by area or by contract, with room in the price for slower commercial payment terms.
- Every revenue figure in this guide is a labeled assumption. Replace them with your own quotes before you believe any of them.
If you already run a route business, whether septic, grease, lawn or something else, you have the expensive parts of a pressure washing business already: trucks, a dispatcher, insurance relationships and a customer list. A washing rig costs a fraction of a new service truck, and it can earn in the months your main trade slows down. This checklist covers what to sort out before the first paid job: licensing, insurance, wash-water rules, equipment, pricing and first-year revenue math, with every assumption labeled so you can swap in your own numbers.
Why does pressure washing pair well with an existing route?
Most of your overhead is already paid for. The office, the scheduling, the invoicing and the customer relationships are in place, so each washing job mainly has to cover its own labor, chemicals and equipment.
Your existing customers are also the easiest first sale. The property owner whose tank you pumped has a driveway. The restaurant whose grease trap you service has a dumpster pad. The commercial lot you sweep or seal has a storefront. You already have their phone numbers and their trust.
Washing also pairs naturally with lawn care and sealcoating: same customers, same properties, often opposite seasons.
What licensing does a pressure washing business need?
Most states don't issue a pressure washing license as such. What you need depends on your state and city, and usually falls into one of three situations:
| Situation | What you need |
|---|---|
| General business only | A city or county business license or tax registration |
| State contractor rules apply | A state contractor license or registration, often above a dollar threshold per job |
| Commercial wash-water rules apply | Approval for where the water goes, sometimes a discharge permit |
California is a clear example of the dollar threshold. Since January 1, 2025, work under $1,000, including all costs, can be done without a contractor's license only if you don't hire workers and no building permit is needed (CSLB). Hire a helper and that exemption is gone.
Because you already run a business, most of the basic registration is done. If you're adding washing to an existing company, check two things with your accountant: whether your state taxes the new service, and whether your existing licenses and business registration cover it or you need to add it.
What insurance does pressure washing need?
Before the first paid job, talk to your agent about four kinds of cover: - General liability. It covers damage and injuries you cause on a job: cracked siding, broken windows, etched concrete, stripped paint. Commercial property managers will ask for a certificate before you unload. - Commercial auto. It covers the truck and trailer. Make sure the washing rig and trailer are listed. - Equipment cover. An inland marine policy or a contractor's equipment floater covers the washer, surface cleaner, hoses and pumps. - Workers' compensation. Most states require it once you have employees. Rules and thresholds vary by state.
You likely already carry some of these. Washing adds new kinds of risk, chemical overspray and water damage among them, so ask whether your current policies cover the new work rather than assuming they do. When you compare quotes, set identical limits and deductibles, then compare the exclusions, not just the premium.
Where can wash water go?
This is the rule that catches new washing businesses. Wash water carries soap, oil, grease, paint chips and dirt, and in most cities it must not reach a storm drain. San Diego's guidance for mobile washers is typical: "Never discharge wastewater into a street, ditch, storm drain, or maintenance hole," with penalties of up to $10,000 per day per incident (City of San Diego).
The same guidance lists the usual approved options: - Landscaping: with the property owner's permission, as long as there is no runoff. - The sanitary sewer: through a private connection on the property, such as a sink, toilet or cleanout, not a storm drain. - Collect and haul: recover the water and take it to an approved disposal site.
Rules vary by city, so check with each city's stormwater program before you quote commercial work. If you already pump and haul, you may be well placed to collect and dispose of wash water properly, which many washing-only competitors can't. Agree with the client in writing where the water goes, and keep it with the job record.
What equipment do you need to start?
A common starting rig for residential driveways and siding is a gas washer around 4 gallons per minute and 3,500 PSI, a 16-inch surface cleaner, about 100 feet of hose, and a downstream injector for applying soft-wash solutions at low pressure. Soft washing with a sodium hypochlorite mix, rather than high pressure, is the standard for siding and roofs.
Before you buy: - Rent first. Renting a washer for your first couple of jobs tells you whether the work suits your crew before you commit. - Buy used carefully. Used commercial units can cut startup cost sharply, but check pump hours and seals. - Hold off on hot water. A hot-water unit or a full trailer build-out makes sense once commercial grease and oil work justifies it. - Plan for water. Commercial clients often expect you to bring your own water or reclaim it, so ask about water access before quoting.
How do you price residential and commercial work?
These ranges are illustrative, not quotes. Build your own from local competitors' prices, your water access and your drive time.
- Residential, flat rate. Driveways and house washes usually price per job, roughly $150 to $300 for a driveway and $250 to $500 for a house wash. Once you've done a type of job twice, quote it flat.
- Commercial, by area or contract. Large flat surfaces such as parking areas and fleet pads price well per square foot. Recurring commercial contracts, such as a monthly storefront, a quarterly dumpster pad or an annual fleet wash, pay less per job but fill the calendar.
- By the hour. Use it only for jobs with an unknown scope. It invites the customer to watch the clock.
Commercial clients often pay on net-30 terms or longer, so leave room in the price for waiting on payment.
Bundle with stops you already run
A washing job at a site you already visit costs minutes, not a separate truck roll. Before you bundle, check that the wash-water plan works for that site, especially around grease and food waste.
How much can pressure washing add in the first year?
Nobody can give you a real revenue number for your market. Here are three worked scenarios, each built from labeled assumptions you should replace with your own:
| Scenario | Assumptions | Gross revenue |
|---|---|---|
| Side rig on existing routes | 10 jobs a week × $250 average × 39 weeks | $97,500 |
| Dedicated washing truck | 20 jobs a week × $225 average × 40 weeks | $180,000 |
| Commercial-focused | 8 jobs a week × $900 average × 40 weeks | $288,000 |
These are gross figures, before labor, chemicals, fuel, insurance, equipment and disposal. The dedicated truck also needs a driver. The commercial scenario assumes you can win and keep enough contracts at that ticket size, which takes time. Treat every number in this table as a starting point to test, not a forecast.
How do you keep the paperwork from piling up?
Washing adds a new kind of record to your business: before-and-after photos, the square footage or job scope, what was applied, where the water went, and whether the customer signed off. If that lives on paper and gets typed in at night, it gets lost, and the photos that protect you in a damage dispute go with it.
Whatever software you use, test these in a demo: - Can the crew capture before-and-after photos on the job and send the customer a report? - Can you set recurring commercial visits and rebooking reminders for residential customers? - Does it work with no signal? - Can washing run in the same account as your existing trade, on the same schedule? - What does adding seasonal help cost? Per-user pricing goes up with every hire; per-truck pricing goes up with every truck. Work out both for your own numbers using our pricing comparison.
Where RouteHouse stands: RouteHouse for Pressure Washing is priced per truck with unlimited users. Crews send before-and-after photo reports from the job, commercial work runs on recurring routes, and residential customers get rebooking reminders. It runs in the same app as your other trades, so washing goes on the same schedule as the work you already do, and added trades on an existing account are discounted. The app works offline and in English or Spanish.
Where RouteHouse falls short
- Chemical records: RouteHouse records what was applied on each job. It isn't a chemical-compliance or applicator-licensing system.
- Warranties: if you offer a soft-wash warranty, RouteHouse tracks the warranty window. The warranty itself is yours.
- Card payments offline: the app works with no signal, but taking a card needs a connection.
- Track record: RouteHouse launched in 2026 and doesn't have a G2 or Capterra review history yet. Ask for references.
For the full software demo checklist, see the work order software buyer's guide.
Your 30-day launch checklist
Week 1: paperwork. Check your state's contractor rules and your city's wash-water rules. Ask your agent to review your liability, auto and equipment cover for washing, and get a certificate of insurance ready for property managers.
Week 2: equipment and prices. Rent or buy the rig, choose a chemical supplier, and price five residential jobs and one commercial site using the pricing section above.
Week 3: first customers. Offer washing to your existing route customers first. Add the service to your website and Google Business Profile, and call the commercial contacts you already have.
Week 4: first jobs. Run the first paid jobs, collect payment the same day, and record time, materials and cost per job, so next month's quotes come from your own numbers instead of guesses.
Frequently asked questions
Do I need a license to start pressure washing?
Most states don't have a pressure washing license, but many have contractor licensing rules that can apply once a job passes a dollar threshold or you hire help. California, for example, requires a contractor's license for work of $1,000 or more, or for smaller jobs if you hire workers. Check your state contractor board and your city.
Can pressure washing water go into a storm drain?
In most cities, no. Wash water usually has to go to landscaping with no runoff, to the sanitary sewer through a private connection, or be collected and hauled to an approved site. Penalties for storm-drain discharge can be steep. Check each city's stormwater rules.
What insurance does a pressure washing business need?
Typically general liability, commercial auto for the truck and trailer, equipment cover for the rig, and workers' compensation once you have employees. If you're adding washing to an existing business, ask your agent whether your current policies cover the new work.
How much should I charge to pressure wash a driveway?
As an illustration, many operators charge roughly $150 to $300 for a residential driveway, but local prices vary widely. Check local competitors, factor in your drive time and water access, and quote flat once you've done the job type a couple of times.
Is adding pressure washing better than buying another service truck?
It can be, if your current trucks and crews have slack in some seasons. A washing rig costs far less than a new service truck and uses the office, scheduling and customer list you already have. Run the numbers with your own job counts and prices before deciding.