Or. Rev. Stat. § 197A.421 – Additional accessible or affordable middle housing units

(1) As used in this section:
1. (a) “Accessible unit” means a unit of housing that complies with the “Type A” requirements applicable to units as set forth in the Standard for Accessible and Usable Buildings and Facilities published by the International Code Council and as referenced by the state building code.
2. (b) “Affordable unit” means a unit of housing that is subject to an affordable housing covenant, as described in ORS 456.270 to 456.295, that:
  1. (A) Makes the unit available to purchase for a maximum sales price and requires that the unit be purchased by a household with an income below 120 percent of median income, with both the maximum price and income threshold as published per region on an annual basis by the division of the Oregon Department of Administrative Services that serves as office of economic analysis; and
  2. (B) Is enforceable for a duration of not less than 10 years from the date of the certificate of occupancy.
(2) The definitions in ORS 197A.420 apply to this section.
(3) On any lot or parcel on which middle housing may be sited under ORS 197A.420 (2) or (3), except for urban unincorporated land not within Metro, if one or more of the units of middle housing is an accessible or affordable unit, a city shall allow, subject to ORS 197A.420 (5), the additional development of:
1. (a) For any allowable duplex or triplex, one additional attached or detached dwelling unit, resulting in a triplex or quadplex.
2. (b) For any allowable townhouse, quadplex or cottage cluster, up to two additional attached or detached dwelling units, resulting in additional townhouse or cottage cluster units or attached or detached five-unit or six-unit developments.
(4) The additional units under this section are subject to the regulations under ORS 197A.420 (5), except that a city must allow commensurate increases to the developable area, floor area, height or density requirements to allow for the development of the units.
(5) This section does not limit a local government from enacting density bonuses that provide a greater number of accessible or affordable units, or housing that is affordable to more families, than required by this section.

[2025 c.476 §3]