Fence Regulations in Clackamas County, OR (2026)
3 rules for unincorporated Clackamas County, Oregon.
Verified from official government sources
Height Limits
In unincorporated urban residential Clackamas County, fences and sight-obscuring plantings may reach 6 feet at or behind the front building line, but only 4 feet forward of it (toward the street). Inside cities, the city's code applies.
Clackamas County Fence Height Limits
Some RestrictionsClackamas County ZDO 315, Table 315-3
Maximum Height for Fences and Sight-Obscuring Plantings: 6 feet at or behind the building line of the dwelling closest to front lot line(s)... or 4 feet forward of the building line of the dwelling closest to front lot line(s).
Fence Permit Requirements
Clackamas County treats fences as regulated structures under its Building Code chapter, meaning fence construction on unincorporated land goes through the same application, review and permit process as other building work. The Building Official can require plans, charge fees, and inspect the work before it is approved.
Fence Permit Rules in Clackamas County
Some RestrictionsClackamas County Code § 9.02.020(E)
This chapter shall apply to the construction, reconstruction, alteration, relocation (i.e. moving), demolition, repair, maintenance and work associated with any building or structure except when such work is located in a public right of public way. Without limiting the generality of the foregoing, this chapter shall also apply to the following: ... E. Fences.
Retaining Walls
Retaining walls are a permitted accessory use in unincorporated Clackamas County residential districts, but taller walls require a building permit and engineering under the Oregon structural/residential code, and all walls must respect corner-vision and setback standards.
Retaining Wall Rules in Clackamas County
Some RestrictionsClackamas County ZDO 315, Table 315-1
Fences and Retaining Walls [listed as] P [permitted primary/accessory use in the urban residential zoning districts].
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