Oakville Tree Removal Permit: Rules, Fees & Arborist Reports

Oakville protects private trees 15 cm and larger, outside woodland

Oakville’s Private Tree Protection By-law 2017-038 protects all trees on private property with a diameter of 15 cm or more at breast height, outside woodland governed by the Halton Region Tree By-law. This is one of the lower thresholds in the GTA, so many young trees need a permit before removal.

The Private Tree Protection By-law

Oakville’s By-law 2017-038 applies to every tree on private property within the town’s boundaries that has a diameter of 15 cm or more at breast height, outside woodland governed by the Halton Region Tree By-law. There are no species exclusions and no exemption based on property size.

What Requires a Permit

• Removing any tree 15 cm+ DBH on private property outside woodland
• Injuring a tree: the bylaw’s definition includes cutting more than 25 percent of the canopy, and soil compaction, re-grading, or storing materials within the drip line

Fee Waivers

The town waives the application fee, but still requires an application, for:

• Dead trees (confirmed by the town or a certified arborist)
• High-risk trees
• Ash trees infested by emerald ash borer
• Buckthorn (an invasive species the town wants removed)

Each waiver needs approval from the town’s Designated Official. A smaller set of situations needs no permit at all, including emergency work on a tree at imminent risk of failure (the town must still be notified), pruning to clear utility lines or structures, and removals already required by a building permit or a Planning Act approval such as a site plan condition.

Heritage Properties and Trees

By-law 2017-038 sets up no heritage-tree registry. Heritage protection attaches to properties under the Ontario Heritage Act, and the tree bylaw builds on that (s.7(3)(a)): a permit application for a tree on a protected heritage property (designated under Part IV, inside a Part V heritage conservation district, or subject to a notice of intention to designate) needs a report from the Director of Planning Services confirming the removal is not likely to affect the property’s heritage attributes. If it is, the town must first consent to an alteration under the Act after consulting its Heritage Advisory Committee. Where the tree bylaw and heritage conservation conflict, the bylaw says heritage wins, subject only to health and safety.

How to Apply for a Tree Removal Permit

Step 1: Determine Your Situation

Check whether your tree is 15 cm or more in diameter at breast height and outside woodland. If yes, you need a permit. If the tree is dead, high-risk, EAB-infested ash, or buckthorn, the fee is waived and the process is simpler. For all other trees, you need to go through the full application process.

Step 2: Hire an ISA Certified Arborist

Oakville’s current application instructions specifically require an arborist report when removing a high-risk tree or when removal results from a development application, such as a pool, landscaping project, or other property construction. The report should cover:

• Tree species, size, and location
• Health and structural condition assessment
• The reason for the proposed removal
• Impact on neighbouring trees
• Recommended replanting

The arborist should address why the tree cannot be preserved through alternative measures such as pruning, cabling, or construction redesign.

Step 3: Submit Your Application

Applications go to the Town of Oakville’s Forestry section. You will need:

• A completed Private Tree Removal Permit application
• An arborist report (where required)
• A property survey or site plan showing tree locations
• The application fee ($65 for first tree 15-24cm, $425 for a second tree (15-24cm in 12 months) or a first tree over 24cm, $900 with a development application; waived for dead, high-risk, EAB-infested, and buckthorn trees)
• Photos of the tree

Step 4: Town Review

Oakville’s forestry staff review the application and an inspector contacts the applicant within 5 business days. The town will approve, deny, or approve with conditions.

Fees

Oakville’s fee structure depends on tree size and application type:

• First tree (15-24 cm) in a 12-month period: $65
• Second tree (15-24 cm in 12 months) or first tree over 24 cm, without a development application: $425
• Second tree (15-24 cm) or first tree over 24 cm, with a development application: $900
• When removal results from a development application, a development fee applies ($900 (Development-related permit, 2nd tree 15-24 cm or 1st tree over 24 cm))
• Dead, high-risk, EAB-infested, or buckthorn trees: fee waived

Permits are valid for a maximum of one year from issuance, and the permit must be posted visibly from the street at least five days before removal begins.

Replanting Requirements

Oakville sets replacement planting on a stepped scale in the bylaw’s Schedule A. A tree with a 30 cm diameter falls in the 25-34 cm band and requires 3 replacement trees. The scale tops out at 12 replacements for trees over 115 cm. A $300 refundable security deposit is required for each replacement tree, returned once a final inspection of the plantings is complete. Minimum replacement size is 30 mm caliper for deciduous trees or 150 cm height for coniferous.

The town encourages native species for replacements and can set species or sizes. Since the 2024 procedure update, cedar is off the replacement species list. Cash-in-lieu is accepted only where there is not enough space to replant on the property.

Penalties

Oakville enforces the bylaw on two tracks. Administrative penalty notices run $300 for a first contravention, $400 for a second of the same provision within 24 months, and $500 after that, as set in the town’s current rates and fees schedule. Court prosecution is the heavier track: fines range from $400 to $100,000 per offence, each tree removed can be charged as its own offence at $400 to $10,000 with no cap on the total, continuing violations accrue daily fines on the same scale, and a special fine can exceed $100,000 where the removal produced an economic gain. The court can also order replanting or payment of the trees’ amenity value.

In 2021 a developer was fined $50,000 plus the provincial victim surcharge for clear-cutting a Dundas Street West property, and in July 2026 a court ordered $822,000 in penalties over a Lakeshore Road East heritage property, including $72,000 specifically to rehabilitate the damage from the unpermitted removal of a mature tree.

Development-Related Tree Permits

For construction projects, the tree permit process is integrated with site plan approval. Builders must provide:

• A tree inventory for the entire property
• A tree preservation plan
• Details of tree protection measures during construction
• A replanting plan to replace removed trees

Oakville’s planning staff coordinate with the forestry section to review these plans. Tree protection fencing must be installed and inspected before site work begins.

Common Questions

When Oakville requires a permit

A permit is required for any tree with a trunk 15 cm or more at breast height, on private property in town outside woodland governed by the Halton Region Tree By-law. Dead, high-risk, EAB-infested ash, and buckthorn trees still go through an application, but the fee is waived.

What does the permit cost?

$65 for the first tree between 15 and 24 cm in a 12-month period, and $425 for a second tree (15 to 24 cm in 12 months) or a first tree over 24 cm. When the removal results from a development application, the fee for those trees is $900. No charge for dead, high-risk, EAB-infested, or buckthorn trees.

How long does the town take to respond?

An inspector contacts you within 5 business days of applying.

What happens if a tree comes down without one?

Administrative penalty notices run $300 to $500, and court prosecution carries fines of $400 to $100,000 per offence, with each tree chargeable separately. A 2021 clear-cutting case ended in a $50,000 fine.

Working with The Arborist Group

We prepare Oakville reports for homeowners and builders. Each report includes the detailed health assessment and preservation alternatives that Oakville’s forestry staff look for.