Mobile Car Wash Permit Requirements in Dover, DE

1. EIN (Employer Identification Number)

   Required if you have employees or operate as an LLC or corporation. Free from the IRS, obtained instantly online.

   Official government source

   Free·Immediate (online application)

   Free

   Immediate (online application)

2. EPA Stormwater Compliance — Clean Water Act Section 402

   Mobile car wash operations that discharge wash water are subject to the federal Clean Water Act. The EPA's National Pollutant Discharge Elimination System (NPDES) prohibits discharge of polluted wash water to storm drains or waterways without a permit. Most mobile operators achieve compliance by using containment systems and disposing of water via sanitary sewer. Larger operations (e.g., fleet washing facilities) may require an NPDES permit.

   Official government source

   Free (containment equipment: $200–$1,500)·Before first wash

   Free (containment equipment: $200–$1,500)

   Before first wash

1. Delaware Business Registration (Division of Corporations)

   Mobile car wash and auto detailing businesses operating in Delaware must register with the Delaware Division of Corporations if structured as an LLC, corporation, or limited partnership. Sole proprietors using a trade name must register it with the Delaware Division of Revenue through Delaware One Stop — as of February 2, 2026 the Division of Revenue administers the statewide trade name (DBA) registry and filings are no longer made with the county Superior Court Prothonotary. An LLC is recommended to protect personal assets, since mobile operations work on customers' property. Every business also needs a Delaware business license from the Division of Revenue.

   Official government source

   $110 for an LLC Certificate of Formation; $109 minimum for a Certificate of Incorporation (rises with authorised shares); plus $25 for a trade name registration if you use one·1–7 business days online; 24-hour and same-day expedited service available for an extra fee

   $110 for an LLC Certificate of Formation; $109 minimum for a Certificate of Incorporation (rises with authorised shares); plus $25 for a trade name registration if you use one

   1–7 business days online; 24-hour and same-day expedited service available for an extra fee

2. Delaware DNREC — Wash Water Discharge Compliance

   Mobile car wash operations generate wastewater containing detergents, surfactants, oils, and road grime. Delaware's environmental agency is DNREC (Department of Natural Resources and Environmental Control) — Delaware has no 'Department of Environmental Quality'. Consistent with federal Clean Water Act rules, discharging wash water to storm drains, street gutters, or waterways is prohibited; operators must capture wash water and dispose of it to a sanitary sewer or an approved facility. A DNREC NPDES surface water discharge permit is required only if wash water is discharged to surface waters.

   Official government source

   No DNREC permit or fee for operations that contain wash water and dispose of it properly; an NPDES permit (fee set by DNREC) is required only for a discharge to surface waters·Immediate with self-compliance; permit review applies only if a surface water discharge is proposed

   No DNREC permit or fee for operations that contain wash water and dispose of it properly; an NPDES permit (fee set by DNREC) is required only for a discharge to surface waters

   Immediate with self-compliance; permit review applies only if a surface water discharge is proposed

1. Dover General Business License

   All mobile car wash and auto detailing businesses operating in Dover must obtain a general business license from the city under the 'Car wash' license category. Renewed annually.

   Official government source

   $192/year (flat fee, Dover business-license 'Car wash' category)·1–2 weeks

   $192/year (flat fee, Dover business-license 'Car wash' category)

   1–2 weeks

2. Dover Stormwater / Wash Water Discharge Compliance

   Dover prohibits discharging mobile car wash wastewater into storm drains, gutters or waterways — wash water carries detergents, oils and road grime. Operators should use a portable containment berm or mat to capture runoff, vacuum or pump the water up, and dispose of it at an approved sanitary sewer access point or licensed disposal facility with the utility's approval. This is an illicit-discharge prohibition under the City's MS4 obligations, not a permit you apply for: Public Works may inspect and violations can bring fines, but there is no registration and no fee.

   Official government source

   No permit or registration fee; costs are the containment equipment and disposal you arrange yourself·Immediate — self-comply before operating

   No permit or registration fee; costs are the containment equipment and disposal you arrange yourself

   Immediate — self-comply before operating

3. Delaware DNREC — Hazardous Waste Requirements (if applicable)

   There is no Kent County Environmental Health chemical-use registration for mobile detailing businesses — Delaware has no county environmental health agency, and environmental oversight is statewide through the Department of Natural Resources and Environmental Control (DNREC). Most mobile detailers use consumer-scale cleaning products and are not regulated hazardous waste generators; DNREC's waste and hazardous substances rules apply only if regulated quantities of hazardous waste are generated or stored.

   Official government source

   No county registration or fee; DNREC hazardous waste generator requirements apply only above regulatory thresholds·Not applicable unless DNREC hazardous waste generator status is triggered

   No county registration or fee; DNREC hazardous waste generator requirements apply only above regulatory thresholds

   Not applicable unless DNREC hazardous waste generator status is triggered

4. Dover Home Occupation Compliance (if operating from a residence)

   Dover does not issue a separately named or separately priced 'Home Occupation Permit'. A mobile car wash operator who bases the vehicle, equipment and supplies at a residential address must comply with the home-occupation provisions of the city's Zoning Ordinance — no client or employee traffic at the residence, no exterior signage, and no bulk chemical storage — and must still hold the standard City of Dover business license. Confirm zoning compliance with Planning and Inspections before starting.

   Official government source

   No separate home-occupation fee; the city business license applies — $52/year for a business with 1–3 employees not otherwise listed in Appendix F·1–3 weeks

   No separate home-occupation fee; the city business license applies — $52/year for a business with 1–3 employees not otherwise listed in Appendix F

   1–3 weeks

Official Sources

• Dover Business Licensing
• Delaware Environmental Quality — Water Programs
• EPA NPDES — Stormwater Discharges
• IRS EIN Application

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