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Adams County, CO Fence Regulations: Material Restrictions (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified July 2026

Key Facts

Barbed wire
Permitted; 4 strands in top 18 in.
Barbed-wire-only fence
Permitted
Electric boundary fence
Conditional Use Permit required
Masonry walls
Must be brick or stone
Chain-link screen inserts
90% opacity minimum

Summary

Adams County permits barbed wire fencing and allows up to four strands of barbed wire in the top 18 inches of a fence. External boundary electric fences require a Conditional Use Permit. Masonry screen walls must be brick or stone.

City-specific rules exist: Thornton, and Westminster have their own material restrictions rules that differ from Adams County's county-level regulations. If you live in one of those cities, check the city-specific page instead.

Fencing consisting of only barbed wire is permitted.

Full Breakdown

Adams County DSR 4-06-01-02-01-01 allows the top 18 inches of a fence to include four strands of barbed wire, and DSR 4-06-01-02-01-02 states fencing consisting of only barbed wire is permitted (reflecting the county's agricultural character). An external boundary electric fence requires a Conditional Use Permit. Masonry screen walls must be constructed of brick or stone that fully conceals the contents inside. Land under development may be enclosed by a chain-link or solid wood fence. Where screen fencing is required and an existing chain-link fence is reused, PVC/vinyl inserts achieving at least 90% opacity must be installed.

Violations & Fines

Using prohibited materials, installing an electric boundary fence without a CUP, or failing to meet opacity/screening material rules are zoning violations subject to enforcement.

Frequently Asked Questions

Is barbed wire allowed on fences in unincorporated Adams County?
Yes. Up to four strands of barbed wire are allowed in the top 18 inches of a fence, and a fence consisting only of barbed wire is permitted.
Can I install an electric fence?
An external boundary electric fence is allowed only with a Conditional Use Permit approved by the county.

Sources & Official References

Other rules in Adams County

All Adams County rules

Compare Adams County to another location·View the Colorado fence regulations overview

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Material Restrictions in Cities Across Adams County