9 county-level rules, plus city-specific rules for 2 cities in Adams County, Colorado.
Verified from official government sources
Unincorporated Adams County Code Compliance treats tall, overgrown grass, weeds, and brush of about 12 inches as environmental blight subject to abatement. Inside Commerce City, Thornton, Brighton, and other incorporated cities, the city's own weed ordinance controls.
Adams County Code Compliance — Environmental Blight
Tall, overgrown grass, weeds and brush (12 inches).
Adams County has no countywide ordinance requiring a permit to trim trees on your own private property in unincorporated areas. Standard Colorado neighbor law lets you trim branches overhanging your side to the property line. Trees in the public right-of-way are the exception.
Adams County does not require a general permit to remove a healthy tree from your own private, unincorporated residential lot. The county's tree rules apply to development sites, landscape/buffer plantings, and trees in the public right-of-way, not to routine homeowner tree removal.
Under the Colorado Noxious Weed Act, every landowner in Adams County must manage designated noxious weeds. The county's 1997 Noxious Weed Enforcement Policy requires all owners in unincorporated Adams County to control listed weeds such as Canada thistle, leafy spurge, field bindweed, and purple loosestrife.
There is no single county watering rule; limits are set by your water provider. In the South Adams County Water and Sanitation District (Commerce City and vicinity), irrigation is barred between 10 a.m. and 6 p.m., with assigned days based on your address. Denver Water customers face separate drought-stage rules.
South Adams County Water & Sanitation District — Irrigation Rules
Irrigation shall not occur between the hours of 10 a.m. and 6 p.m. Watering days based on even/odd last number of street address.
Colorado law lets Adams County residents collect rooftop rainwater in up to two rain barrels with a combined capacity of 110 gallons. It is limited to single-family and small multi-family homes (four units or fewer), and the water may only be used outdoors on the same property.
Adams County does not prohibit or mandate native plants for private residential yards. County landscape standards encourage preserving existing valuable vegetation on development sites and Colorado law protects xeriscaping, so homeowners are free to plant drought-tolerant and native species.
Adams County has no countywide ordinance banning or specifically regulating artificial turf on private residential yards in unincorporated areas. Homeowners may install synthetic grass, though it must be kept maintained. Check your city and HOA, which may impose design or coverage rules.
Adams County does not prohibit residential backyard composting. There is no county permit for a home compost pile in unincorporated areas, but a poorly kept pile that draws pests or emits odor can be cited as blight or a nuisance under code compliance.
2 cities in Adams County have their own landscaping rules rules. Each link goes to that city's dedicated page with code citations.
See every category we cover for Adams County — parking, noise, fences, fires, animals, pools, and more.
Adams County Ordinance Hub →