Ada County, ID Fence Regulations: Neighbor Fence Rules (2026)
Key Facts
- Boundary fence allowed
- Up to 6 feet on line
- Corner visibility
- Clear-vision triangle protected
- Maintenance
- Required screening kept in repair
- Cost sharing
- Private civil matter
- Code section
- Ada County 8-3-6(B),(G)
Summary
Ada County zoning lets a six-foot fence sit on the perimeter boundary between neighbors, but any sight-obscuring fence near a street corner must not block the clear-vision triangle. Cost-sharing and exact placement of a shared boundary fence are private matters under Idaho civil law.
Clear Vision Triangle. No sight-obscuring fence, hedge, wall, latticework, or screen shall violate the clear vision triangle requirements (see definition in Chapter 10) at a street intersection.
Full Breakdown
Ada County Code Section 8-3-6(E) permits perimeter-boundary fences up to six feet above grade, so a fence may sit on the shared property line between adjoining owners. Section 8-3-6(B) prohibits any sight-obscuring fence, hedge, wall, latticework, or screen that violates the clear-vision-triangle requirements at a street intersection. Section 8-3-6(G) requires that any sight-obscuring fence required by Title 8 to protect adjacent properties be maintained in good repair. The county code does not allocate cost or ownership of a shared fence; those disputes are resolved between neighbors under Idaho civil law, not by Development Services.
Violations & Fines
A boundary fence blocking a clear-vision triangle or a required screening fence left in disrepair is a zoning violation; private line disputes are civil, not county-enforced.
Frequently Asked Questions
Can I put a fence on the shared property line?
Who pays for a shared boundary fence?
Sources & Official References
Other rules in Ada County
Compare Ada County to another location·View the Idaho fence regulations overview
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