Tree Removal and Tree Protection Requirements

Tree Removal

A permit is required to remove a tree 6 inches in diameter (DBH), measured a breast height (4.5 feet from the ground) or greater. Please refer to the  City’s Tree Removal Guide for instructions on how to measure DBH and for more detailed information on tree removal types and restrictions.

Tree Removal Permits

The Reference Table of Permit Types summarizes the types of tree removal permits, submittal requirements and fees.

The Permit Center is open to walk-in customers Monday through Friday, from 8 a.m. to noon, or applications can be submitted via email to or US mail to City of Lake Oswego Planning Dept (Trees), P.O. Box 369, Lake Oswego, OR 97034.

Tree Protection

Prior to conducting any development activities on a property, including but not limited to, clearing, grading, construction, excavation or demolition work, tree protection measures are required to be in place to protect trees potentially affected by development work. The applicant must submit a  Tree Protection Permit Application, have protection measures in place and have the site inspected and approved by Staff prior to the building permit being issued. Please note: Tree Protection may also be required prior to the issuance of a plumbing permit.

Tree Protection inspections are available Monday – Friday, 12:30 p.m. to 2:30 p.m. and can be requested by contacting


You may find an answer to your questions here, or by contacting Planning staff at 503-635-0290 or