Tree replacement requirements in Colorado
Mitigation obligations across 13 verified Colorado cities, ranked ascending by replacement ratio. Numbers come directly from each city's published ordinance — heritage and specimen trees typically carry higher ratios than standard protected trees.
Replacement obligation comparison
Sorted ascending by minimum n:1 ratio. Cities with text-only or retention-percentage rules appear last. Click a city for the full ordinance page or the ordinance link for the underlying municipal code.
| City | Replacement ratio | Replacement details | In-lieu fee/tree | Processing | Code |
|---|---|---|---|---|---|
| Denver |
1:1
1:1 to 2:1 for street tree removal; on-site landscape replacement for development |
Replacement required on-site or in nearby right-of-way; in-lieu fees to Tree Planting Fund when infeasible. | — | 2-4 weeks | Ordinance |
| Aurora |
1:1
1:1 to 2:1 mitigation based on tree size and condition |
On-site replacement preferred; fee-in-lieu to tree mitigation fund when infeasible. | — | 3-6 weeks | Ordinance |
| Boulder | Based on tree category and site-specific review | Replacement required to maintain canopy coverage; in-lieu fees available. | — | — | Ordinance |
| Arvada | Based on tree size and condition (typically 1:1 to 2:1) | On-site replacement preferred; fee-in-lieu when infeasible. | — | 3-6 weeks | Ordinance |
| Centennial | Based on tree size and condition (typically 1:1 to 2:1) | On-site replacement preferred; fee-in-lieu when infeasible. | — | 3-6 weeks | Ordinance |
| Golden | Based on tree size and condition (typically 1:1 to 2:1) | On-site replacement preferred; fee-in-lieu when infeasible. | — | 3-6 weeks | Ordinance |
| Greeley | Based on tree size and condition (typically 1:1 to 2:1) | On-site replacement preferred; fee-in-lieu when infeasible. | — | 3-6 weeks | Ordinance |
| Lakewood | Based on tree size and condition (typically 1:1 to 2:1) | On-site replacement preferred; fee-in-lieu to tree fund when infeasible. | — | 3-6 weeks | Ordinance |
| Longmont | Based on tree size and condition (typically 1:1 to 2:1) | On-site replacement preferred; fee-in-lieu to tree fund when infeasible. | — | 3-6 weeks | Ordinance |
| Loveland | Based on tree size and condition (typically 1:1 to 2:1) | On-site replacement preferred; fee-in-lieu when infeasible. | — | 3-6 weeks | Ordinance |
| Thornton | Based on tree size and condition (typically 1:1 to 2:1) | On-site replacement preferred; fee-in-lieu when infeasible. | — | 3-6 weeks | Ordinance |
| Westminster | Based on tree size and condition (typically 1:1 to 2:1) | On-site replacement preferred; fee-in-lieu when infeasible. | — | 3-6 weeks | Ordinance |
| Fort Collins | Mitigation based on condition rating and size (typically 1:1 to 2:1) | On-site replacement preferred; payment to tree mitigation fund when infeasible. | — | 3-6 weeks | Ordinance |
How Colorado replacement obligations work
- Which city requires the highest replacement ratio in Colorado?
- Denver, Colorado carries the highest verified replacement ratio in Colorado at 1:1 (per its ordinance: "1:1 to 2:1 for street tree removal; on-site landscape replacement for development"). Across 2 verified cities with numeric ratios, the median is 1:1 and the lowest is 1:1.
- What's the typical replacement obligation when a tree is removed?
- Most cities in Colorado require 1:1 replacement at minimum, with heritage or specimen trees typically carrying enhanced ratios (often 2:1 or 3:1). Median replacement ratio across 2 verified cities is 1:1. Many ordinances also accept an in-lieu fee per tree when on-site replanting isn't feasible.
- Can I pay an in-lieu fee instead of replanting trees in Colorado?
- Most cities in Colorado accept in-lieu mitigation deposits to a tree planting fund when on-site replanting isn't feasible, but the per-tree dollar amount isn't published as a flat fee — it's calculated case-by-case (often based on caliper inches or assessed value). Verify with the municipal forester.
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