Building Setbacks & Zoning in Clackamas County, OR (2026)
3 rules for unincorporated Clackamas County, Oregon.
Verified from official government sources
Setback Rules
Setbacks vary by zoning district. In urban low-density residential (R-5 to R-30) the ZDO requires a 15-foot front setback (20 ft to a garage), 20-foot rear, and 5-foot side. Rural RA-2 and farm EFU lots require 30-foot front/rear and 10-foot side.
Building Setbacks in Unincorporated Clackamas County
Some RestrictionsClackamas County ZDO 315, Table 315-2
Minimum Front Setback: 15 feet, except 20 feet to garage and carport motor vehicle entries. Minimum Rear Setback: 20 feet. Minimum Side Setback: 5 feet.
Structure Height Limits
In the urban low-density residential districts, the ZDO caps most buildings, including accessory dwelling units, at 35 feet. Large accessory buildings (over 500 sq ft) accessory to a home are limited to 20 feet or the height of the primary dwelling, whichever is greater.
Building Height Limits in Clackamas County
Some RestrictionsClackamas County ZDO 315, Table 315-2
Maximum Building Height: Accessory buildings larger than 500 square feet and accessory to a primary dwelling, except accessory dwelling units: 20 feet or the height of the primary dwelling, whichever is greater. All other buildings, including accessory dwelling units: 35 feet.
Lot Coverage Limits
In the urban low-density residential districts (R-2.5 to R-30), the ZDO limits maximum lot coverage to 50 percent. In a planned unit development, maximum lot coverage rises to 65 percent.
Lot Coverage Limits in Clackamas County
Some RestrictionsClackamas County ZDO 315, Table 315-2
Maximum Lot Coverage: 50 percent. [Footnote:] Maximum lot coverage in a planned unit development is 65 percent.
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