Thornton permits limited home cannabis cultivation for personal use under state law. Plant counts, grow area, and visibility restrictions apply. Local ordinances may add further limits.
Thornton allows adults 21 and over to grow a limited number of cannabis plants at home under state law. Typically 6 plants per household or fewer depending on local rules. Plants must be in a locked, enclosed area not visible from public spaces. Odor control may be required. Landlords may prohibit growing in rental properties. Local jurisdictions may impose stricter limits than state law. Growing for sale requires a commercial license.
Exceeding plant limits: warning, then fines $100 to $500. Visible grows: citation. Growing for unlicensed sale: criminal charges.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
Thornton, CO
Thornton prohibits storing abandoned, inoperable, or unregistered vehicles on public streets or visible on private property. Vehicles may be tagged and towed...
Thornton, CO
Thornton regulates electric vehicle charging infrastructure for residential and commercial properties. Building codes may require EV-ready parking in new con...
Thornton, CO
Thornton regulates overnight parking on public streets. Many areas restrict parking between certain hours or require permits for overnight street parking.
Thornton, CO
Thornton requires pool barriers meeting safety codes to prevent drowning. Fences must be at least 4 to 5 feet tall with self-closing, self-latching gates.
Thornton, CO
Thornton requires permits for retaining walls above a certain height, typically 4 feet. Engineering review may be required for taller walls.
Thornton, CO
Thornton restricts or prohibits intentional feeding of wildlife including deer, coyotes, and bears. Feeding wildlife creates public safety hazards and nuisan...
Side-by-side rule comparisons with other cities in Adams County.
See how other cities in Adams County handle home cultivation.
See how Thornton's home cultivation rules stack up against other locations.
Quick Compare
Help us keep this page accurate. If you notice an error or outdated information, let us know.