Ada County, ID Solar Energy: Panel Permits (2026)

Ada County Code classifies a home solar array as a "Distributed Power Facility, Solar Facility" in Table 8-2-23-2, coded "A1" in every zoning district, meaning it is allowed only as an accessory use tied to a principal use on the same lot and needs a Zoning Certificate under Section 8-6-32. The application goes to the Director (Section 8-6-32(B)); the Director then approves, denies, or approves with conditions (8-6-32(E)(1)). " Under Section 8-6-32(H)(1), no construction or alteration may begin until the certificate is issued. 5') from the property line for every one foot (1') of height, or the district's minimum setback, whichever is greater; ground-mounted equipment need only meet the district's standard minimum setback.

All panels, roof, pole, or ground, must be built to minimize glare or reflection onto adjacent properties and roadways and cannot interfere with vehicle or air traffic or create a safety hazard for people or wildlife. Larger, utility-scale ground arrays reviewed as a Centralized Power Facility fall under a different track (Section 8-4-54(C)(2)(c)) requiring a ten-acre minimum lot and conditional use approval; that path does not apply to a typical residential rooftop or backyard system.