Tree service in Lake Oswego, Oregon

Tree removal permits in Lake Oswego

Lake Oswego’s code covers nearly every yard tree. LOC 55.02.025 requires a permit for any tree 6 inches DBH or larger. On single-family lots, a Type I permit with no review allows up to two trees of 15 inches DBH or less per year, plus fruit trees, but not in historic districts, RC or RP zones, or for heritage or public trees. Everything else goes through Type II review. Planning and Building Services handles it at 503-635-0290 or trees@lakeoswego.city; filing fees are set by Council resolution and were not published.

Replacement under 55.02.084 is generally one tree per tree removed, 1.5-inch deciduous or 6-foot evergreen, and 2:1 for significant trees in development. It does not apply to dead, hazard or Type I removals. Trees on public property or in the right-of-way cannot use Type I at all. Heritage trees fall under Article 55.06. The Oregon permit guide compares other cities.

Every city compared: tree removal permits in Oregon.

Source: Planning & Building Services (503-635-0290, trees@lakeoswego.city), Lake Oswego Code Article 55.02 (55.02.025, 55.02.084); heritage trees Article 55.06. Checked 2026-10-02.

Storm records for Clackamas County (covers Lake Oswego)

Fire sits unusually high in Clackamas County’s record. NOAA logged 198 storm reports for the county since 2016, ranking it 8th of Oregon’s 36, and while heavy snow leads with 64, wildfire is second at 35, ahead of strong wind at 32 and winter storm at 28. High wind adds 14, and the list stretches to hail, tornado and lightning.

FEMA’s National Risk Index (December 2025) rates strong wind Relatively High at 93.4 and ice storm Relatively High at 90.9. December, February and January are the peak months, holding 66 percent of reports. The latest three years logged 48 reports against 86 in the three before, a drop worth noting but not a reason to skip winter inspections.

NWS forecast zones covering the county: Clackamas County Cascade Foothills; East Central Willamette Valley; Inner Portland Metro; North Oregon Cascades; Outer Southeast Portland Metro; Tualatin Valley.

Source: NOAA NCEI Storm Events Database, 2016 to June 2026 · NWS zone-county correlation files (2019 to 2026 versions). Checked 2026-10-02. NOAA Storm Events 2016-2026; zone-based events assigned to every county the NWS zone covers using the zone-county correlation file in force on the event date (2019-04-02 file used for 2016-2018).

Power lines and utilities in Lake Oswego

No electric utility is mapped for Lake Oswego on this site yet. Check your bill for the provider, then look it up in the utility directory to see who trims near lines and where to report outages. A tree touching any line is the utility’s to handle first; see tree removal near power lines.

Source: utility vegetation-management pages linked above; OAR 437-002-0306 (OR-OSHA). Checked 2026-10-02.

Pests and quarantines

Emerald ash borer (EAB) · quarantineMediterranean oak borer (MOB)

Emerald ash borer is confirmed here and Lake Oswego is inside the Oregon quarantine. Keep raw ash wood within the quarantine, move it only as chips of 1 inch or less or kiln-dried debarked lumber, and cover loads from April 1 to September 30. Mediterranean oak borer is also confirmed: do not move cut oak firewood more than 10 miles, and chip or burn infested trees and their stumps on site. Details on the Oregon EAB page.

• Emerald ash borer (EAB): OR (ODF/ODA): keep raw ash wood inside the quarantine; move only as <=1-in chips or kiln-dried debarked lumber, or heat 160F core for 60 min with ODA permission; cover loads during flight period Apr 1
• Mediterranean oak borer (MOB): Don't move cut oak firewood >10 miles from source; cut then burn or chip (<=1 in) infested trees including the stump on site; report with photos/location to Oregon Invasives Hotline

Source: Emerald ash borer (EAB) · Mediterranean oak borer (MOB). Checked 2026-10-02.

Growing conditions in Lake Oswego

Lake Oswego sits in USDA hardiness zone 9a. Replacement trees under 55.02.084 must be at least 1.5 inches for deciduous or 6 feet for evergreen; skip ash given the quarantine, and favor species that tolerate wet-snow loading and east-wind exposure.

USDA hardiness zone 9a (2023 map, by ZIP code).

Source: USDA Plant Hardiness Zone Map 2023 (OSU PRISM ZIP data). Checked 2026-10-02.

Labor index for Lake Oswego

BLS puts the mean hourly wage for tree trimmers and pruners in the Portland-Vancouver-Hillsboro area at $35.04, median $36.33, across about 1,160 workers (May 2025). That is a wage, not a price; permit time, replacement planting and EAB-compliant disposal show up in the modeled ranges.

Portland-Vancouver-Hillsboro, OR-WA: $35.04 per hour mean wage for tree trimmers and pruners (BLS, May 2025). This is a labor index, not a price; the modeled crew-hour cost used on this site is $225 (method).

215 landscaping-services establishments were counted in Clackamas County in 2023 (Census County Business Patterns, NAICS 561730).

Source: BLS Occupational Employment and Wage Statistics, May 2025, SOC 37-3013 · U.S. Census Bureau, County Business Patterns 2023, NAICS 561730. Checked 2026-10-02.

ZIP codes and nearby cities

Lake Oswego spans ZIP codes 97034, 97035, 97219 and 97068, with 39,722 residents in 2025. Tigard, Milwaukie, West Linn and Tualatin are each 4 miles away; Beaverton and Oregon City are 7. See the Clackamas County page for county data.

ZIP codes with the most land inside Lake Oswego: 97034970359721997068

• Tigard4 miles
• Milwaukie4 miles
• West Linn4 miles
• Tualatin4 miles
• Beaverton7 miles
• Oregon City7 miles

County page: Clackamas County.

Source: U.S. Census Bureau, 2020 ZCTA to place and county relationship files. Checked 2026-10-02.

Tree services in Lake Oswego

The service pages carry the 6-inch rule and the Type I allowance into each job: tree removal, tree trimming, stump grinding with EAB wood rules, and emergency tree service after snow or east wind.

• Tree removal in Lake Oswego
• Tree trimming (statewide guide)
• Stump grinding in Lake Oswego
• Emergency tree service (statewide guide)
• Arborists and tree health
• Check a license in Oregon

What to do next

Measure the trunk; if it is 6 inches or more, decide whether Type I covers it or Type II review applies, and contact Planning at 503-635-0290. For a damaged or leaning tree, a risk assessment supports a hazard removal. Check the contractor in the Oregon license lookup before signing.