Accessory Structures in Corvallis, OR (2026)
2 verified accessory structures rules for Corvallis, Oregon, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Corvallis allows one accessory dwelling unit per lot under Land Development Code Section 4.9.40, capping ADU floor area at 900 square feet or 85 percent of the primary home's floor area, whichever is smaller, with no minimum lot size and relaxed front-yard setbacks.
Corvallis Accessory Dwelling Unit Rules
Some RestrictionsCorvallis Land Development Code § 4.9.40
Accessory Dwelling Units, hereafter called ADUs, are subject to the standards listed below: a.The subject property is required to be a legally created lot, parcel, or lot of record that contains, or is proposed to contain via an active building permit, a dwelling unit or dwelling units. There is no minimum lot area or width required in order to develop an ADU.b.The ADU must not exceed 900 squar...
Shed & Carport Rules
In the City of Corvallis, a shed counts as an Accessory Structure, and Land Development Code Section 4.3.40 names sheds outright as a permitted type in every zone that allows residential use, alongside garages, gazebos, and barns. A shed cannot include a bedroom or sleeping room and must sit detached from the house, and Section 4.3.30 caps its height at 14 feet and its footprint at 35 percent of the required yard it occupies.
Corvallis Backyard Shed Rules and Limits
Some RestrictionsCorvallis Land Development Code § 4.3.40
a.Accessory Structures must not have bedrooms or sleeping rooms except for detached ADUs built in accordance with the ADU standards of LDC Section 4.9.40. Accessory Structures must be detached from the primary residence, except for decks.b.Subject to the restrictions and limitations specified in this Code, the following types of Accessory Structures shall be permitted in zones where Residential...
Looking for Benton County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Corvallis city rules.
Accessory Structures in Benton County →