Mobile Car Wash Permit Requirements in Denver, CO

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. Colorado Secretary of State Business Registration

   Mobile car wash and detailing businesses must register with the Colorado Secretary of State if formed as an LLC, corporation or partnership. A sole proprietor operating under a name other than the owner's own must file a Statutory Trade Name statement — filed online with the Secretary of State, since Colorado has no county-level DBA filing. Registered entities must also file a Periodic Report each year.

   Official government source

   $50 Articles of Organization (LLC) or Articles of Incorporation; $20 Trade Name Statement; $25 annual Periodic Report·Filed online and processed immediately; paper filings are not accepted for most documents

   $50 Articles of Organization (LLC) or Articles of Incorporation; $20 Trade Name Statement; $25 annual Periodic Report

   Filed online and processed immediately; paper filings are not accepted for most documents

2. Colorado Stormwater Compliance (CDPHE Water Quality Control Division)

   Mobile car wash operations generate wastewater containing detergents, surfactants, oils and road grime. Colorado water quality regulations, consistent with Clean Water Act requirements, prohibit discharging this wash water to storm drains, street gutters or waterways. Operators must contain wash water with a berm or mat and recover it with a wet/dry vacuum or pump, or direct it to a sanitary sewer inlet. The regulator is the Colorado Department of Public Health & Environment (CDPHE), Water Quality Control Division — there is no 'Colorado Department of Environmental Quality'. Discharge permits under CDPS apply to industrial and construction dischargers, not to a mobile washer that contains and properly disposes of its water.

   Official government source

   $0 — CDPHE has no registration or permit for mobile car washing. Compliance costs are equipment (containment mat, berm, wet/dry vacuum) and proper disposal, not a government fee.·No application or waiting period; the obligation is an ongoing operating requirement from day one.

   $0 — CDPHE has no registration or permit for mobile car washing. Compliance costs are equipment (containment mat, berm, wet/dry vacuum) and proper disposal, not a government fee.

   No application or waiting period; the obligation is an ongoing operating requirement from day one.

3. Colorado Sales Tax License (if selling taxable goods)

   Colorado does not tax services (§39-26-102(15)(a)(I) C.R.S.), so car washing and detailing labour is not subject to state sales tax. A sales tax license is required only if the business sells taxable tangible goods such as retail car-care products. Register with the Colorado Department of Revenue; home-rule cities such as Denver license and tax separately.

   Official government source

   $16 for the two-year license period when applying January–June of an even year, prorated to $12, $8 or $4 later in the cycle, plus a one-time refundable $50 deposit for a new account ($66 total for a first location); the deposit is refunded once $50 in state sales tax has been remitted — no license is needed if you sell only detailing services·Immediate when filed online through MyBizColorado or Revenue Online

   $16 for the two-year license period when applying January–June of an even year, prorated to $12, $8 or $4 later in the cycle, plus a one-time refundable $50 deposit for a new account ($66 total for a first location); the deposit is refunded once $50 in state sales tax has been remitted — no license is needed if you sell only detailing services

   Immediate when filed online through MyBizColorado or Revenue Online

1. Denver — No General Business License Required

   Denver does not issue a general or blanket business license. Its Department of Licensing and Consumer Protection (formerly the Department of Excise and Licenses) publishes a License Directory of exactly 68 category-specific licenses (body art establishment, massage business, retail food, kennel, short-term rental, alarm business and similar). Mobile car wash and auto detailing is not among them, so no Denver business license applies. A mobile detailer that sells taxable products must register for Denver's Retailer's Sales, Use and Lodger's Tax License, which Denver issues at no charge.

   Official government source

   $0 — no Denver business license exists for mobile car wash or detailing·Not applicable

   $0 — no Denver business license exists for mobile car wash or detailing

   Not applicable

2. Denver Stormwater Discharge Compliance (no permit required)

   Denver prohibits discharging wastewater — including mobile car wash runoff carrying detergents, oils and road grime — into storm drains, gutters or waterways. Compliance means containing the wash water with a portable berm or mat, recovering it with a wet/dry vacuum or pump, and disposing of it at an approved sanitary sewer connection. There is no Denver mobile car wash permit or stormwater discharge registration: Denver's Department of Licensing and Consumer Protection publishes a License Directory of exactly 68 licence categories and none covers mobile car washing or wash-water discharge. Denver Public Health & Environment handles environmental health citywide and the Department of Transportation & Infrastructure runs the storm drainage system; enforcement is by complaint and violation, not by permit.

   Official government source

   $0 — no Denver permit, registration or inspection fee exists for mobile car washing. Costs are containment and disposal equipment, plus fines if wash water reaches a storm drain.·No application or waiting period; the requirement applies from the first job, so there is nothing to 'self-certify' in advance.

   $0 — no Denver permit, registration or inspection fee exists for mobile car washing. Costs are containment and disposal equipment, plus fines if wash water reaches a storm drain.

   No application or waiting period; the requirement applies from the first job, so there is nothing to 'self-certify' in advance.

3. Denver Fire Department — Hazmat / Flammable Liquids Operational Permit (only if thresholds are met)

   Denver is a consolidated city and county with no separate 'county' environmental health agency — Denver Public Health & Environment (DDPHE) handles environmental health citywide — and there is no chemical-use registration programme for small operations such as mobile detailing. Where quantities of hazardous materials or flammable liquids reach the thresholds in Denver Fire's permit table, a Hazmat or Flammable and Combustible Liquids operational permit is required instead, applied for through E-Permits (Accela Citizen Access) and renewed annually. Maintain Safety Data Sheets and follow proper storage and disposal practices regardless.

   Official government source

   $0 — no DDPHE chemical-use registration exists. A DFD Hazmat or Flammable and Combustible Liquids operational permit, if quantities reach permit thresholds, is priced from DFD's quantity table (most flat-rate DFD operational permits run $65–$315 a year).·Not applicable unless a DFD permit threshold is met; DFD reviews applications in the order received and issues the permit once fees are paid.

   $0 — no DDPHE chemical-use registration exists. A DFD Hazmat or Flammable and Combustible Liquids operational permit, if quantities reach permit thresholds, is priced from DFD's quantity table (most flat-rate DFD operational permits run $65–$315 a year).

   Not applicable unless a DFD permit threshold is met; DFD reviews applications in the order received and issues the permit once fees are paid.

4. Denver Zoning — Home Occupation Review (if operating from a residence)

   Mobile car wash operators who store the vehicle, equipment and supplies at a Denver residence are running a home occupation, an accessory use regulated under Article 11 of the Denver Zoning Code and reviewed by Community Planning and Development. Typical limits include no non-resident employees working at the home, no exterior signage or outdoor display, limits on customer and delivery traffic, and no storage of hazardous materials that would require separate permitting.

   Official government source

   Denver quotes the zoning review fee through its e-permits system; the amount depends on the type of review required·Confirm zoning before you begin operating; CPD reviews are submitted and tracked through e-permits

   Denver quotes the zoning review fee through its e-permits system; the amount depends on the type of review required

   Confirm zoning before you begin operating; CPD reviews are submitted and tracked through e-permits

Official Sources

• Denver Business Licensing
• Colorado Environmental Quality — Water Programs
• EPA NPDES — Stormwater Discharges
• IRS EIN Application

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