How does the Toronto tree protection bylaw affect my reno?

Toronto's tree protection bylaws can significantly impact your renovation plans — and ignoring them can result in fines up to $100,000 per tree, so this is something to take seriously before breaking ground.

The City of Toronto has two main layers of tree protection you need to understand: the Private Tree Bylaw and the Street Tree Bylaw, plus additional protections for ravine and natural feature areas.

Private Trees on Your Property

Any tree on private property with a trunk diameter of 30 cm or more (measured at 1.4 metres above grade) is protected under Toronto's Private Tree Bylaw. You cannot injure, destroy, or remove a protected tree without a permit — and "injury" includes damaging roots, which is where most renovations run into trouble. If your project involves excavation, foundation work, a new driveway, or even a deck, the critical root zone of a nearby tree may be affected. This zone typically extends outward roughly 12 times the trunk diameter, so a large tree can have a protected root zone stretching well into your renovation footprint.

To remove or significantly impact a protected tree, you'll need to apply through the City of Toronto Urban Forestry department. They'll assess the tree and may require you to hire a certified arborist to prepare a report. Removal permits often come with a replacement planting requirement — sometimes multiple trees to compensate for the one removed.

Street Trees and the Boulevard

Trees on the city's boulevard (between the sidewalk and road) are protected under the Street Tree Bylaw regardless of size. If your renovation involves a new driveway crossing, utility trenching, or any work near the boulevard, you'll need Urban Forestry's sign-off. Contractors working near street trees are typically required to install protective fencing around the root zone before any work begins.

Ravine Lots and Natural Features

If your property backs onto a ravine, you're dealing with an additional layer — the Ravine and Natural Feature Protection Bylaw. This restricts grading, vegetation removal, and construction within or adjacent to the ravine area. Projects near ravines often require a Ravine Permit and may involve Toronto and Region Conservation Authority (TRCA) review as well.

For your renovation, the practical steps are: have a certified arborist assess any trees near your work zone before you finalize your plans, flag tree protection requirements with your contractor early (good contractors will already know to ask), and budget for potential arborist reports ($500–$1,500 typically) and any required tree replacement.

Contact Urban Forestry at 311 or visit toronto.ca/trees to start a permit application or get a pre-consultation. If your building permit application involves work near protected trees, the Building Division will loop in Urban Forestry automatically — but it's better to get ahead of it than to have your project delayed mid-construction.

Browse contractors in our directory at Toronto Construction Network — experienced local contractors will be familiar with these requirements and can help you plan around protected trees from day one.