Peoria, AZ Fire Regulations: Wildfire Zones (2026)

2, giving the Fire Code Official authority to classify land as Wildland/Urban Interface. Once an area carries that classification, development there must meet the 2018 International Urban-Wildland Interface Code (IUWIC), a separate model code Peoria has adopted specifically for its desert-edge terrain rather than folding wildfire rules into the base fire code. 7, the fire apparatus access road grade standard, to layer on three conditions once a road's grade tops 10%: the structures it serves need a full automatic fire sprinkler system meeting the 2018 IFC and Peoria's local amendments, the development has to meet the 2018 IUWIC generally, and the buildings must be built to at least Class 1 Ignition Resistant Construction as defined in IUWIC Section 504.

6 requires Group R occupancies in a designated Urban-Wildland Interface Area to comply with the 2018 IUWIC and directs staff to Table 9-33(d) to size specific fire-service features, such as access grades, to the parcel. Together these provisions mean a builder in Peoria's steep, brush-adjacent terrain north toward the Yavapai County line faces construction and access standards well beyond a standard subdivision, decided case by case by the Fire Code Official rather than by a fixed citywide map.