Accessory Structures in Eugene, OR (2026)
2 verified accessory structures rules for Eugene, Oregon, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Eugene allows one accessory dwelling per lot in every residential zone under EC 9.2751(17), capping an attached ADU at 10 percent of the lot area or 800 square feet, whichever is smaller. Within 60 feet of the front lot line it needs only a 5-foot interior setback; height then follows the main house's limit under Table 9.2750.
Eugene Accessory Dwelling Unit Rules
Some RestrictionsEC 9.2751(17)
(17) Accessory Dwellings. (a) General Standards for Attached Accessory Dwellings. Except as provided in subsection (c) below, attached accessory dwellings shall comply with all of the following: 1. Building Size. The total building square footage of an accessory dwelling shall not exceed 10 percent of the total lot area or 800 square feet, whichever is smaller. Total building square footage is ...
Shed & Carport Rules
Eugene caps accessory buildings, sheds, detached garages and workshops, at 10 percent of the lot area under EC 9.2751(16), with a tighter 400-square-foot limit inside the Amazon, Fairmount and South University neighborhoods. Interior yard setbacks start at 5 feet and slope back once the wall passes 8 feet, capping most sheds at 25 feet.
Eugene Shed and Accessory Building Rules
Some RestrictionsEC 9.2751(16)
(16) Accessory Buildings in R-1. (a) General Standards. Except as provided in subsection (b) below, the following standards apply to all new accessory buildings: 1. Building Size. The maximum square footage of all accessory buildings shall not exceed 10 percent of the lot area, except that accessory buildings on development sites larger than one acre (43,560 square feet) may exceed that maximum...
Looking for Lane County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Eugene city rules.
Accessory Structures in Lane County →