Local tree-rule guide
Guelph tree rules
Private trees: 10 cm+ on lots >0.2 ha; 30 cm+ on lots ≤0.2 ha.
The local rule
Guelph's Private Tree Protection By-law uses different size thresholds depending on property size.
The City's current guidance regulates trees 30 cm or more in diameter on properties of 0.2 hectare or less, while a 10 cm threshold applies on larger properties, subject to exemptions.
On private properties larger than 0.2 hectares, Guelph regulates trees 10 cm and larger in diameter measured 1.4 m above ground.
On properties 0.2 hectares or smaller, the City regulates private trees 30 cm and larger at the same measurement height.
Work that injures or destroys a regulated tree requires a permit under the Private Tree Protection Bylaw; other approvals such as heritage permits can still apply in some situations.
Application details
What Guelph requires after a tree meets the bylaw threshold
- Guelph’s updated Private Tree Protection Bylaw is more than a size test.
- Once a tree is regulated, the City’s current process combines an application fee, supporting plans or photos, replacement calculations, posting requirements and a defined permit life.
On private lots larger than 0.2 ha, trees 10 cm DBH or larger are regulated. On lots of 0.2 ha or less, the threshold is 30 cm DBH. Measurements are taken 1.4 m above ground.
The City charges $150 for an application covering one to three trees, then $50 for each additional tree, with the permit application fee capped at $500.
The City says one replacement tree is required for every 15 cm of regulated-tree diameter removed. Where replacement planting is required, the security deposit is $350 per tree; where planting cannot be accommodated, the replacement fee is also $350 per tree.
Applications generally need a drawing showing tree location, species, DBH and dripline plus photos. A Tree Inventory and Preservation Plan can be required. Completely dead trees and high/imminent-risk trees certified by an arborist or forester are among the published exemptions.
An approved permit must be posted visibly at least five days before work begins. Permits are generally valid for 90 days, with one possible extension of up to another 90 days if requested at least 30 days before expiry. Refusals or permit conditions can be appealed within seven days; the published appeal fee is $300.
Before work starts
- Ownership: check the property line. Public and boundary trees may follow a different process.
- Site context: review any development approval, covenant or protected-area conditions.
- Work requirements: confirm any permit, exemption or protection requirements that apply to the planned work.
Official sources
Primary municipal source reviewed October 1, 2026. Rules can change; confirm with the local authority before work. How we research