Solar Panel Cost in Washington
Estimated 2026 installed range: $12,800 – $17,900
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Open the calculatorCost by system type in Washington
| Option | Low | High |
|---|---|---|
| 4 kW (small home) | $12,800 | $17,900 |
| 6 kW (average home) | $19,200 | $26,900 |
| 8 kW (larger home) | $25,600 | $35,800 |
| 10 kW (high usage) | $32,000 | $44,800 |
| 12 kW+ (EV / all-electric) | $38,400 | $53,800 |
Local cost factors
Statewide drivers: West conditions and local labor rates. In Washington, wet soils and strict local health rules drive design costs.