Historic Preservation in Maricopa County, AZ (2026)

2 county-level rules, plus city-specific rules for 1 city in Maricopa County, Arizona.

Verified from official government sources

Note: These county rules apply to unincorporated areas of Maricopa County. If you live within an incorporated city, that city's own rules apply — see the city list below.

Historic-Cultural Monuments

Maricopa County Historic Preservation Office oversees county-owned historic properties, while Arizona State Parks Board administers the Arizona Register of Historic Places. Local landmark designations come from cities like Phoenix Historic Preservation Commission and Scottsdale HPC.

County Historic Program And State Listings

Some Restrictions

Full ordinance details →Official source ↗

Mills Act Contracts

Arizona has no Mills Act program. Instead, ARS Section 42-12101 creates a Historic Property Tax classification that reduces full-cash value by 50 percent for qualifying owner-maintained historic homes in Maricopa County and statewide for 15 years renewable.

Arizona Has No Mills Act, Uses Property Tax Class

Few Restrictions

Full ordinance details →Official source ↗

Historic Preservation by City in Maricopa County

1 cities in Maricopa County have their own historic preservation rules. Each link goes to that city's dedicated page with code citations.

PhoenixPop. 1,608,139

3 verified rules • Historic-Cultural Monuments, HCM Demolition Controls

All Maricopa County ordinances

See every category we cover for Maricopa County — parking, noise, fences, fires, animals, pools, and more.

Maricopa County Ordinance Hub →