Accessory Structures in Springfield, OR (2026)
3 verified accessory structures rules for Springfield, Oregon, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
In the City of Springfield, Oregon, Development Code section 3.2.275 lets a homeowner add an accessory dwelling unit by converting a garage or attic, adding floor area, or building detached, on any R-1 lot with a primary home and on R-2 and R-3 lots that meet size thresholds; every ADU is capped at 800 square feet or the primary home's size, whichever is smaller.
ADU Rules in Springfield, Oregon
Some RestrictionsSpringfield Development Code § 3.2.275
3.2.275. Accessory Dwelling Unit (ADU). ... (B) An accessory dwelling unit may be established by: (1) Converting an attic, basement, or garage or any other portion of the primary dwelling; (2) Adding floor area to the primary dwelling, including a second story; (3) Constructing a detached accessory dwelling unit on a lot or parcel with a primary single unit dwelling; or (4) Converting an existi...
Shed & Carport Rules
In the City of Springfield, Oregon, Springfield Development Code section 4.7.360 caps an accessory structure such as a shed, detached garage or workshop at 1,500 square feet of floor area in a residential district and 25 feet of building height, and bars a kitchen or an unpermitted wet bar inside it.
Springfield Accessory Structure Size Limits
Some RestrictionsSpringfield Development Code § 4.7.360(C), (D)
4.7.360. Accessory Uses and Structures. Accessory uses and structures are those of a nature customarily incidental and subordinate to the primary use or structure on the same lot. Typical accessory structures include detached garages, sheds, workshops, greenhouses, and similar structures. This section does not apply to accessory dwelling units (ADUs). ... (C) Floor Area. The maximum floor area ...
Garage Conversions
In the City of Springfield, Oregon, Development Code section 3.2.275(B)(1) lets a homeowner convert a garage into an accessory dwelling unit as one of four ways to create an ADU. A converted garage skips the design-matching standards in section 3.2.275(G) unless building or fire code forces an exterior change, but it must still meet every numeric development standard that applies to a new ADU.
Garage Conversion Rules in Springfield, OR
Some RestrictionsSpringfield Development Code § 3.2.275(B), (F), (G)
3.2.275. Accessory Dwelling Unit (ADU). ... (B) An accessory dwelling unit may be established by: (1) Converting an attic, basement, or garage or any other portion of the primary dwelling; ... (F) Development Standards. An accessory dwelling unit must meet the following standards: (1) The accessory dwelling unit must meet all applicable clear and objective standards in this code that apply to t...
Looking for Lane County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Springfield city rules.
Accessory Structures in Lane County →