A bill for an act relating to the siting and operation of renewable electric power generating facilities, and including retroactive applicability provisions.

HF 2257 sets new rules for where and how renewable energy facilities (like wind turbines, solar farms, and battery storage systems) can be built in Iowa. It requires local governments to follow specific minimum distances from homes, community buildings, roads, and other properties - such as 2 times a wind turbine's height from occupied homes or 50 feet from nonparticipating property for solar. The bill also limits noise (max 47 decibels) and shadow flicker (max 30 hours/year) near residences, while requiring facilities to meet national safety and fire codes. These rules apply to all new renewable projects proposed after January 1, 2026, directly affecting developers, local zoning boards, and nearby property owners.