How much does solar panel installation cost in Seattle?
In Seattle, WA, a solar panel installation typically costs $18,900–$30,700 for a typical 7 kW system (cash price). A residential solar system is priced mainly by size in kilowatts, plus panel and inverter quality and whether you add battery storage. The 30% federal tax credit for homeowner-owned systems ended on December 31, 2025, so today the cash price is closer to what you actually pay, unless you lease or sign a power purchase agreement.
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Cost by system size (cash price) in Seattle
These ranges are adjusted for Seattle labor and permit costs:
| Type | Seattle price range |
|---|---|
| Small (5 kW) | $14,150–$23,600 |
| Average (7 kW) | $18,900–$30,700 |
| Large (10 kW) | $25,950–$42,500 |
Estimates for 2026; actual quotes vary by home, scope, and contractor. Always get written bids.
How we estimate: Ranges are typical national project costs from public contractor-pricing and industry references (e.g. RSMeans-style cost data and HomeAdvisor/Angi-type surveys), adjusted by a local cost-of-construction index for each city. See our methodology.
What drives solar panel installation cost
- System size (kW): Bigger systems cost more up front but offset more of your electric bill — sizing to your usage matters.
- Equipment quality: Premium panels and inverters (and microinverters) cost more but produce more and last longer.
- Roof type & complexity: Steep, multi-plane, tile, or shaded roofs raise the install labor.
- Battery storage: Adding a home battery for backup or time-of-use savings adds several thousand dollars.
- Incentives & ownership: The federal residential solar credit (Section 25D) ended for systems installed after 2025. Leases and power purchase agreements can still pass a business tax credit through as a lower monthly price; local utility rebates vary.
Seattle cost factors
Seattle's wet climate makes roofing, siding, and drainage especially important, and its strong economy keeps labor well above the national average. Washington permitting and energy codes add to the cost of most home projects.
Frequently asked questions
How much does solar panel installation cost in Seattle?
A typical 7 kW residential solar system in Seattle runs about $18,900–$30,700 if you buy it outright. The 30% federal homeowner tax credit ended after 2025, so any savings now come from local utility rebates or from leasing instead of buying.
Is home solar worth it?
Solar pays back best where electricity is expensive and sun exposure is good; payback periods commonly land in the 6–12 year range, after which the power is essentially free.
How long does a solar installation take?
The rooftop install is usually 1–3 days, but permitting and utility interconnection can stretch the full timeline to several weeks.
Is there still a federal tax credit for solar?
Not for homeowners who buy their system. The 30% residential clean energy credit (Section 25D) ended for systems installed after December 31, 2025. Leased and PPA systems are owned by the installer, who may still claim a business credit and pass part of it on. Confirm current rules with a tax professional.
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Published 2026-06-16, updated 2026-10-20. Cost ranges are general 2026 estimates for guidance only, not quotes. Get written bids from licensed local contractors. See how we estimate and about us.