Mobile Car Wash Permit Requirements in Green Bay, WI

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. Wisconsin Business Registration

   Mobile car wash and auto detailing businesses operating in Wisconsin as an LLC, corporation, or partnership register with the Wisconsin Department of Financial Institutions (DFI); Wisconsin has no Secretary of State business-filing role. Wisconsin's DBA (fictitious name) filing under Wis. Stat. 134.17 is narrow: it applies only when a name purporting to be a corporate name is used with intent to obtain credit, and it is recorded with the county Register of Deeds - not a general requirement for all trade names. An LLC is worth considering to protect personal assets, since mobile operations working at customers' properties carry inherent liability.

   Official government source

   DFI filing fees: limited liability company $130 online / $170 by paper; business corporation $100; limited partnership $70; nonstock corporation $35. Annual report thereafter $25 online ($40 by paper) for an LLC or business corporation.·DFI does not publish a guaranteed standard turnaround; paid expedited service is available at $100 (next business day), $250 (four hours, in person) or $500 (one hour, in person).

   DFI filing fees: limited liability company $130 online / $170 by paper; business corporation $100; limited partnership $70; nonstock corporation $35. Annual report thereafter $25 online ($40 by paper) for an LLC or business corporation.

   DFI does not publish a guaranteed standard turnaround; paid expedited service is available at $100 (next business day), $250 (four hours, in person) or $500 (one hour, in person).

2. Wisconsin Environmental / Stormwater Compliance

   Mobile car wash operations generate wastewater containing detergents, surfactants, oils and road grime. Wisconsin rules, consistent with federal Clean Water Act requirements, prohibit discharging this wash water to storm drains, street gutters or waterways. Operators must use a wastewater containment mat and recovery system (wet/dry vacuum or pump), or ensure wash water goes to a sanitary sewer inlet. The state agency is the Wisconsin Department of Natural Resources (DNR) - Wisconsin has no 'Department of Environmental Quality.' Operators using hazardous cleaning solvents or degreasers should check DNR hazardous waste requirements.

   Official government source

   No permit fee for ordinary mobile operations - this is a discharge prohibition and an ongoing compliance obligation, not a permit you apply for. A WPDES permit fee would apply only if DNR determines a specific discharge requires a permit.·Ongoing compliance - there is no application step for ordinary operations.

   No permit fee for ordinary mobile operations - this is a discharge prohibition and an ongoing compliance obligation, not a permit you apply for. A WPDES permit fee would apply only if DNR determines a specific discharge requires a permit.

   Ongoing compliance - there is no application step for ordinary operations.

3. Wisconsin Sales Tax Registration

   Car washing and auto detailing labor are generally NOT subject to Wisconsin sales tax - Wisconsin taxes only an enumerated list of services and car wash and detailing are not on it (WI DOR Publication 201). If you separately sell taxable tangible products such as waxes, air fresheners or merchandise, register with the Wisconsin Department of Revenue for a seller's permit and collect and remit state and county sales tax on those sales.

   Official government source

   No tax applies to car wash or detailing labor. If you make taxable product sales, the seller's permit costs $20 for the initial two-year Business Tax Registration and $10 to renew every two years (Wisconsin DOR).·Register online and the permit number arrives by email in one to two business days; the paper permit is sent seven to ten business days after the application (Wisconsin DOR).

   No tax applies to car wash or detailing labor. If you make taxable product sales, the seller's permit costs $20 for the initial two-year Business Tax Registration and $10 to renew every two years (Wisconsin DOR).

   Register online and the permit number arrives by email in one to two business days; the paper permit is sent seven to ten business days after the application (Wisconsin DOR).

1. Green Bay General Business License

   Green Bay does not require a general/all-purpose business license. The City Clerk's office (Green Bay Municipal Code Ch. 10) licenses only specific regulated categories (e.g. Adult Entertainment, Alarm Business, Direct Seller/Solicitor, Entertainment Facility, Home-Based Businesses, Junk Collector, Massage Establishments, Mobile Food Vendor, Public Vehicle, Salvage, Secondhand Dealer, Tree & Brush Trimmer). Mobile car wash and auto detailing are not a regulated category on the City Clerk's license list, so no general business license is required for this business type in Green Bay.

   Official government source

   not applicable·not applicable

   not applicable

   not applicable

2. Stormwater / Wastewater Discharge Compliance

   Green Bay prohibits discharging mobile car wash wastewater into storm drains, gutters or waterways. Wash water carries detergents, oils and road grime. Use a containment berm or mat to capture runoff, vacuum or pump the wash water up, and dispose of it to a sanitary sewer connection or a licensed disposal facility. The rules come from Wisconsin DNR stormwater regulation and the City's own storm water ordinance (Green Bay Municipal Code Ch. 16) enforced by Public Works - not from a city business licence page. There is no registration to file; violations are enforced against the discharge itself.

   Official government source

   No permit fee for ordinary mobile operations - this is a discharge prohibition and an ongoing compliance obligation, not a permit or registration you apply for. Green Bay's $500.00 storm water management plan permit fee (Sec. 16-82) applies only to regulated land-disturbing or construction activity.·Ongoing compliance - there is no application or self-certification step before operating.

   No permit fee for ordinary mobile operations - this is a discharge prohibition and an ongoing compliance obligation, not a permit or registration you apply for. Green Bay's $500.00 storm water management plan permit fee (Sec. 16-82) applies only to regulated land-disturbing or construction activity.

   Ongoing compliance - there is no application or self-certification step before operating.

3. No Brown County Chemical-Use Registration for Mobile Detailing

   Brown County does not run a chemical-use registration program for mobile detailing businesses, and none appears on Brown County Health & Human Services' business licensing list. Maintaining a Safety Data Sheet for each chemical and storing and disposing of cleaning agents, degreasers and solvents properly are general obligations under the federal OSHA Hazard Communication Standard and Wisconsin DNR hazardous waste rules - not a local permit. Contact Brown County Environmental Health at (920) 448-6400 if you handle chemicals beyond ordinary car wash products.

   Official government source

   $0 - no county chemical-use registration exists.·Not applicable - there is no registration to apply for.

   $0 - no county chemical-use registration exists.

   Not applicable - there is no registration to apply for.

4. Green Bay Home Occupation Application (if operating from residence)

   Mobile car wash operators who store their vehicle, equipment and supplies at a residential address in Green Bay may need a Home Occupation Application (Green Bay Municipal Code Ch. 44, Art. XVI, Sec. 44-1587), filed with the Department of Community & Economic Development. Restrictions typically include no employee meetings at the residence and no exterior signage.

   Official government source

   $25 flat application fee.·Not published - confirm current review times with the City of Green Bay Department of Community & Economic Development.

   $25 flat application fee.

   Not published - confirm current review times with the City of Green Bay Department of Community & Economic Development.

Official Sources

• Green Bay Business Licensing
• Wisconsin Environmental Quality — Water Programs
• EPA NPDES — Stormwater Discharges
• IRS EIN Application

Related Guides