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. This year marks the 150th Anniversary of National Arbor Day. For the second year in a row, Governor Brown has proclaimed the entire month of April as Oregon Arbor Month, and Mayor Buck proclaimed April Lake Oswego Arbor Month, too. Click here to read the City’s proclamation.

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! Also customers can email  to submit an application or call 503-635-0290 and ask for the Planner on Duty if you have questions.

Submitting a Tree Removal or Tree Protection Application

Please email a pdf copy of your tree application to After processing the application, staff will contact you by phone to collect credit card payment for the permit fee. 

Returning Yellow Type II Notice Signs 

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

Quick Links
Application Forms Pending Type II Permits