California RV Laws: Registration, Licensing, and Towing

California RV laws cover registration, driver licensing, size and weight limits, insurance, towing, parking, and emissions, and the specific rules that apply to you depend on your RV’s weight, length, fuel type, and whether you tow anything behind it. Getting any piece wrong can mean fines, a registration hold, or an order to stop driving until you fix the problem.

Registering and Titling Your RV

Every motorhome and travel trailer operated or parked on California roads must be registered with the DMV. If you buy an RV in California or move into the state with one, you have 20 days to complete registration.1State of California Department of Motor Vehicles. Vehicle Registration Requirements – Section: Out-of-State Vehicles You’ll submit an Application for Title or Registration (Form REG 343), proof of ownership, and a smog or emissions certificate if applicable. Fees are based on the vehicle’s value, weight, and your county.

An RV bought out of state and brought into California triggers a use tax at the combined state and local sales tax rate for your county, which ranges from 7.25% up to 11.25% in the highest-tax jurisdictions.2California Department of Tax and Fee Administration. California City and County Sales and Use Tax Rates You may avoid the tax if you can show the RV was purchased for use outside California and not brought into the state during the first 12 months of ownership. The California Department of Tax and Fee Administration evaluates documentary evidence like out-of-state registration to support the exemption.3California Department of Tax and Fee Administration. 12 Month Test – Not Purchased for Use in California

A used RV bought privately needs the previous owner’s signed-over title, and a Bill of Sale (Form REG 135) is advisable to document the transaction. New RVs from a dealer come with a Manufacturer’s Statement of Origin and a dealer report of sale.4California Department of Motor Vehicles. Vehicle Industry Registration Procedures Manual – Recreational Vehicles Salvage or rebuilt RVs must pass a vehicle safety systems inspection before the DMV will issue a title,5Bureau of Automotive Repair. Safety Systems Inspections for Revived Salvage Vehicles and the California Highway Patrol can conduct unannounced salvage inspections at DMV offices and hold registration until an officer certifies the vehicle.6California Highway Patrol. Salvage Inspection Program

Which Driver’s License You Need

A standard Class C license covers most RV owners. The Vehicle Code calls a motorhome a “house car,” and you can drive one of any length on a Class C as long as it’s a single vehicle and you’re not towing something heavy. The license class questions really start when you tow.

  • Class C (standard): Motorhomes operated as a single unit, and towing a single trailer with a GVWR of 10,000 pounds or less.
  • Noncommercial Class B: A single vehicle over 26,000 pounds GVWR when not towing over 10,000 pounds. Some of the heaviest Class A diesel pushers cross this threshold.
  • Noncommercial Class A: Towing a trailer or fifth-wheel with a GVWR over 10,000 pounds, or towing more than one vehicle.7Caltrans. Vehicle Lengths – Section: Vehicle Combinations – Basic Law

Upgrading to a Class A or B noncommercial license means passing a written knowledge test and a behind-the-wheel driving test covering backing, turning, and vehicle control. Air brakes on the RV or tow vehicle add a separate knowledge and skills test.

Length and Weight Limits on the Road

California’s basic vehicle length limit is 40 feet. Motorhomes get an exception up to 45 feet, but anything longer than 40 feet faces route restrictions. Local authorities establish access routes for motorhomes in the 40 to 45 foot range, and you can apply for access to additional routes. A denial has to be based on a safety and engineering analysis, not preference.8Caltrans. 45′ Motorhomes – Overview A motorhome of 40 feet or shorter has no route restrictions. A motorhome towing a car or trailer can’t exceed 65 feet total.7Caltrans. Vehicle Lengths – Section: Vehicle Combinations – Basic Law

Weight limits follow federal bridge formula standards:

  • Single axle: 20,000 pounds maximum
  • Tandem axles: 34,000 pounds maximum
  • Gross vehicle weight: 80,000 pounds maximum for any combination9FHWA Operations – Department of Transportation. Bridge Formula Weights

The California Highway Patrol enforces these at weigh stations and roadside checks. An overweight RV can be ordered to offload cargo before continuing. Weight distribution matters just as much as total weight: exceeding axle limits reduces braking performance and increases the risk of tire blowouts. Verify loaded weights at a certified scale before a long trip, especially with a tow.

Towing Rules

California’s trailer brake threshold is stricter than most states. Any trailer coach or camp trailer with a gross weight of 1,500 pounds or more must have its own brakes on at least two wheels, independent of the tow vehicle.10California Legislative Information. California Code VEH Division 12 Chapter 3 Article 1 Section 26303 That’s half the 3,000-pound federal threshold, and out-of-state owners often discover it the hard way. Safety chains or cables are required as a backup connection on any towed unit.

Triple towing (pulling both a trailer and a vehicle behind your motorhome) is legal only for motor vehicles over 4,000 pounds unladen weight. Passenger vehicles can’t tow more than one unit regardless of their weight.11California Legislative Information. California Vehicle Code 21715 The total combination still can’t exceed 65 feet, and you need a noncommercial Class A license.

When towing, you stay in the right-hand lane or lanes designated for slower traffic. Where no lanes are designated, drive in the rightmost lane or as close to the right edge as practical.12California Legislative Information. California Vehicle Code VEH 21655 Extended side mirrors are required whenever towing.

Insurance Minimums

California requires liability insurance on every vehicle operated or parked on its roads, RVs included. The state’s minimums are:

Those numbers apply to any motor vehicle, and they’re low for what a 30,000-pound motorhome can do in a highway crash. Medical claims alone can blow past $60,000. Uninsured and underinsured motorist coverage fills the gap when the other driver can’t pay. Specialized RV policies add comprehensive and collision coverage for theft, vandalism, and accident damage. If your RV is your primary residence, full-time RV insurance is worth having because it includes personal liability for incidents at your campsite, similar to a homeowner’s policy. Any RV with an outstanding loan or lease will require full coverage until it’s paid off. A lapse in coverage can trigger registration suspension, fines, or impoundment.

Parking and Overnight Rules

Parking rules are set locally, and they vary sharply from city to city. Many cities prohibit oversized vehicles from parking on residential streets without a permit. San Diego, for instance, offers a Temporary Overnight Recreational Vehicle Permit that allows parking on your own block for up to three consecutive 24-hour periods at a time, with a maximum of 72 permit days per year.14City of San Diego Official Website. Temporary Overnight Recreational Vehicle Permit Other cities ban overnight RV parking in residential zones outright. Check your municipal code before assuming street parking is available.

Highway rest stops allow stays of up to eight hours in any 24-hour period, with no RV exception.15Cornell Law School. Cal. Code Regs. Tit. 21, 2205 – General Some retail parking lots tolerate overnight RV stays, but enforcement is up to the property owner. State and national parks have designated RV campgrounds that usually require reservations in peak season and enforce waste disposal rules.

Camping on Federal Land

Bureau of Land Management sites generally limit dispersed camping to 14 days within any 28-day period, after which you must relocate at least 25 to 30 miles away. Exact relocation distances vary by field office, so confirm with the local BLM office before an extended stay.16Bureau of Land Management. Camping on Public Lands BLM Long-Term Visitor Areas in the California desert allow camping for up to seven consecutive months with a seasonal permit.

National Forest rules can be tighter. The Angeles National Forest limits camping outside developed campgrounds to seven consecutive days per calendar year through December 2026, and camping within 300 feet of a road centerline is limited to three days per calendar year. Violations carry fines up to $5,000 for individuals or six months in jail.17U.S. Department of Agriculture Forest Service. Planning to Camp? Stay Limits and Dispersed Camping Restrictions Fire restrictions can change through the year and may close areas entirely during high-risk periods.

Emissions and Waste Rules

Diesel-powered motorhomes over 14,000 pounds GVWR must comply with CARB’s Clean Truck Check program, which requires annual emissions compliance testing and fees. Diesel motorhomes with engines from 2012 or earlier face a smoke opacity test and a visual inspection of emissions control equipment. Non-commercial motorhomes used only for recreation are not exempt.18California Air Resources Board. Clean Truck Check – Motorhome Fact Sheet Falling out of compliance triggers a DMV registration hold, which effectively makes the vehicle illegal to operate.

Dumping RV sewage or gray water anywhere other than a designated dump station or approved sewer connection violates California Penal Code 374.3, which carries fines up to $10,000 and jail time of up to six months. Many cities also restrict engine idling in residential areas.

Home Office Deduction for RV Living

If you use your RV as a home office, you may be able to deduct a portion of its expenses on federal taxes. IRS Form 8829 allows deductions for business use of your home, and the IRS treats an RV the same as any other dwelling for this purpose. The space has to be used exclusively and regularly for business and has to serve as your principal place of business, meaning you handle administrative tasks like billing, bookkeeping, and scheduling there and have no other fixed location where that work happens.19Internal Revenue Service. 2025 Instructions for Form 8829 – Expenses for Business Use of Your Home