Tree removal permit rules in Thornton, CO — sometimes called heritage tree, protected tree, or street tree ordinances — list which trees require a permit before you can cut them down.
Thornton regulates tree removal on private property through permits and size thresholds. Street trees are city-managed and cannot be removed by residents.
Thornton tree removal regulations protect the urban canopy by requiring permits for trees above a size threshold, typically 6 to 12 inches trunk diameter measured at breast height (4.5 feet). Applications may require an arborist report. Street trees in the right-of-way are managed exclusively by Thornton public works or urban forestry. Dead, dying, or hazardous trees may qualify for expedited removal. Replacement planting is usually required. Colorado state law may preempt local tree ordinances in certain circumstances.
Unauthorized removal: $500 to $10,000 per tree. Replacement planting required. Street tree damage: city restitution costs.
Thornton, CO
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Thornton, CO
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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 tree removal & heritage trees.
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