Phoenix Building Construction Code Chapter 11 (energy provisions) and amendments to the 2018 IECC require new low-slope roofs to meet cool-roof reflectance and emittance thresholds. Phoenix participates in the Cool Roof Coalition with ASU and EPA SmartGrowth.
Phoenix amended the 2018 International Energy Conservation Code (IECC) to require cool-roof products on most new low-slope commercial roofs. Roofs with slopes of 2:12 or less must use products with a three-year aged solar reflectance of at least 0.55 and thermal emittance of at least 0.75, or meet a Solar Reflectance Index of about 64. Steep-slope residential roofs are encouraged but not required to meet cool-roof minimums. Phoenix Planning and Development verifies compliance through plan review with Cool Roof Rating Council documentation. Phoenix is a founding member of the regional Cool Roof Coalition with Arizona State University, EPA, and Maricopa County, advancing voluntary upgrades on existing buildings through education and rebates.
Permits not meeting cool-roof requirements are denied at Phoenix Planning and Development plan-check. Roofs installed without compliant materials may require removal and replacement plus re-inspection fees, and ongoing code-enforcement follow-up if discovered after issuance.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
Phoenix, AZ
The Phoenix Climate Action Plan, adopted in 2021 and updated 2023, sets a citywide goal of carbon neutrality by 2050 with interim targets of 50 percent emiss...
Phoenix, AZ
The Phoenix Heat Action Plan, adopted 2023, targets 25 percent tree-canopy coverage citywide, expands cool pavement and cool roofs, opens cooling centers dur...
Phoenix, AZ
Phoenix has adopted the International Green Construction Code (IgCC) as a voluntary overlay through Chapter 10. Mandatory provisions appear in cool-roof and ...
Side-by-side rule comparisons with other cities in Maricopa County.
See how other cities in Maricopa County handle cool roof requirements.
See how Phoenix's cool roof requirements rules stack up against other locations.
Quick Compare
Help us keep this page accurate. If you notice an error or outdated information, let us know.