Fence Regulations in Mason County, WA (2026)
2 rules for unincorporated Mason County, Washington.
Verified from official government sources
Height Limits
Unincorporated Mason County's zoning definitions set the working fence height line at seven feet: a fence of that height or less is not a regulated "structure" and does not trigger the setbacks other structures must meet. Taller fences, and fences in specific overlay districts, face separate limits under the Mason County Code.
Fence Height Limits in Unincorporated Mason County, WA
Some RestrictionsMason County Code § 17.06.010
"Structure" means anything constructed in the ground, or anything erected which requires location on the ground, or is attached to something having location on or in the ground, but not including fences or signs seven feet or less in height, driveways, or other paved areas.
Retaining Walls
In unincorporated Mason County, retaining walls come with their own permit track: Mason County Code § 14.44.050(b)(2) only exempts wall-footing excavation from a grading permit when a valid building permit already covers the wall, and § 14.44.150(c) requires a separate permit and fee for the wall itself, layered on top of standard grading review fees administered by Community Development.
Mason County Retaining Wall Permits and Grading Fees
Some RestrictionsMason County Code §§ 14.44.050(b)(2), 14.44.150(c)
(2)An excavation below finished grade for basements and footings of a building, retaining wall or other structure authorized by a valid building permit. This shall not exempt any fill made with the material from such excavation or exempt any excavation having an unsupported height greater than five feet after the completion of such structure provided the excavation does not impact properties ou...
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