Accessory Structures in Gresham, OR (2026)
4 verified accessory structures rules for Gresham, Oregon, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Gresham allows accessory dwelling units (ADUs) in residential zones per Oregon state law (HB 2001). One ADU is permitted per lot. ADUs must meet development code standards for size, setbacks, and parking.
Gresham ADU / Accessory Dwelling Unit Rules
Some RestrictionsShed Rules
Small sheds under 200 square feet generally do not require a building permit in Gresham. Larger structures require permits and must meet setback requirements from the Development Code.
Gresham Shed & Outbuilding Rules
Few RestrictionsGarage Conversions
Garage conversions in Gresham require building permits and must meet building code for habitable space. Converting a garage to living space may be treated as an ADU under Oregon law.
Gresham Garage Conversion Rules
Some RestrictionsCarport Rules
Gresham Community Development Code Section 7.0420 (Design Standards for Single Detached, Duplex, Triplex and Quadplex) treats carports as accessory structures that face the street. Attached and detached garages and carports facing the street may not exceed 50 percent of the street frontage, must be set back at least 4 feet behind the street-facing wall closest to the street, and the front-yard driveway width is limited to the carport width. Building permits are administered under the Oregon Residential Specialty Code.
Carport Rules in Gresham
Some RestrictionsLooking for Multnomah County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Gresham city rules.
Accessory Structures in Multnomah County →