Residential and commercial solar PV in Yakima is permitted through the Code Administration Division under YMC Title 11 (Building Code) — which adopts the Washington State Building Code (WAC 51-50 IBC, WAC 51-51 IRC, WAC 51-54 IFC, and WAC 51-56/57 plumbing/mechanical) as state law requires under RCW 19.27. The state Energy Code (WAC 51-11C / 51-11R) is also adopted by reference. Yakima publishes a Residential Solar Photovoltaic Building Permit checklist through Code Administration that streamlines roof-mount applications. Electrical work is permitted and inspected separately by Washington Labor & Industries under RCW 19.28 and Chapter 296-46B WAC.
Solar PV permitting in Yakima is administered by Code Administration in the Community Development Department (129 N. 2nd Street, 2nd Floor). YMC Title 11 adopts the Washington State Building Code as required by RCW 19.27.031 — Yakima cannot impose code requirements stricter than the state code for residential structures (RCW 19.27.040 preemption). The combined submittal package for a typical roof-mount residential PV system includes: site plan showing the structure and panel array footprint, electrical one-line diagram, structural information for the mounting system (manufacturer's UL-listed racking with engineering data showing the existing roof framing supports the additional dead load and wind/snow uplift), and manufacturer specifications for the modules, inverters, rapid-shutdown device, and disconnects. The plumbing/mechanical code (WAC 51-56/57) controls for solar thermal water-heating systems. Inspections include a rough framing check where applicable, a final structural inspection, and final fire-marshal sign-off for rapid-shutdown and access pathways under WAC 51-54 (Washington State Fire Code, with IFC 1204/2024 IFC equivalent for solar). The electrical permit and inspection are issued by Washington State Department of Labor & Industries under RCW 19.28 and Chapter 296-46B WAC, NOT by the city — that includes the PV inverter, conductors, combiner, disconnect, and meter-side work. Interconnection is governed by the Washington UTC Net Metering rule under Chapter 480-108 WAC for utilities that meet the threshold; Pacific Power (Yakima's serving utility) administers net-metering applications. Local fees are limited to the city's actual cost recovery under RCW 19.27.085.
Installing solar PV without a building permit violates YMC Title 11 and the State Building Code Act, RCW 19.27. The city may issue a Stop Work order, require after-the-fact permitting (typically at doubled fees), and refuse the final inspection until brought into compliance. Energizing an unpermitted electrical system violates RCW 19.28 and is enforceable by Labor & Industries with civil penalties up to $10,000 per violation under RCW 19.28.131. Interconnecting an unapproved generator with the Pacific Power distribution system violates the WAC 480-108 net-metering rule and the utility tariff and can result in service disconnection.
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Yakima, WA
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