6 Best Solar Installers in Seattle for 2026

Seattle's solar market is more active than most people expect. The city gets fewer sunny days than Phoenix or Los Angeles, but modern monocrystalline panels perform well in diffuse light, and Washington State's net metering rules mean you can bank credits against your bill even during the gray winter months. Most homes in neighborhoods like Beacon Hill, Ballard, and the Central District have steeply pitched roofs suited to south- or southwest-facing installations, and many of the older craftsman bungalows in those areas are solid candidates for a 6 to 10 kilowatt residential system. Seattle City Light and Puget Sound Energy both have interconnection processes you'll need to complete before your system can go live, and a good local installer will handle that paperwork for you. Battery storage add-ons, particularly with panels from manufacturers like LG, Enphase, or SunPower, are increasingly common here, partly because of occasional grid outages tied to windstorms rolling off the Puget Sound. Typical residential installation costs in the greater Seattle area run roughly $15,000 to $30,000 before the federal investment tax credit, which currently lets you deduct 30% of the system cost from your federal taxes.

The businesses on this page were drawn from third-party business listings and ranked using a combination of public review rating and review count, with a small lift applied to businesses that show a working website and phone number. We check each business's homepage to confirm that solar installation is what they primarily offer, which is how unrelated trades get filtered out. Any listing flagged as permanently closed is removed automatically. Where you see a Trust Verified badge next to a business name, that company has additionally passed our full verification process, covering trade qualifications and accreditations, public liability insurance, trading history, customer review history, and registered company information. You can see the complete list of checks on our How We Verify page. Businesses without that badge have not been independently verified by us, and you should carry out your own checks before booking.

Before you sign a contract with any solar installer, ask to see a copy of their Washington State contractor's license and confirm they carry general liability insurance. Get at least three written quotes and make sure each one specifies the panel brand and model, inverter type, expected system output in kilowatt-hours per year, and whether the labor warranty is separate from the equipment warranty. Ask specifically who will be on your roof, because some installers subcontract the physical installation. Check whether the quote includes the Seattle permit fees, which typically run $500 to $1,000 depending on system size, and confirm the installer will handle the utility interconnection application. A reputable company will also give you a realistic shading analysis based on your specific roof and tree coverage, not just a generic online estimate.