When it triggers
Title 11 review fires automatically on:
- Any proposed removal of a tree ≥12" DBH on the development site (or a tree of any size where Chapter 11.40 also applies — your designer should confirm)
- New construction inside the root protection zone of a regulated tree (yours or a neighbor's)
- Lots in certain overlays (Tree Code mitigation areas)
If your tree walk at step 0.4 turned up no flags, this step is short or unnecessary. If a 12"+ tree sits near your footprint, expect it to be the slowest discipline.
What you might be asked to do
- Revise the footprint to stay outside a tree's root protection zone.
- Pay a mitigation fee in lieu of replanting (~$300-$600 per inch of DBH removed).
- Plant replacement trees at a 2:1 or 3:1 ratio.
- Install root protection fencing during construction.
- Provide a tree protection plan stamped by an ISA-certified arborist.
When to push back
If Urban Forestry says a tree has to stay and your project can't proceed without removing it, you can apply for a tree removal permit citing hazard, dead-or-dying status, or unavoidable conflict. Hazard removals with arborist documentation are routinely granted; healthy-tree removals are hard.
Where this information came from
- Portland Permitting & Development — Accessory Dwelling Units · retrieved April 23, 2026
- Portland City Code Title 33.205 — Accessory Dwelling Units · retrieved April 23, 2026
- Portland Maps (per-address zoning, hazards, utilities) · retrieved April 23, 2026
- Portland PP&D — System Development Charges (current fee schedules) · retrieved April 23, 2026
- Oregon CCB — Verify a Contractor · retrieved April 23, 2026
- Accessory Dwellings (Kol Peterson) — Portland-focused ADU resource · retrieved April 23, 2026