Every Oregon county

Counties that have taken one up

• Clackamas

  Adopted both options effective September 3, 2024: rural accessory dwelling units under Zoning and Development Ordinance Section 839 in the RA-2, RRFF-5, FF-10, RR and FU-10 districts and in RA-1 inside designated unincorporated communities, and a recreational vehicle as a second dwelling on single-family residential zoned land, capped at 400 square feet.

  Checked September 9, 2026 · source

• Columbia

  Adopted accessory dwelling units in the RR-2 and RR-5 zones by Ordinance 2023-1 (hearing August 15, 2023; integrated into the zoning ordinance October 12, 2023) at Section 224.2: at least two acres, 900 square feet, within 100 feet of the dwelling, fire protection district service, no vacation occupancy. The zoning ordinance as integrated through August 2023 carries no recreational vehicle rental dwelling provision.

  Checked September 9, 2026 · source

• Coos

  Adopted rural accessory dwelling units in the RR-2 and RR-5 zones in 2024 through text amendment AM-24-002, recommended by the Planning Commission on June 6, 2024 and reported as approved by the Board of Commissioners by Final Decision and Order 24-07-030PL on July 22, 2024: at least two acres, one single-family dwelling, 900 square feet, within 100 feet, with the home-hardening building standards of ORS 215.495 applying.

  Checked September 9, 2026 · source

• Crook

  Adopted accessory dwelling units by Ordinance 344 (2024), but only in the parts of the R-5 and R-10 rural residential zones west of Highway 27 and south of Highway 370, under Crook County Code 18.124.140. Planning Commission work sessions in October 2023 and January 2024 recorded that the county had not opted into the recreational vehicle rental dwelling statute; whether that has changed since was not established.

  Checked September 9, 2026 · source

• Curry

  Zoning ordinance amendment ZOA.2022.01, approved by the Board of Commissioners in August 2022 as reported locally, added accessory dwelling units as a permitted use in the Rural Residential (RR) zone at Section 3.082, alongside short-term rental and R-2 density changes. The current ordinance text was not retrieved from the county's own site.

  Checked September 9, 2026 · source

• Deschutes

  Adopted rural accessory dwelling units on November 1, 2023, effective December 1, 2023 (text amendment 247-22-000671-TA: the MUA-10 and rural residential zones, at least two acres, 900 square feet, within 100 feet, fire protection service), and recreational vehicles as rental dwellings by emergency ordinance on May 7, 2025 (247-23-000700-TA: the RR-10, MUA, SR 2½, UAR-10 and WTZ zones; at least two acres, five in parts of South County; within 100 feet of the primary dwelling).

  Checked September 9, 2026 · source

• Douglas

  Allows rural accessory dwelling units on land zoned for rural residential use outside an urban growth boundary, documented in the county's Rural Accessory Dwelling Unit Agreement (2024): one existing lawfully established single-family dwelling, 900 square feet of usable floor area, within 100 feet, sanitation compliance, one added off-street parking space, and no land division separating the unit.

  Checked September 9, 2026 · source

• Jackson

  Adopted accessory dwelling units by Ordinance 2024-06, effective November 25, 2024: on rural residential zoned parcels outside an urban growth boundary and urban reserve, at least two acres, 900 square feet of usable floor area, within 100 feet of the existing dwelling, with fire-safety access standards.

  Checked September 9, 2026 · source

• Jefferson

  The county's accessory dwelling unit page states standards adopted under SB 391: at least two acres with exactly one existing single-family dwelling, 900 square feet of usable floor area, no overnight rental and a 45-day minimum rental period. The same page lists the rural residential zones (RR-2, RR-5, RR-10 and RR-20) and several community zones as those considered; confirm which zones the adopted ordinance covers.

  Checked September 9, 2026 · source

• Josephine

  Josephine County Code 19.61.020(B) allows one accessory dwelling unit in the rural residential zones: at least two acres, not in an urban reserve, 900 square feet, within 100 feet of the dwelling, the wildfire and emergency safety standards of Chapter 19.76, and no vacation occupancy. The chapter's history runs through Ordinance 2025-003 (November 13, 2025).

  Checked September 9, 2026 · source

• Lane

  Adopted rural accessory dwelling units by Ordinance 23-05 on August 29, 2023 (Lane Code 16.290(8)) and recreational vehicles as rental dwellings by Ordinance 25.01, effective February 27, 2025 (Lane Code 16.290(9)): rural residential land outside an urban reserve, an owner-occupied dwelling with no other dwelling units, and not within the regulatory floodplain.

  Checked September 9, 2026 · source

• Linn

  The county's accessory dwelling unit pre-application checklist sets standards for the RR-1, RR-2.5, RR-5 and RR-10 zones: at least two acres, 900 square feet of usable floor area, within 100 feet of the existing dwelling, with septic, water, emergency access and fire access standards.

  Checked September 9, 2026 · source

• Marion

  Adopted accessory dwelling units in the Acreage Residential (AR) zone by Ordinance 1458 in January 2024 (Marion County Code 17.128.020(K)): parcels over two acres, not in an urban reserve or a groundwater-restricted area, 900 square feet, within 100 feet of the primary dwelling, with a recorded deed restriction. Recreational vehicles, park models and tiny houses on wheels do not qualify as the unit.

  Checked September 9, 2026 · source

• Tillamook

  Land Use Ordinance Section 3.010 (final May 22, 2024) lists an accessory dwelling unit as defined in ORS 215.495 as a use permitted outright in the RR-2 and RR-10 zones, subject to Section 3.010(5): not in an urban reserve, at least two acres, one single-family dwelling, no guest house or other dwelling unit, and a recreational vehicle or yurt may not serve as the unit. Recreational vehicles are otherwise permitted outright during construction and conditionally under Section 5.130; no adoption of the rental dwelling statute was found.

  Checked September 9, 2026 · source

• Union

  Adopted accessory dwelling units in the R-1, R-2, R-3 and R-4 zones by Ordinance 2024-03 (second reading August 21, 2024): at least two acres, an existing single-family dwelling, fire protection district service, within 100 feet, 900 square feet, no vacation or short-term occupancy, approved by the Planning Commission as a conditional use after a public hearing with a $300 application fee, and excluded in the Medical Springs and Pondosa area.

  Checked September 9, 2026 · source

• Wallowa

  The Land Development Ordinance's Rural Residential (R-1) article, adopted December 7, 2022, allows an accessory dwelling unit by administrative review meeting all requirements of ORS 215.495, capped at 900 square feet, sharing the dwelling's approved sewage system, and reducing the number of recreational vehicles allowed on the parcel to one. Adoption of the recreational vehicle rental dwelling statute was not established.

  Checked September 9, 2026 · source

• Wasco

  Housing amendments to the Land Use and Development Ordinance, reported as adopted by the Board of Commissioners after a May 21, 2025 hearing and effective June 13, 2025 absent appeal, add accessory dwelling units on rural residential land under the state criteria, capped at 900 square feet. The adopted ordinance text was not retrieved from the county's own site.

  Checked September 9, 2026 · source

• Washington

  Adopted rural accessory dwelling units by A-Engrossed Ordinance 912 on April 28, 2026, effective May 28, 2026, in the AF-10, AF-5 and RR-5 districts (Community Development Code Section 430-3): outside a UGB and urban reserve, at least two acres, one primary dwelling, a fire protection service letter, no groundwater-restricted area, 900 square feet, within 100 feet, no vacation occupancy. Living in a recreational vehicle remains prohibited apart from an approved health hardship.

  Checked September 9, 2026 · source

• Yamhill

  Zoning Ordinance Section 1014 (Ordinance 906 of June 28, 2018, amended by Ordinance 928 on June 29, 2023) allows accessory dwelling units on rural residential land outside a UGB: at least two acres, not in an urban reserve, within 100 feet of the dwelling, 900 square feet or 75 percent of the primary dwelling's floor area, whichever is less. A recreational vehicle may not be used as the unit.

  Checked September 9, 2026 · source

ORS 215.490 — RV as a second dwelling (SB 1013, 2023)

Optional for counties: the statute says a county 'may allow' this use, so it has no effect anywhere until adopted locally. As of September 2026 three counties — Clackamas, Deschutes and Lane — have adopted it by ordinance, Hood River County has it under discussion, and five counties' own materials show it has not been taken up. An entry recorded as not confirmed means this site has not found the county's position, which is neither a yes nor a no. Counties can adopt at any time, so treat any 'not adopted' entry as a prompt to re-check rather than a permanent answer. Note the statute generally requires owner occupancy of a primary dwelling on the same property and generally prohibits vacation occupancy or other short-term use of the recreational vehicle.

Last verified September 9, 2026 · source

SB 391 (2021) / SB 644 (2023) — rural accessory dwelling units

Optional for counties, and adoption spread widely between 2023 and 2026: the counties recorded as adopted below are confirmed from their own code or published materials unless the entry says its evidence is secondary, two counties are mid-process, and the counties recorded as not adopted have code that confines accessory dwellings to urban growth boundaries or carries no rural provision. Absence from the adopted list means not confirmed rather than confirmed absent. A 2026 bill, SB 1578, proposed raising the statute's 900 square foot limit to 2,500; it was still in the Senate Committee on Housing and Development when the session ended, so the 900 square foot limit stands.

Last verified September 9, 2026 · source