Local tree-rule guide
Dollard-des-Ormeaux tree rules
Dollard-des-Ormeaux tightly controls tree felling: trees over 10 cm are within the authorization system, but condition, ownership and replacement rules still matter.
The local rule
Dollard-des-Ormeaux requires a certificate of authorization before felling a regulated tree, and the City describes removal as a last resort.
The municipal page identifies trees greater than 10 cm in diameter within the authorization framework, but approval still depends on a qualifying reason rather than size alone.
Where space permits, replacement planting is required, with minimum replacement-tree dimensions published by the City.
A common or shared tree creates an additional consent problem: neighbouring owner authorization may be required before the municipal application can proceed.
Local exceptions and conditions
When removal can be authorized
- The City lists circumstances such as a dead tree, a tree that is unsafe and cannot reasonably be made safe through pruning or bracing, severe decline and conflicts with authorized construction.
- Structural weakness, serious damage or a transmissible disease can require an arborist report so the City has independent support for the proposed removal.
- Aesthetic preference is not treated as an adequate removal reason. The City also rejects ordinary inconveniences such as shade, falling leaves or fruit, surface roots, pollen and similar normal tree effects.
- That distinction matters when obtaining contractor quotes: the municipal file needs a recognized reason, not just a price to remove the tree.
Shared trees and ownership
- A trunk on or across a property boundary can engage both municipal approval and private ownership/consent issues.
- Dollard-des-Ormeaux’s material specifically addresses common trees and can require neighbour authorization or signature.
- Each affected owner should understand any replacement condition before the application is filed, rather than attempting to resolve consent after approval.
- If the location is uncertain, obtain a survey or other reliable boundary information; a fence line is not a dependable substitute for legal ownership.
Replacement after an approved removal
- Where planting space exists, the City requires replacement after an authorized removal rather than treating the permit as the end of the process.
- The published replacement standards include minimum dimensions for deciduous and coniferous trees and expect a tree capable of reaching a meaningful mature size.
- Plan the replacement location around buildings, utilities and future canopy space before the removal contractor arrives.
- Keep the authorization and proof of replanting until the file is complete in case the City needs to verify compliance.
Using the 10 cm figure carefully
- The 10 cm size reference is important, but it does not create an automatic right to remove a tree simply because the trunk meets that size.
- The City still evaluates whether the proposed felling fits an authorized reason and whether professional evidence or replacement is required.
- TreeRulesCanada therefore does not turn the 10 cm figure into a standalone permit verdict in the checker.
- Use the official authorization page below for the current application route and the arboriculture page for the City’s detailed criteria.
Before work starts
- Ownership: confirm whether the trunk is private, shared or on public land before authorizing work.
- Site context: check development approvals, environmental controls, easements and any prior tree-retention conditions that apply to this property.
- Work requirements: obtain the current permit, certificate, exemption or written municipal confirmation before the contractor starts.
- Keep the record: retain photos, measurements, professional reports and the municipal decision with the property file.
Official sources
Last verified: October 7, 2026. Rules, maps and application procedures can change; confirm with the local authority before work. How we research