Mobile Car Wash Permit Requirements in Silver Spring, MD

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. Maryland Business Registration

   Register with SDAT via Maryland Business Express (LLC Articles of Organization $100; trade name $25, filed with SDAT — not a county clerk). All Maryland LLCs/corporations must also file the SDAT Annual Report each year ($300, due April 15).

   Official government source

   $100 LLC filing; $25 trade name; + $300/year SDAT Annual Report·1–7 business days

   $100 LLC filing; $25 trade name; + $300/year SDAT Annual Report

   1–7 business days

2. Maryland Environmental / Stormwater Compliance

   Mobile car wash operations generate wastewater containing detergents, oils, and grime. Maryland regulations, consistent with the federal Clean Water Act, prohibit discharging wash water to storm drains, gutters, or waterways. Use a containment mat and recovery system or direct wash water to a sanitary sewer. Contact the Maryland Department of the Environment (MDE) Water and Science Administration for compliance and any required discharge permits.

   Official government source

   Free–$200 (registration or permit fee, if required)·1–4 weeks (if permit required; otherwise immediate with self-compliance)

   Free–$200 (registration or permit fee, if required)

   1–4 weeks (if permit required; otherwise immediate with self-compliance)

3. Maryland Sales Tax Registration

   Car washing and auto detailing services are not subject to Maryland sales tax. If you sell tangible products (air fresheners, detailing products), register with the Comptroller of Maryland (free) and collect the 6% state sales tax on those goods only. Maryland has no local sales taxes.

   Official government source

   Free–$25·Immediate–1 week (online)

   Free–$25

   Immediate–1 week (online)

1. Silver Spring General Business License

   All mobile car wash and auto detailing businesses operating in Silver Spring must obtain a general business license from the city. Mobile operations that travel to customers throughout the city are covered by a single city license. The application requires your business entity information, contact details, and a description of services. Renewed annually.

   Official government source

   $30–$125/year·1–2 weeks

   $30–$125/year

   1–2 weeks

2. Silver Spring Stormwater / Wastewater Discharge Compliance

   Silver Spring prohibits the discharge of mobile car wash wastewater into storm drains, gutters, or waterways. Wash water contains detergents, oils, and road grime that are harmful to local waterways. Operators must: (1) use a portable containment berm or mat to capture runoff, (2) vacuum up wash water with a wet/dry vac or pump, and (3) dispose of collected water at an approved sanitary sewer access point or licensed disposal facility. The city's Public Works or Stormwater division may conduct inspections. Violations may result in fines.

   Official government source

   $0–$150 (inspection or registration fee, if required)·1–3 weeks (self-certify compliance before operating)

   $0–$150 (inspection or registration fee, if required)

   1–3 weeks (self-certify compliance before operating)

3. Montgomery County Environmental Health — Chemical Use Registration (if applicable)

   Mobile detailing operations in Montgomery County that use chemical cleaning agents, engine degreasers, or solvents beyond standard car wash soap may need to register with the county Environmental Health department. Businesses using hazardous materials must maintain a Safety Data Sheet (SDS) for each chemical and comply with proper storage and disposal requirements.

   $0–$100 (registration fee, if required)·1–2 weeks

   $0–$100 (registration fee, if required)

   1–2 weeks

4. Silver Spring Home Occupation Permit (if operating from residence)

   Mobile car wash operators who store their vehicle, equipment, and supplies at a residential address in Silver Spring may need a Home Occupation Permit from the city. Restrictions typically include: no employee meetings at the residence, no exterior signage, and no large-scale storage of chemicals that would require hazmat permits.

   Official government source

   $0–$75·1–3 weeks

   $0–$75

   1–3 weeks

Official Sources

• Silver Spring Business Licensing
• Maryland Environmental Quality — Water Programs
• EPA NPDES — Stormwater Discharges
• IRS EIN Application

Related Guides