Tree Protection Hoarding in Oshawa
Built to City of Oshawa standard drawing 25-P604, Tree Protection Zone.
What Oshawa requires
Oshawa’s standard is drawing 25-P604, Tree Protection Zone (April 2025). It requires:
- Barrier: tree protection hoarding of heavy-duty orange plastic fencing, page wire, or 12 mm plywood solid hoarding, as shown on your plans.
- Frame: 2.4 m steel T-bars driven at least 1.2 m into the ground, with pressure-treated 2×4 top and bottom rails, and the fabric wired on with #10 galvanized wire.
- Groups of trees: fencing at least 1 m beyond the drip line.
- Before work starts: the hoarding is inspected and approved by the City before any construction.
- For the whole job: it stays up until construction is complete or the City directs otherwise, and the contractor inspects and maintains it.
- Inside the zone: no construction, grade changes, or equipment or material storage.
Minimum protection distances
Oshawa measures these distances from the outside edge of the drip line, not from the trunk. Trunk diameter is measured at 1.4 m above grade.
| Trunk diameter | Distance beyond the drip line |
|---|---|
| Under 10 cm | 1.8 m |
| 11–40 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 |
Need it built in Oshawa?
Send us your permit conditions or Tree Protection Plan and we’ll quote it to Oshawa’s spec.
What we build in Oshawa
Hoarding to drawing 25-P604: T-bars driven to depth, pressure-treated top and bottom rails, and the fabric type on your plans, whether orange fence, page wire or plywood.
Oshawa FAQ
Is Oshawa’s distance measured from the trunk?
No. Drawing 25-P604 measures the minimum distance from the outside edge of the drip line.
Does the City inspect it?
Yes. The hoarding must be inspected and approved by the City before any construction starts.
Do you build to the arborist report?
Yes. We build what the arborist report states: the protection zones, the barrier type and any extra measures it calls for. Where the report asks for more than the City minimum, we build to the report.
Can you recommend an arborist?
Yes. If your permit needs an arborist report or Tree Protection Plan and you don’t have one yet, tell us when you get in touch and we’ll recommend an arborist.
From the municipality’s own documents
Requirements summarized from the documents above. Your permit conditions or approved Tree Protection Plan always take precedence. Confirm with the municipality if anything differs.
Tree protection in Oshawa?
Send us your permit conditions, site plan or arborist’s Tree Protection Plan and we’ll quote it to your municipality’s spec.