Longmont, CO Landscaping Rules: Weed Ordinances (2026)
Key Facts
- Height limit
- 12 inches
- Notice to cure
- 10 days
- First fine range
- $50–$500
- Repeat offense minimum
- $100, not suspendable
- City cleanup surcharge
- 20% of removal cost
Summary
Longmont bans weeds and unsightly vegetation over 12 inches tall on any lot, including the strip abutting the public right-of-way, and treats noxious weeds as a public nuisance.
It is unlawful for any person owning or having possession of any land, including any abutting the public right-of-way, to permit any weeds, grasses or other unsightly vegetation to grow in height exceeding 12 inches or to otherwise become a nuisance. For purposes of this section, the term "public right-of-way" means and includes the nontraveled portion of any street or alley. The following are exempt from the height limitation of this subsection: vegetation intended to enhance the natural settings on city golf courses, primary greenways, trails, and parks; and production crops on agricultural properties. (Code 1993, § 9.32.010; Code 2009, § 9.32.010; Ord. No. O-92-27, § 1; Ord. No. O-2005-91, § 1)
Full Breakdown
Under Longmont Municipal Code Chapter 9.32, any weeds, grasses, or other unsightly vegetation exceeding 12 inches in height on private property or the adjoining public right-of-way is a public nuisance the owner or occupant must remove. Type A, B, or C noxious weeds under the Colorado Noxious Weed Act are nuisances regardless of height. City golf course, greenway, trail, and park landscaping and agricultural production crops are exempt from the height limit. Violators get a written notice requiring cleanup within 10 days, with a right to request a hearing before the city removes the weeds itself and bills the owner.
Violations & Fines
Municipal court fines run $50 to $500 per Sec. 9.32.060; a second conviction within 12 months carries a mandatory, non-suspendable minimum $100 fine. The city may also enter and remove weeds itself, charging costs plus a 20% administrative fee as a property lien.
Frequently Asked Questions
How tall can weeds get before Longmont cites me?
What happens if I ignore the notice?
Sources & Official References
Other rules in Longmont
How Longmont compares: Cities with the Strictest Weed and Property Maintenance Rules·Compare Longmont to another location·View the Colorado landscaping rules overview
See something wrong?
Help us keep this page accurate. If you notice an error or outdated information, let us know.
Weed Ordinances in Nearby Cities
How other cities in Boulder County handle weed ordinances.