Adding pressure washing and soft washing services

Why cleaning companies add exterior work

A residential cleaning company already has what an exterior cleaning service needs most: homeowners who trust it, a schedule that brings crews to the same neighborhoods every week, and an office that books recurring work. Driveways, siding, decks, fences and patios get dirty on a predictable cycle, and many homeowners would rather add a line to a bill they already pay than find a new contractor.

The work also has a different season from interior cleaning in many regions, with spring and early summer peaks for siding, decks and concrete, and a fall push before holidays. That can keep trained staff busy when interior demand flattens.

What homeowners plan to spend on

Upkeep leads homeowners' plans. In Angi's survey, regular maintenance was the top planned home project for US homeowners, at 32%, ahead of interior painting at 20%^[1]. Exterior cleaning sits squarely in that maintenance category, and it is easy to show results with before-and-after photos.

Reliability is a selling point. The same survey found 53% of homeowners reported difficulty finding pros in 2025^[1]. An established cleaning company that answers the phone, shows up on time and already carries insurance has an advantage over the many one-truck operators in this field.

Pressure washing vs. soft washing

Most companies need both. A useful rule for training: if the surface could be damaged by a garden hose held too close, it is a soft-wash surface.

Equipment decisions

• Cold-water or hot-water pressure washer: hot water cuts grease and oil on driveways and commercial pads, at higher cost and weight.
• Surface cleaner for flat concrete, which is faster and more even than a wand.
• Soft-wash system: a low-pressure pump, chemical tank and a way to proportion solution consistently.
• Water supply: a buffer tank, because many homes cannot supply enough flow from an outdoor tap.
• Wastewater controls: storm drain covers, berms, and a recovery vacuum or pump where collection is needed.
• Plant protection: tarps and pre-wetting, plus a rinse plan.
• Personal protective equipment matched to the cleaning solutions you use, including eye and skin protection.

Wastewater and runoff rules

This is where new exterior cleaning companies most often get into trouble. Ohio EPA's fact sheet for mobile power washers states that even if you use biodegradable soaps or detergents, the wastewater is still defined as industrial wastewater and must be properly managed, and that power washing companies can violate the Clean Water Act by letting wastewater run into creeks, lakes or the ditches and storm sewers that lead to them^[2]. One option it describes is discharging to a sanitary sewer with authorization from the local treatment works, and it is explicit that you cannot discharge wastewater directly into storm drains^[2].

Rules vary by state, county and city, and many municipalities enforce them through their stormwater programs. Before selling the service, call your city or county stormwater office and ask three questions: what you must do with wash water on residential jobs, what is required on commercial lots, and whether you need a permit or authorization to discharge to the sanitary sewer.

1. 01

   Inspect the site

   Find storm drains, gutters and slopes before you start; most outdoor drains lead to surface water, not to treatment.

2. 02

   Block and divert

   Cover drains and use berms to keep wash water on site or direct it to an approved area.

3. 03

   Clean dry first

   Sweep and remove debris before applying water, so less material ends up in the wash water.

4. 04

   Collect where required

   Recover wash water with a vacuum or pump and dispose of it in the way your local authority approves.

5. 05

   Record it

   Note on the job record how wastewater was managed, which helps if a neighbor or inspector asks.

Older homes and lead paint

Cleaning painted siding on older homes can disturb paint. EPA's Renovation, Repair and Painting rule requires anyone paid to disturb painted surfaces in pre-1978 homes, child care facilities and preschools to be certified and their employees trained in lead-safe work practices^[3]. If your crews will remove or loosen paint, for example when washing as paint preparation, check whether the rule applies and get certified before taking that work, and contain debris accordingly.

Safety and insurance

Exterior cleaning combines water, ladders, rooftops and chemicals. Work fatalities among building and grounds cleaning and maintenance workers rose to 356 in 2024^[4]. Write procedures for ladder use, roof access, chemical handling and electrical hazards near wet surfaces, and train every crew member before the first job.

• Tell your insurer you are adding exterior and roof cleaning; many policies limit roof work or chemical damage.
• Ask whether coverage includes damage to the customer's property, such as etched glass, stripped paint or killed plants.
• Photograph every surface before work, and note existing damage on the work order with the customer.
• Check workers' compensation classifications for exterior and roof work.

Pricing and selling it

Price by surface and area, not by hour, so customers can compare and crews have a reason to work efficiently. Build in setup, water supply, wastewater controls and travel. Sell it first to existing customers, with photos from your own jobs, as a seasonal add-on or a once-a-year package.

Example: a crew might quote a two-car driveway, a front walk and a vinyl-sided single-story home as one package. If the crew takes three hours including setup and wastewater controls, the price must cover two people at their loaded rate, chemicals, equipment wear and the drive, plus margin. Time your first ten jobs to set real production rates.

Preparing the customer

Most exterior cleaning complaints come from expectations, not workmanship. Send a short preparation message two days before the visit, and have the crew walk the property with the customer, or photograph it, before starting.

• Close windows and doors, and move cars, furniture, grills and planters away from work areas.
• Keep pets and children inside during the visit.
• Tell us about loose siding, cracked windows, recent paint or fresh sealant, and any plants you want protected.
• Confirm the outdoor tap works; we may bring our own water if flow is low.
• Expect some stains, such as rust, oil and deep mildew in porous surfaces, to lighten rather than disappear.

Add-on or separate crew?

• Add-on with existing crews works when the volume is small and seasonal, and crews are trained and equipped for it.
• A dedicated exterior crew makes sense when demand fills most weeks in season, equipment is expensive enough to need full use, and the skills, especially soft washing, need specialists.
• Subcontracting to an established exterior cleaner is a reasonable test of demand before you buy equipment.

Commercial exterior work

Storefronts, restaurant patios, dumpster pads, drive-throughs and parking garages bring recurring exterior cleaning contracts, often at night. They also bring heavier grease and oil, larger volumes of wash water and closer attention from local stormwater inspectors. Many commercial clients will ask how you handle wastewater before they ask your price. Treat commercial exterior work as its own service with hot-water equipment, recovery systems and a written wastewater plan for each site, rather than an extension of residential driveway jobs.

Example: a cleaning company adds exterior washing

Example (fictional): Fresh Start Home Cleaning offered exterior washing to its recurring customers in March. The owner bought a cold-water pressure washer, a surface cleaner and a small soft-wash setup, called the city's stormwater office about wash water, and bought drain covers and a recovery vacuum for driveway jobs. Two cleaners trained with an equipment supplier for two days.

The company booked 41 exterior jobs that spring, all from existing customers. The one damage claim, a stained window frame from overspray, led to a rule that crews pre-wet and rinse all trim on soft-wash jobs. For related service lines, see adding air duct cleaning and moving into commercial cleaning.