Tree Removal Permit Toronto, Mississauga, and Oakville: 2026 Rules

Before you book a tree removal, the homeowner question is always the same: do I need a permit? In Toronto, Mississauga, and Oakville the answer depends on three things. Where the tree is. How thick the trunk is at chest height. And whether the city has carved out an exemption for dead, hazardous, or specific species. Get a tree removal permit Toronto wrong, and you can be looking at fines that dwarf the cost of the removal itself.

This is the bylaw plain-English version, by city, from a working arborist who files these applications regularly. Skim to your city, check the threshold, then call us if you want the report and application handled in one visit.

Why permits exist and why every homeowner asks this first

Toronto, Mississauga, and Oakville all protect mature trees on private property through a bylaw. A tree above a certain trunk size cannot be removed without a permit, even if it sits on your own lawn. The cities care about the urban canopy, drainage, and shade, not about who holds the deed.

Two questions tell you whether you need to apply. Is the tree on your land or on the boulevard or in a park? Boulevard and park trees are city-owned. Call 311. We do not remove city trees.

Is the trunk thicker than the city's threshold? That measurement, called DBH (diameter at breast height), is taken at 1.4 metres above grade. We cover how to measure it in section 5. Under the threshold, no permit is needed. At or above, you need one before a saw touches the bark.

Worth knowing before you call us: fines for cutting a regulated tree without a permit run from a few thousand dollars per tree in Mississauga and Oakville up to $100,000 maximum per offence in Toronto. Cities investigate when neighbours report sudden stump appearances. A tree removal permit Toronto application costs a fraction of what a no-permit fine costs.

Toronto: 30 cm DBH and the private-tree path

Toronto's private tree bylaw kicks in at 30 cm DBH, measured at 1.4 m above grade. Anything thicker than that on your private property requires a permit before removal. Anything under that, you can remove without applying. Multi-stemmed trees use a special rule: if any one stem is 30 cm DBH, or the sum of the stems (each measured) is over 30 cm, the bylaw applies.

Apply to Urban Forestry through the city's e-permit portal or by paper application at a city office. The application asks for tree species, DBH, reason for removal (dead, hazardous, construction, owner preference), and a site plan or photo. You will also be asked about your replanting plan.

Fees and timing as of 2026: the standard private-tree permit fee is $137.50 per tree. Add an inspection fee if Urban Forestry sends someone out. Decisions typically come back in 10 to 14 business days, longer in spring when applications spike. Approved permits include a replanting condition: usually one or more trees of a comparable species, planted on the same property within a season.

If the tree is dead or imminently hazardous, you can flag it as such in the application and the city may inspect on a faster timeline. Do not start cutting before the inspector arrives. We have seen Toronto homeowners get hit with stop-work orders mid-removal because they assumed dead meant exempt.

Mississauga: 15 to 30 cm is the band that catches people off guard

Mississauga uses a banded threshold, which is what trips people up. Trees with a DBH between 15 cm and 30 cm may need a permit depending on the property's tree-protection designation. Trees at 30 cm DBH or more almost always need one. Below 15 cm, no permit. Homeowners moving from Toronto to Mississauga assume the threshold matches. It does not.

Apply through the city's Forestry section via the Mississauga.ca permits portal. Documents required are similar to Toronto: tree count, species, DBH, condition, and a replacement planting commitment. Mississauga is firm about replanting. Default replacement ratio is one-for-one but increases for larger or heritage trees.

Fees vary by size and tree count. Single small-band permits start in the low three figures. Multi-tree or large-DBH applications run into the high hundreds. Wait times are similar to Toronto: 2 to 3 weeks normally, longer in March, April, and May when storm and renovation work backs up the queue.

Mississauga forestry inspectors are thorough. If the application says the tree is dead, they will come check. If it is alive and the removal is for a renovation or pool install, they weigh canopy loss against the replanting plan before approving.

Oakville: 76 cm circumference and what that actually translates to

Oakville's threshold is written in circumference, not diameter. A trunk circumference of 76 cm or more, measured at 1.4 m above grade, falls under the private tree bylaw. That works out to roughly 24.2 cm DBH, meaningfully smaller than Toronto's 30 cm threshold. More Oakville trees fall under the bylaw than homeowners expect.

Apply through the town's Forestry division. The form asks for species, circumference (or DBH), property location, condition, and reason for removal. Oakville requires an arborist report for any healthy or borderline tree. For a clearly dead tree with photos, the report is sometimes waived at the town's discretion.

Watch for Heritage Tree designation. Oakville maintains a separate registry of trees deemed heritage-worthy by size, species, or historical association. A heritage tree is essentially un-removable except in extreme cases. Before booking a removal in Oakville, check whether your tree is on the registry. We run that check on the first site visit.

Fees sit in the same range as Mississauga. Non-emergency wait times run 2 to 4 weeks. The town's replanting policy is more demanding than Toronto's: replacements are typically larger caliper trees and the town audits compliance the following season.

How to measure DBH on your own tree before you call

Knowing your DBH before you call any tree service saves a phone call. You can do this yourself with a fabric tape measure and 30 seconds.

Step 1. Find 1.4 metres above the ground. If you do not have a measuring tape long enough, mark that height on a stake or a yardstick and lean it against the trunk.

Step 2. Wrap a fabric tape around the trunk at that 1.4 m mark, snug but not tight. Read the number in centimetres. That is the circumference.

Step 3. Divide the circumference by 3.14 (pi). That gives you the DBH in centimetres. Example: a trunk with a 100 cm circumference has a DBH of about 32 cm, which means it is over Toronto's threshold and the regulated band in Mississauga, and well over Oakville's threshold.

If the trunk is irregular or has a fork below 1.4 m, the measurement gets tricky. Below the fork, measure once. Above the fork, the cities treat each stem separately and may sum them. If you are not sure, send us a photo with a tape measure in frame and we will tell you whether it triggers the bylaw before you spend money on an application.

Dead trees, hazardous trees, and species exemptions

Every city we work in has carve-outs for dead and dangerous trees, but the exemption is not automatic. You still have to notify the city. The fast path is usually a call or email to the city's forestry desk with photos of the dead tree. A staff inspector confirms condition and either issues authorization or asks for the standard application with a dead-tree note.

Hazardous is different from dead. A hazardous tree is alive but at imminent risk of failure (cracked trunk, heavy lean over a target, root plate lifting). Cities fast-track removal authorization if an arborist's hazard assessment supports it. We write the assessment as part of our quote when we see one on site.

Species exemptions vary. Some invasive species are removable without a permit even at the size threshold. Manitoba maple is the most common one asked about. Black locust and ailanthus also appear on exemption lists in some cities. The list changes yearly. Confirm before you cut.

Do not cut first and ask later. Fines apply even if the tree turns out to have been dead. Cities investigate sudden stump appearances and pull satellite imagery from previous seasons. We have done forensic arborist reports for homeowners trying to defend no-permit removals after the fact. The math never works.

Arborist report: what it is and when you need one

An arborist report is a formal document, signed by a certified arborist, that the city uses to decide. Cities require it any time the tree is alive, borderline, or large enough to flag as significant. Some renovation-driven removals require it. Most dead-tree removals do not.

The report covers species, DBH, height, condition rating, location, reason for removal, replanting plan, and the arborist's professional opinion. Oakville and Mississauga require a recognized template. Toronto accepts arborist-letterhead reports.

Cost varies. A single-tree report runs in the low hundreds. A multi-tree report for a renovation site runs higher. We typically roll the report into the removal quote when the bylaw requires one. For a standalone report (insurance dispute, neighbour conflict, pre-listing inspection), expect to pay for the visit and writing time on its own.

If the report says removal is the right call and the city agrees, we proceed. If the city says no, we explore pruning as the alternative.

What we handle when you hire us for a permit removal

When the bylaw applies, the application is most of the friction. The cut is the easy part. Here is what gets handled on a normal permit job in Toronto, Mississauga, or Oakville:

Site visit. We measure the tree, photograph it, identify the species, and check whether it sits in a tree-protection zone or on a heritage register.

Arborist report. Written on site or back at the desk depending on complexity. Delivered to you and to the city with photos and measurements attached.

Application filing. We submit the city's permit application on your behalf, attach the report, and pay the city fee from the deposit. You sign one form. We chase the inspector and the decision.

Timing the removal. Permits include start and end dates. We schedule the removal inside that window, coordinate with neighbours if drop zones extend onto adjacent property, and notify the city when work is done. If replanting is required, we either plant the replacement that season or hand you a planting plan.

Whether it is a tree removal permit Toronto, a Mississauga band application, or an Oakville circumference-threshold file, the process from your end is one site visit, one signature, and a single bill at the end.