Unlicensed pressure washing contractors often undercut licensed competitors by skipping insurance, bonding, and safety training—leaving you liable if something goes wrong. A cheaper quote might seem tempting until your vinyl siding gets permanently damaged or someone gets injured on your property. Here's how to identify the red flags before you hand over a deposit.
Check Licensing and Insurance First
Most states don't require pressure washing licenses at the state level, but many municipalities do. Start by calling your local building department or city code enforcement office to ask what licensing is required in your area. If licensing applies where you live, ask the contractor directly for their license number and verify it on the relevant government database.
Insurance is non-negotiable. A legitimate contractor carries general liability insurance (typically $300,000 to $1,000,000 in coverage) and workers' compensation if they have employees. Ask for a current Certificate of Insurance and actually call the insurance company to confirm it's active—don't just accept a copy they hand you. Uninsured contractors mean you're financially responsible if their equipment damages your roof or if a worker is injured.
Look for Business Registration and Bonding
Check whether the contractor is registered as a business in your state. You can search the Secretary of State's business database (usually free online) to see if they're operating as a legitimate entity. A genuine pressure washing company will have an EIN (Employer Identification Number) and will show up in official records.
Bonding is less common in pressure washing than in construction, but some areas require it. If your municipality mandates bonding, verify the contractor has it. A bond protects you if the contractor takes payment and never completes the work.
Red Flags to Watch For
Several warning signs suggest you're dealing with an unlicensed operator:
- Cash-only payments with no invoice or receipt
- No physical business address—only a cell phone number or P.O. box
- Reluctance to provide references or insurance information
- Extremely low quotes compared to licensed competitors (pressure washing typically ranges $300–$800 for house exteriors, $500–$2,000+ for roofs)
- No online presence or business website
- Vague descriptions of their process or equipment type
- No written contract—just a verbal agreement
Legitimate contractors will have a website, social media presence, customer reviews, and a physical office or mailing address. They'll provide detailed written estimates that specify pressure PSI, cleaning method (hot water vs. cold), and what surfaces they'll treat.
Verify References and Online Reviews
Ask for at least three customer references and actually call them. Ask specifically about the quality of work, whether the contractor showed up on time, if they cleaned up properly, and whether any damage occurred. Check Google, Yelp, and the Better Business Bureau for authentic reviews. Be skeptical of contractors with zero online footprint or suspiciously perfect ratings across all platforms.
Request a Written Contract
A professional contractor provides a detailed written contract that includes:
- Scope of work (which surfaces, cleaning method, equipment specifications)
- Timeline and start/completion dates
- Total cost and payment schedule
- Warranty or guarantee (most legitimate contractors guarantee results for 30–90 days)
- Liability and damage clauses
- Cancellation terms
If they refuse to put it in writing, that's a major red flag.
Get Multiple Quotes
Request estimates from at least three contractors, preferably through services like Mercoly where you can compare and find trusted pressure washing providers in one place. This helps you identify outliers. If one quote is significantly lower ($200 for a house wash when others quote $500), ask why. They might use lower PSI, skip hard-to-reach areas, or lack proper insurance.
Verify Equipment and Safety Practices
Ask what equipment they use and whether they adjust pressure based on surface type. Soft washing (1,500 PSI or less with detergent) is appropriate for roofs and delicate surfaces, while pressure washing (2,500+ PSI) suits driveways and concrete. If they say they use the same pressure for everything, they don't know their trade.
Frequently Asked Questions
Q: What's a typical price range for pressure washing a house exterior? Licensed contractors usually charge $300–$800 depending on home size, siding material, and how dirty it is. Significantly lower quotes suggest corners are being cut.
Q: Can I verify a pressure washing contractor's license online? It depends on your location. Some states and cities publish databases online, while others require a phone call to the local permit office. Always verify directly rather than taking the contractor's word for it.
Q: Should I be concerned if a contractor won't provide insurance proof? Absolutely. A contractor without insurance is likely unlicensed and uninsured, which puts you at risk for damage claims and liability if someone is injured.
Start your search today by comparing licensed, insured pressure washing contractors in your area.