Pressure Washing Permit Requirements in St. Louis, MO

Complete permit and license guide for starting a pressure washing in St. Louis, St. Louis City, Missouri.

Updated 2026-03-01 6 stops $150–$750 est. 1–3 weeks to obtain all required licenses and insurance
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Not legal advice. Requirements may change — always verify with your local government authority before applying. This guide was compiled from public and official sources (last updated ) and has not yet been independently source-verified — confirm each requirement before acting on it.

Federal — start here

1 stop

  1. EIN (Employer Identification Number)

    Required if you have employees or operate as an LLC/corporation. Free from the IRS.

    Official government source

    FreeImmediate (online)

State of Missouri

2 stops

  1. Missouri Retail Sales License

    Required for businesses selling tangible personal property in Missouri. Register with the Missouri Department of Revenue.

    Official government source

    Free1–2 weeks

  2. General Liability Insurance

    Pressure washing businesses in Missouri should carry general liability insurance ($1M minimum per occurrence) to cover property damage. Most commercial clients and property managers require proof of insurance before hiring. Vehicle insurance is also required if using a company vehicle.

    $500–$1,500/yearSame day (online quotes)

City of St. Louis / St. Louis City

3 stops

  1. St. Louis Business License

    All businesses operating in St. Louis must obtain a general Business License from the St. Louis City Clerk's Office before conducting any commercial activities. Pressure washing companies must renew annually and may be subject to gross receipts-based fees.

    Official government source

    $25–$100/year1–3 weeks

  2. Stormwater / Wastewater Discharge Compliance

    Pressure washing businesses in St. Louis must comply with local stormwater ordinances. Wastewater containing detergents, oils, or other pollutants cannot be allowed to enter storm drains. You may need to contain and properly dispose of wastewater. Contact St. Louis City Environmental Health for specific requirements.

    Official government source

    No permit fee (compliance requirement)Ongoing compliance

  3. DBA (Doing Business As) Registration

    If operating under a trade name, file a Fictitious Business Name with St. Louis City before accepting jobs under that name.

    $15–$501–2 weeks

Terminus

Open for business — est. $150–$750 · 1–3 weeks to obtain all required licenses and insurance

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