In unincorporated Boulder County, properties 2.5 acres or smaller must keep grasses, shrubs and brush cut to less than 9 inches. Larger rural acreage is exempt but must still control noxious weeds.
Boulder County Community Planning & Permitting enforces yard maintenance on smaller lots. Properties 2.5 acres or smaller are expected to be maintained in harmony with neighborhood aesthetics, which the county interprets as keeping grasses, shrubs and brush under 9 inches tall. This does not apply to large agricultural or foothill parcels, where natural grasses, native meadows and pasture are normal and encouraged. On any parcel size, listed noxious weeds must still be managed regardless of height. Inside the incorporated cities (Boulder, Longmont, Louisville, Lafayette) the municipal weed/tall-grass code governs, not the county.
Complaint-driven. Code enforcement investigates and issues a notice with a correction deadline; unabated violations can lead to abatement and Land Use Code penalties.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
Boulder County, CO
Boulder County has no separate 'hoarding' ordinance, but Ordinance 2022-8 makes it unlawful to fail to provide any livestock or domestic animal with minimum ...
Boulder County, CO
Boulder County residents may not intentionally feed big game or bears. Colorado Parks and Wildlife regulation and C.R.S. 33-6-131 make it illegal to intentio...
Boulder County, CO
Boulder County Parks & Open Space areas are open for daytime use only, between sunrise and sunset, except certain named trail corridors and connecting spurs ...
Boulder County, CO
Boulder County's Land Use Code (Article 7-1600) requires all outdoor light fixtures to be located, aimed, or shielded to minimize stray light trespassing acr...
Boulder County, CO
Boulder County has strong dark-sky lighting rules in Article 7-1600 of the Land Use Code. All outdoor lighting on new or permitted development must be fully ...
Boulder County, CO
Boulder County's Land Use Code (Article 13) does not exempt garage-sale signs generally; temporary signs must meet the zoning district's size and setback rul...
See how Boulder County's grass height limits rules stack up against other locations.
Help us keep this page accurate. If you notice an error or outdated information, let us know.