Maricopa County, AZ Sign Regulations: Window Signs (2026)
Key Facts
- Exempt window sign cap
- 2 square feet
- Allowed exempt messages
- "open/closed," "vacancy," "will return," "no smoking"
- Governing section
- MCZO § 1101, Exemptions (All Zoning Districts)
- Applies to
- Unincorporated Maricopa County only
- Over the cap
- Loses exemption, needs standard sign permit
Summary
Small interior window signs are exempt from Maricopa County's sign rules in unincorporated areas, but the exemption is narrow: Section 1101 caps exempt "public service" window signs at two square feet and limits them to noncommercial messages like "open," "closed," "vacancy," or "will return." Anything larger, or commercial in content, falls under the full chapter's permit and area standards.
Exemptions [All Zoning Districts]: The following signs are permitted in all zoning districts and exempt from the regulations of this Chapter: ... 5. Public service signs, not exceeding two (2) square feet in area, placed in the interior of an establishment's building window or glass door, such as "open or closed," "vacancy," "will return," "no smoking," and other noncommercial messages; placed on the property; warning the public against trespassing, danger from animals, and road hazards.
Full Breakdown
Maricopa County Zoning Ordinance Section 1101, General Signage Regulations, lists seven categories of signs that are "permitted in all zoning districts and exempt from the regulations of this Chapter" in unincorporated county land. " A separate clause in the same exemption list covers signs "placed on the property; warning the public against trespassing, danger from animals, and road hazards," which are exempt regardless of location. Because the two-square-foot cap and the noncommercial-message condition are both written into the same sentence, a business cannot claim the exemption for a full-window advertisement, a sale banner, or any sign promoting a specific product or price; those remain subject to the chapter's general standards, including the area, height, and illumination limits set for the applicable commercial or industrial zoning district, and typically require a sign permit through the Planning and Development Department before installation.
The exemption applies only to unincorporated Maricopa County; a business inside Phoenix, Mesa, Scottsdale, or any other incorporated city or town in the county is governed by that city's own sign code, not Section 1101. The Zoning Ordinance took its current form under the version dated December 10, 2025.
Violations & Fines
A window sign that exceeds two square feet, or that carries a commercial rather than a "noncommercial" message, forfeits the Section 1101 exemption outright and becomes a regulated sign subject to the chapter's area, permit, and illumination standards for that zoning district. Unpermitted or oversized signs are handled through Maricopa County's standard zoning violation and abatement process, enforced by Planning and Development.
Frequently Asked Questions
Can I put an "open" sign in my storefront window without a sign permit in unincorporated Maricopa County?
Is there a size limit on exempt window signs in Maricopa County?
Can I hang a sale banner in my window under the same exemption?
Does this window-sign exemption apply if my business is in Phoenix or Scottsdale?
Sources & Official References
Other rules in Maricopa County
Compare Maricopa County to another location·View the Arizona sign regulations overview
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