An Arborist Report submitted in support of this application must be completed by a Certified Arborist and must identify the surveyed location, common and scientific species name, Tree Protection Zone (TPZ), diameter at breast height (DBH), height and condition of the Tree(s), and:
- Provide the justification for any proposed destruction of the Tree(s), and/or provide justification and impacts for any proposed injury of the Tree(s).
- Describe Tree protection measures or other mitigating activities to be implemented.
- Include a map of the subject property that clearly shows the location of each Tree assessed in the Arborist Report.
- Where multiple Trees are assessed in the Arborist Report, provide an inventory table as part of the Arborist Report.
Hazardous Tree means a Tree or portion of a Tree that is destabilized or structurally compromised to an extent that it is likely to lead to a loss, personal injury, property damage, or disruption of activities and/or has a risk rating of High or Extreme, as determined by a Qualified Tree Risk Assessor (TRAQ). A tree is not hazardous solely because it is located in close proximity to a building.
Please note that any of the following actions are considered to be Injury to a tree and require a permit:
- To harm, damage, impair or not protect a Tree in accordance with proper arboricultural practices and the City of Richmond Hill Standards and Specifications Manual, entirely or in part, and/or any acts which will harm a Tree's health or damage a Tree in any manner.
- Removal of more than 20% of the live tissue of a Tree within a twelve (12) month period.
- Encroachment into the Tree Protection Zone.
Tree Protection Zones
The Tree Protection Zone is measured as a radius from the edge of the tree trunk and is dependent on the trunk size of the tree measured as the diameter of the trunk 1.4 metres above the ground.
Tree Diameter at Breast Height |
Tree Protection Zone |
10-14 cm |
1.8 m |
15-20 cm |
2.0 m |
21-30 cm |
2.4 m |
31-40 cm |
2.4 m |
41-50 cm |
3.0 m |
51-60 cm |
3.6 m |
61-70 cm |
4.2 m |
71-80 cm |
4.8 m |
81-90 cm |
5.4 m |
91-100 cm |
6.0 m |
=/>101 cm |
TPZ=DBH*6 |
Tree Replacement Requirements
Diameter at Breast Height of Tree proposed to be removed
|
# of Replacement Trees Required
|
10-14 cm
|
0
|
15-20 cm
|
1
|
21-30 cm
|
2
|
31-40 cm
|
2
|
41-50 cm
|
3
|
51-60 cm
|
4
|
61-70 cm
|
4
|
71-80 cm
|
5
|
81-90 cm
|
5
|
91-100 cm |
6 |
=/>101 cm |
7 |

If you have any questions, please email Planning@richmondhill.ca.
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