Zoning Overlays & Bonuses in Washington County, OR (2026)
1 county-level rule, plus city-specific rules for 2 cities in Washington County, Oregon.
Verified from official government sources
Note: These county rules apply to unincorporated areas of Washington County. If you live within an incorporated city, that city's own rules apply: see the city list below.
Density Bonus Law
In unincorporated Washington County's R-6 North Bethany District, a project may add up to three units per acre above the base five-to-six-unit density, reaching nine units per acre, but only through a Type III Planned Development on a site the North Bethany Subarea Plan designates as bonus-eligible.
Washington County North Bethany Density Bonus
Some RestrictionsWashington County Community Development Code § 390-8.5.B(2)
B.Other housing (residential development that does not meet the definition of Middle Housing in Section 106):(1)The permitted residential density shall be no more than six units per acre and no less than five units per acre, except as otherwise specified by Section 300-2 or by Section 390-8.5 B(2) below.(2)A density bonus is permitted when the following standards are met:(a)The development shal...
Zoning Overlays & Bonuses by City in Washington County
2 cities in Washington County have their own zoning overlays & bonuses rules. Each link goes to that city's dedicated page with code citations.
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