phone: (503) 823-TREE (8733)
1900 SW 4th Avenue, Portland, OR 97201
A permit is required to plant street trees in the right-of-way.
The planting season in Portland extends from October 1 through April 30. Planting during this timeframe is recommended. Planting during the summer months (May 1-September 30) is not recommended. Trees planted during the summer months should receive extra watering as needed to ensure tree survival and establishment.
If a non-development permit is issued outside of the planting season, planting may be deferred until the next planting season in order to promote survivability. Talk to your Tree Inspector about deferring planting until the planting season.
Newly planted trees must be a minimum caliper size as defined below. This is to encourage planting large caliper trees, which have more desirable established structure and are less prone to vandalism. Tree caliper is measured at 6” above the tree’s natural ground line for trees <4”, or at 12” for trees >4”.
Broadleaf tree size requirements:
|Development type||Street tree minimum caliper size||Private tree minimum caliper size|
|One and two family residential||1.5”||1.5"|
Conifer tree size requirements: Conifer trees must be a minimum of 5 feet in height at time of planting.
Street tree species for planting must be selected from the Approved Street Tree Planting List that corresponds to planting site conditions.
Trees on the nuisance list may not be planted as street trees or on private property.