Oakville has a strict 15 cm threshold that also covers hedges. Here's what homeowners and property owners need to know.
Since May 2, 2017, Oakville has required a permit to remove any private tree with a trunk diameter of 15 cm or more at breast height (DBH). This is one of the lowest thresholds in the GTA, tied with Mississauga.
What makes Oakville's bylaw unique is that it also covers hedges — if the stems of a hedge total 15 cm or more in diameter, a permit is required for removal. This catches many homeowners off guard.
The bylaw also applies to trees required to be retained or planted as a condition of an approved site plan. This means replacement trees planted under a previous permit are themselves protected.
Any healthy tree above 15 cm DBH removed from private property must be replaced. The specific number and type of replacement trees depends on the size of the tree being removed.
While not explicitly required for all applications, consulting an ISA certified arborist is strongly recommended to confirm permit necessity and support your application.
Apply to the Town of Oakville. Include your arborist's assessment and pay applicable fees. Dead, high-risk, ash, and buckthorn trees are fee-exempt.
An on-site visit is required as part of the review process. A town representative will assess the tree and your application.
Once approved, post the permit on your property for 5 days before starting removal. Then proceed with the work and plant any required replacement trees.
Yes, any tree or hedge with a diameter of 15 cm or more at breast height requires a permit. This has been in effect since May 2017.
Yes, hedges with stems totaling 15 cm or more in diameter are covered and require a permit for removal.
Once a permit is granted, it must be posted visibly on your property for 5 days before tree removal can begin.