Arborist Report Caledon: Tree Permit Requirements & 2-Day Turnaround

Understanding Caledon’s Tree Protection

Caledon’s Tree Preservation By-law 2025-101 took effect January 1, 2026, replacing what had been, for most of the town, no private tree protection at all. It protects any tree 30 cm or larger in diameter at breast height on private property. A separate, older bylaw covers woodlands.

Because the bylaw is new, plenty of Caledon homeowners and builders are still catching up to the fact that a permit is now required before removing a mature tree. The town’s estate lots and rural properties tend to carry more large trees than the GTA average, which means the threshold catches a lot of ground here.

The Tree Preservation By-law

By-law 2025-101 applies to every tree 30 cm DBH or larger on private property across Caledon. Trees under that threshold are not regulated. A separate Woodland Conservation By-law (2000-100) applies to qualifying wooded areas regardless of individual tree size.

What Requires a Permit

• Removing any tree 30 cm+ DBH on private property
• Injuring a tree in a way likely to cause its decline or death
• Any construction or grading activity within the tree protection zone of a protected tree

Exemptions

• Trees under 30 cm DBH
• Dead, dying, or poor-condition trees, except within residential lot environmental easements
• Removals authorized separately under the Woodland Conservation By-law process

Invasive species are not exempt from the permit requirement or from compensation ratios under this bylaw, unlike in some neighbouring municipalities.

Niagara Escarpment Overlap

A meaningful share of Caledon sits within the Niagara Escarpment Plan area. Properties there may need Niagara Escarpment Commission approval in addition to the Town’s tree permit, and the two processes don’t automatically run in sequence. Confirm Escarpment status before finalizing a removal plan; missing the NEC step is the single most common way a Caledon permit gets delayed.

How to Apply for a Tree Removal Permit

Step 1: Confirm the Diameter and Check for Overlap

Measure the tree at 1.4 m above grade. If it’s 30 cm or larger, a permit applies. Then check whether the property falls within the Niagara Escarpment Plan area or a mapped woodland, since either adds a second approval track.

Step 2: Hire an ISA Certified Arborist

Caledon’s application requires documentation of the tree and the reasons for removal. The report should cover species, condition, diameter, the case for removal, and (per the town’s drawing specifications) a plan overlaid on a current property survey showing tree locations, canopies, and any protection fencing.

Step 3: Submit Your Application

Applications go through the Town’s online form. There is no application fee as of 2026. Include the arborist’s documentation and, where applicable, evidence of Niagara Escarpment Commission approval.

Step 4: Town Review

Natural Heritage staff review the submission. The Town has not published a standard turnaround time; budget extra runway if the Escarpment or a woodland designation is involved.

Replacement Requirements

Caledon uses a DBH-tiered lookup table rather than a flat ratio: a tree of 10 to 20 cm removed requires 1 replacement, 21 to 35 cm requires 2, 36 to 50 cm requires 3, 51 to 65 cm requires 4, and anything over 65 cm requires 5. Compensation trees must meet or exceed the Town’s standard planting specifications. Where on-site planting isn’t feasible, cash-in-lieu is available at a rate the Town sets.

Penalties

Contraventions carry a minimum fine of $500. As with most Ontario tree bylaws, the Town can also require replanting on top of any fine, and repeat or large-scale violations tend to draw closer scrutiny on future applications from the same property.

Working with The Arborist Group

Because Caledon’s bylaw is new, we spend the first part of every engagement here confirming exactly which rules apply: the base 30 cm threshold, the Woodland Conservation By-law, and Niagara Escarpment Commission jurisdiction where relevant. We prepare the documentation the Town’s application requires and sequence any Escarpment approval alongside it, so a project doesn’t stall waiting on a second agency partway through.