Section 01
Ownership is the first question, not size
Before anything else, establish which trees on and around the site are City-owned. Boulevard trees, open space trees and trees within natural stand boundaries are the City's; trees standing wholly on the parcel are the owner's; a trunk straddling a boundary is a shared question that a surveyor and a lawyer resolve rather than an arborist.
This ordering matters because the permit regime follows ownership. A very large private tree may sit entirely outside the Public Tree Permit process while a modest boulevard tree beside the driveway triggers it. Judging by appearance rather than ownership produces the wrong answer in both directions.
Section 02
What triggers a permit
The City's stated trigger is measured. A Public Tree Permit is required for work done within five metres of the trunk of a boulevard or open space tree, or within ten metres of a natural stand boundary. Vehicular access on roadways, driveways, sidewalks and improved trails on a paved or granular surface is excluded.
Applicants are directed to confirm first whether a permit is required, using the City's Public Tree Permit map of natural stand boundaries and boulevard and open space trees. Because the trigger is a distance, it captures activity that owners rarely think of as construction: material laydown, bin placement, temporary access across a boulevard and trenching for services can all fall inside the radius even when the building work does not.
Distances and exclusions are set by the City and may change; confirm the current requirement on the City's Public Tree Permit page before relying on a figure.
Section 03
Documented: what the permit record establishes
An issued Public Tree Permit establishes that the City was engaged about identified trees, that conditions were set, and that the work was contemplated with a tree protection arrangement in place. Active permits are reflected on the City's tree preservation map, which is a useful check for a buyer or neighbour who wants to know whether the process was followed at all.
For a purchaser researching a recently built house, the presence of a permit alongside the development and building permits is a small but real signal that the site was run through the correct processes rather than around them.
Section 04
Not documented: the limits of a tree permit
A permit does not certify that a tree survived, that its root system is intact, or that its long-term health is sound. Compaction and bark damage can be irreparable and may take years to express, and the City is explicit that mature-tree benefits are not replaced for many years by planting a new one.
Nor does a permit speak to private trees on the parcel. Their condition, structural safety and remaining life are matters for a qualified arborist, and their position relative to foundations, services and boundaries is a survey and engineering matter rather than a permit one.
Section 05
Pre-construction sequence
Confirm ownership and measure distances from trunks and natural stand boundaries against the City maps. Where a permit is required, apply before the site is mobilised, and build the protection zone into the site plan rather than negotiating it around a delivery schedule. Identify access, laydown and bin positions on a drawing so that the protected area is respected by every trade rather than by the one that read the permit.
For a buyer rather than a builder, run the same check in reverse. If you intend to add a garage, widen a driveway, re-service the house or excavate for an addition, establish before the offer whether nearby City trees will shape what is achievable on the lot.
Section 06
Owner and seller evidence pack
Keep the permit, the tree protection plan and its conditions, dated photographs of the protection in place, arborist reports for private trees, and any correspondence with Urban Forestry. Where a private tree was removed, keep the record of why and by whom.
A seller who can produce this pack answers a canopy question in one exchange. A seller who cannot leaves a purchaser to assume the worst about a mature yard that may in fact have been managed carefully throughout.
Section 07
When to bring in a specialist
Engage a certified arborist where a private tree is close to proposed excavation, where decline is visible, or where a tree sits near a structure or a boundary. Engage a land surveyor where a trunk may straddle a property line. Engage the City directly where a City tree is involved, because no consultant can waive a municipal requirement.
Engage a lawyer where damage to a City or neighbouring tree has already occurred, since the consequences are not confined to horticulture.
Requirements depend on the specific trees, distances and work involved. This page cannot determine whether a permit is required for your project.