Mason County, WA — Solar Development Risk Assessment

No Moratorium

No county-specific solar setbacks; standard agricultural zone setbacks apply; tribal consultation protocol for projects near Squaxin Island Tribal lands.

Mason County: CUP in Agricultural Resource and Rural zones; Mason County Planning Dept and Board of County Commissioners; Squaxin Island Tribe consultation where applicable.

Cautious/neutral — timber economy transitioning; Shelton area has some industrial development interest; Squaxin Island Tribe coordination adds process complexity; low irradiance limits economics

PSE and Mason County PUDs (No.1 and No.3) serve county; Squaxin Island Tribal Nation has energy sovereignty interests; Shelton is timber and port economy; Hood Canal shoreline triggers SMA; low irradiance (3.5 kWh/m²/day); county board neutral

Stable

Large facilities (≥350 MW): Washington EFSEC exclusive siting jurisdiction — state preempts local permitting. Projects <350 MW: county CUP or SUP in agricultural or resource-zoned land; no statewide preemption floor for smaller projects. SEPA review required for utility-scale; DNS/MDNS/EIS per county SEPA lead agency. GMA counties must address energy siting in comprehensive plans. SMA applies near shorelines. Critical Areas Ordinances: wetlands, fish habitat, flood zones require county CAO compliance. Agricultural land: county-specific farmland protection policies apply; prime farmland conversion may require additional findings.

Washington Clean Energy Transformation Act (CETA/SB 5116, 2019): IOUs must be carbon-neutral by 2030; 100% carbon-free by 2045. Net metering: ≤100 kW for IOU customers under WUTC; PUDs set individual limits, most allow up to 100% annual consumption offset. RESIP (Renewable Energy System Incentive Program): production incentives for systems ≤100 kW, utility-funded. Sales & use tax exemption: solar PV equipment fully exempt (RCW 82.08.962). Property tax exemption: solar systems excluded from assessed value (RCW 84.36.635). Community solar programs through PSE, SnoPUD, Tacoma Power, Clark Public Utilities, and most WA PUDs. PACE financing available in participating WA counties. Federal ITC: 30% (IRA 2022); low-income adder: 10% bonus ITC for qualifying community benefit projects.

Very limited utility-scale solar; some residential rooftop in Shelton and Union areas; Mason County PUD No.1 and No.3 have net metering programs.

No formal denials on record; limited developer activity.