Tree Code

The purpose of the Tree Code is to preserve the wooded character of the City of Lake Oswego and to protect trees as a natural resource of the City by:

  • Regulating the removal of trees;
  • Encouraging and assisting property owner in managing large forested properties; and
  • Prescribing preventative protection measures to avoid damage to trees during site development.
  • Tree Code fees - Please select current fiscal year, and go to page 51.

News & Announcements

Arbor Month

Arbor Day is America’s National Tree Holiday, observed on the last Friday of April to celebrate the role of trees in our lives and to promote tree planting and care. Here in Lake Oswego, we celebrate the entire month of April as Lake Oswego Arbor Month. Click to read the City's Arbor Month proclamation 2023

Read More about Arbor Month
Urban & Community Forestry

April is Arbor Month!

Read More about Urban & Community Forestry
Tree Care and Maintenance

Seasonal Tree Care Tips: Seasonal Tree Care Tips:The City’s contract arborist prepares tree maintenance and care articles quarterly that contain seasonal tips and advice on caring for your trees. 

Read More about Tree Care and Maintenance
Tree Code Frequently Asked Questions

Find answers to many frequently answered questions.

Read More about Tree Code Frequently Asked Questions
Contact Information

The Permit Center is open to walk-in customers Monday through Friday, from 8 a.m. to noon, or a Planner is available for tree questions from 8 a.m. to 5 p.m. by emailing or calling 503-635-0290 and asking for the Planner on Duty.

Submitting a Tree Removal or Tree Protection Application

Please submit applications either in person or to If emailed, once the application is processed by staff you will be contacted via phone or email to collect the application fees and arrange for sign pick-up (Type II tree removal request only).

Returning Yellow Type II Notice Signs 

After you have received your Type II tree removal permit, please return your yellow notice sign to the entry vestibule at the southwest corner of City Hall, 380 A Ave., off the lower parking lot. The vestibules are accessible 24 hours. Thank you for returning your sign for reuse!

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Application Forms Pending Type II Permits