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Adams County, CO Parking Rules: Commercial & Oversized Vehicles (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified July 2026

Key Facts

Lots under 1 acre
2 vehicles outdoors
Lots 1 acre or more
2 per acre, max 5
Surface
Asphalt or concrete required
Commercial ARP cap
16,000 lbs. GVW
Enforced by
Adams County Code Compliance

Summary

Unincorporated Adams County caps how many vehicles you may store outdoors by lot size: two total on lots under one acre, or two per acre up to a maximum of five on lots of one acre or more. Oversized units like motor homes, boats and fifth-wheels count, must sit on

City-specific rules exist: Thornton, and Westminster have their own commercial & oversized vehicles rules that differ from Adams County's county-level regulations. If you live in one of those cities, check the city-specific page instead.

On lots less than 1 acre, a total of two (2) vehicles, may be stored outdoors. On lots of 1 acre or more, a total of two (2) vehicles per acre, with a maximum of five (5) vehicles, may be stored outdoors.

Full Breakdown

The county's Vehicle Regulations (DSR 4-03-03-02-14) limit outdoor vehicle storage by lot size: on lots less than one acre, a total of two vehicles may be stored outdoors; on lots of one acre or more, two vehicles per acre may be stored, to a maximum of five. Oversized recreational units (motor homes, fifth-wheel trailers, campers, boats) count toward the limit and must sit on an approved asphalt or concrete surface, not in the back yard or landscaping. Oversized commercial vehicles are separately capped at 16,000 lbs. GVW for an accessory Administrative Review Permit; heavier trucks require a Special Use Permit and A-3 zoning.

Violations & Fines

Code Compliance abates over-count or improperly surfaced storage; exceeding the lot-size vehicle cap can trigger notices and required removal.

Frequently Asked Questions

How many RVs and boats can I store on my lot?
On lots under one acre, two vehicles total may be stored outdoors. On lots of one acre or more, two per acre up to a maximum of five, all on an approved hard surface.
Does a large motor home count toward the limit?
Yes. Motor homes, fifth-wheels, campers and boats are among the vehicles counted toward your outdoor storage limit and must sit on asphalt or concrete.

Sources & Official References

Other rules in Adams County

All Adams County rules

Compare Adams County to another location·View the Colorado parking rules overview

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