10 county-level rules, plus city-specific rules for 1 city in Douglas County, Colorado.
Verified from official government sources
In unincorporated Douglas County, RVs, boats and trailers can't sit on a public road longer than 72 hours within a seven-day period in designated urban areas. In Castle Rock, the same 72-hour cap applies on residential streets, and stored RVs must sit on an improved surface, not grass or dirt.
Castle Rock Municipal Code 10.16.010.B
It shall be unlawful for any person to park any recreational vehicle for a period of time longer than seventy-two (72) consecutive hours in any seven-day period on a public right-of-way adjacent to any property in any residentially-zoned area within the Town.
Castle Rock requires all vehicles, including boats, trailers and RVs, to be parked on a driveway, parking lot or other improved surface; parking on grass or dirt is not allowed. Douglas County zoning likewise requires paved surfacing for non-residential parking areas.
Castle Rock residential parking standards (property maintenance)
All vehicles including boats, trailers and recreational vehicles, must be parked on a driveway, parking lot or other improved surface. Parking on grass or dirt is not allowed.
Douglas County's 2025 traffic-and-parking ordinance restricts commercial vehicles parked on public roads across eight designated planning areas (including Highlands Ranch, Castle Pines, Pinery and Roxborough). Castle Rock separately bans heavy trucks and semitrailers on residential-area rights-of-way.
Castle Rock Municipal Code 10.16.010.A
It shall be unlawful for any person to park any truck with a gross vehicle weight of ten thousand (10,000) or more pounds, trailer, utility trailer, semitrailer, truck tractor, or farm tractor on a public right-of-way adjacent to any property in any residentially-zoned area within the Town.
Colorado sets no statewide ban on parking a passenger car on a public street, and Douglas County allows normal on-street parking. Castle Rock permits on-street parking as long as it is safely accommodated, but caps large vehicles and RVs on residential rights-of-way and lets neighborhoods request restrictions.
Town of Castle Rock On-Street Parking Policy
On-street parking along public streets is allowed as long as it is safely accommodated.
There is no blanket overnight parking ban in Douglas County or Castle Rock for passenger cars. The real limits are the 72-hour caps: RVs may not sit on a residential right-of-way longer than 72 consecutive hours, and a car left 48+ hours on county roads can be tagged as abandoned.
Castle Rock Municipal Code 10.16.010.B
It shall be unlawful for any person to park any recreational vehicle for a period of time longer than seventy-two (72) consecutive hours in any seven-day period on a public right-of-way adjacent to any property in any residentially-zoned area within the Town.
Douglas County sets no special residential EV-charging parking rule; installation follows the building/electrical permit and the county zoning code. Statewide, Colorado law (C.R.S. 38-33.3-106.8) bars HOAs, which govern much of Highlands Ranch, from unreasonably prohibiting a homeowner's EV charging system.
Under Colorado law, a motor vehicle left unattended on public property outside incorporated town limits for 48 hours or longer is an 'abandoned motor vehicle' and may be towed. Castle Rock also requires vehicles stored on private property to be licensed and operable.
C.R.S. 42-4-1802(1)(a)
"Abandoned motor vehicle" means: Any motor vehicle left unattended on public property, including any portion of a highway right-of-way, outside the limits of any incorporated town or city for a period of forty-eight hours or longer.
Colored curb markings (red, yellow, white) are official traffic-control devices installed by the town or county engineer, not something a resident may paint. Douglas County and its towns follow the federal MUTCD; a homeowner cannot paint a curb to reserve or restrict parking in front of their home.
Douglas County zoning requires commercial sites to provide off-street loading areas that stay out of fire lanes and setbacks, with no backing maneuvers allowed in the public right-of-way. In Castle Rock, active loading and unloading is the exception that lets otherwise-restricted vehicles briefly stop on a residential street.
Douglas County Zoning Resolution 2805.03
A loading area shall be provided in an amount necessary by the owner and shall not be used to supply off-street parking spaces. The loading area shall not occupy, nor intrude into, any fire lane and shall not be located in setback areas. No backing maneuvers shall be allowed in the public right-of-way.
Castle Rock bars parking any truck of 10,000 pounds gross vehicle weight or more, plus trailers, semitrailers, truck tractors and farm tractors, on a public right-of-way in residential areas. The rule exists to keep large vehicles off neighborhood streets.
Castle Rock Municipal Code 10.16.010.A
It shall be unlawful for any person to park any truck with a gross vehicle weight of ten thousand (10,000) or more pounds, trailer, utility trailer, semitrailer, truck tractor, or farm tractor on a public right-of-way adjacent to any property in any residentially-zoned area within the Town.
1 cities in Douglas County have their own parking rules rules. Each link goes to that city's dedicated page with code citations.
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