6 county-level rules, plus city-specific rules for 4 cities in Washington County, Oregon.
Verified from official government sources
Unincorporated Washington County does not have a dedicated STR permit requirement. Short-term rentals must comply with applicable zoning under the Community Development Code. Oregon has no statewide STR permit; regulation is primarily local.
STR guests in unincorporated Washington County must comply with Chapter 8.24 noise control and general nuisance ordinances under Chapter 8.20. Oregon DEQ residential noise standards apply at all times.
Oregon's statewide 1.5% Transient Lodging Tax applies to all short-term stays under 30 nights. Washington County may impose additional local TLT. Individual cities within the county (e.g., Tigard, Tualatin) impose their own 2.5% local TLT.
Parking in unincorporated Washington County is regulated by county ordinances. Parking against traffic, over 18 inches from curb, storing vehicles on streets, and blocking cluster mailboxes can result in parking tickets from the Sheriff's Office.
Washington County does not regulate short-term rental occupancy in unincorporated areas. The Board declined to adopt STR regulations in the 2023-25 Planning Work Program. STR operators must still comply with state transient lodging tax and fire/building codes.
Washington County does not require STR operators to carry commercial liability insurance. Standard homeowners policies often exclude commercial rental activity; operators should confirm coverage with their carrier or obtain an STR rider.
4 cities in Washington County have their own short-term rentals rules. Each link goes to that city's dedicated page with code citations.
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