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Arapahoe County, CO Sign Regulations: Digital Billboards (2026)

Significant Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified August 2026

Key Facts

Billboards
Prohibited in all districts
EMB brightness cap
0.3 foot-candles above ambient
Min. dwell time
1 minute between changes
EMB size cap
50% freestanding/25% wall, max 48 sq ft
Allowed zoning
B-3, B-4, B-5, I-1, I-2 only

Summary

Billboards are banned outright in every zoning district of unincorporated Arapahoe County, and that ban extends to digital versions: the Land Development Code specifically bars Electronic Message Boards from being used as billboards. Smaller electronic message signs are allowed only on other permitted sign types in commercial and industrial districts.

City-specific rules exist: Aurora, and Centennial have their own digital billboards rules that differ from Arapahoe County's county-level regulations. If you live in one of those cities, check the city-specific page instead.

iii. No electronic message board may exceed a brightness level of 0.3 foot-candles above ambient light... iv. Electronic Message Boards are not permitted for Billboards. v. The area of a permitted sign face that may be an Electronic Message Board shall not exceed: 1. Up to 50 percent or each permitted sign face on a Freestanding Sign; and 2. Up to 25 percent of each permitted sign face on a Wall Sign or Window Sign; up to a maximum of 48 square feet.

Full Breakdown

5). 3 foot-candles above ambient light. Size is capped too, up to 50 percent of a permitted freestanding sign face, or 25 percent of a wall or window sign face up to a maximum of 48 square feet, and EMBs can't be added to Top of Façade or Canopy signs. They're allowed only on otherwise-permitted signs in the B-3, B-4, B-5, I-1 and I-2 zoning districts, or in commercial/industrial PUD areas that don't separately prohibit them, and a legally nonconforming sign can never be converted into one.

Violations & Fines

A proposed billboard, digital or static, is automatically denied a sign permit anywhere in unincorporated Arapahoe County under §4-1.7.D.7. An Electronic Message Board installed outside the B-3/B-4/B-5/I-1/I-2 districts, exceeding the 0.3 foot-candle brightness cap, lacking the required dimming sensor, or converted from a nonconforming sign faces permit denial or removal by the County Building Inspector, with the same 30-day written-notice process that applies to other sign violations under §4-1.7.B.10.

Frequently Asked Questions

Can I put up a digital billboard in unincorporated Arapahoe County?
No. Billboard signs are prohibited in every zoning district under LDC §4-1.7.D.7, and the Electronic Message Board standards specifically state that Electronic Message Boards are not permitted for Billboards. A PUD also can't be approved to install a new billboard or convert an existing one into an electronic billboard.
What are the rules for a smaller electronic sign, like a gas station price display?
Under §4-1.7.F.6, an electronic message board on an otherwise-permitted sign must show a complete, static message for at least one minute before changing, dim automatically with ambient light, and stay under 0.3 foot-candles above ambient brightness. It can cover at most 50 percent of a freestanding sign face or 25 percent of a wall or window sign face, capped at 48 square feet.
Where are electronic message boards allowed?
Only on signs otherwise permitted in the B-3, B-4, B-5, I-1, and I-2 zoning districts, or in commercial and industrial areas of a Planned Unit Development that doesn't separately prohibit them. They can't be added to Top of Façade or Canopy signs, and a legally nonconforming sign can't be converted into one.

Sources & Official References

Other rules in Arapahoe County

All Arapahoe County rules

Compare Arapahoe County to another location·View the Colorado sign regulations overview

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