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Solar Installation in Seattle, WA

Compare 6 local solar installation pros. Typical service: $18314–$25260.

Top Solar Installation Companies in Seattle

  1. 1.Omnidian

    4.2★ (603 reviews)

    4.2★ from 603 reviews

    +18005979127Website

  2. 2.SolTerra

    4.8★ (151 reviews)

    4.8★ from 151 reviews

    +12064621103Website

  3. 3.Puget Sound Solar

    4.9★ (95 reviews)

    4.9★ from 95 reviews

    +12067061931Website

  4. 4.Clean Energy Innovators

    5.0★ (50 reviews)

    5.0★ from 50 reviews

    +12069658666Website

  5. 5.NW Wind & Solar

    4.2★ (11 reviews)

    4.2★ from 11 reviews

    +12065876527Website

  6. 6.Powell Solar Systems

    5.0★ (1 reviews)

    5.0★ from 1 reviews

    +12069700030

Solar Installation Cost in Seattle

Local ranges, adjusted for area wage and cost-of-living data.

ServiceTypical range in Seattle
6 kW system, installed$18,314–$25,260/job
8 kW system, installed$24,376–$33,722/job
10 kW system, installed$30,438–$42,184/job

Solar Installation prices in Seattle run about 26% above the national average, based on what this trade earns in the metro area — so neighbouring cities in the same metro see similar rates.

Quotes on this page come from 6 companies serving Seattle, rated 4.7★ on average across 911 customer reviews.

Seattle Climate & Seasonal Timing

What Seattle's weather means for scheduling solar installation.

Last spring frost
March 5
First fall frost
November 24
Annual precipitation
37.72"
Heating degree days
4,370
Cooling degree days
188
MonthLowHighPrecip
Jan37.3°48.6°5.47"
Feb37.1°51.4°3.52"
Mar39.7°55.4°3.85"
Apr42.9°59.9°2.79"
May48.8°65.8°2.01"
Jun53.3°70.7°1.57"
Jul56.5°75.8°0.85"
Aug57°76.2°0.94"
Sep53.1°70.8°1.3"
Oct46.8°60.7°3.38"
Nov40.6°52.4°5.98"
Dec36°46.9°6.06"

NOAA station data 3.2 miles from Seattle.

Permits & Regulations in WA

Permit typically required

  • Electrical contracting requires an L&I electrical contractor license with an assigned administrator or master electrician
  • Anyone doing electrical work must hold an L&I electrician certificate or trainee certificate
  • Electrical work requires an L&I or city electrical permit

License required: Washington L&I electrical contractor license and certified electricians

Sources: lni.wa.gov

Solar Installation FAQs for Seattle

How much does solar cost in Seattle?

A 6 kW home solar system in Seattle typically runs $18314-$25260 installed, before any incentives.

How many solar installers serve Seattle?

We track 6 solar installation companies serving Seattle.

Is solar installation in Seattle more expensive than average?

Electrical installation labor in Seattle runs about +26.3% versus the national average.

Do I need a permit for solar panels in Seattle, WA?

In WA, Electrical contracting requires an L&I electrical contractor license with an assigned administrator or master electrician. Rooftop solar in Seattle needs a building and electrical permit plus a utility interconnection agreement.

Is there a federal solar tax credit in 2026?

No for homeowners buying a system: the residential federal credit ended December 31, 2025, so a Seattle quote of $18314-$25260 is close to the out-of-pocket cost unless a state or utility rebate applies.

How much does air conditioning drive solar savings in Seattle?

Seattle sees about 188 cooling degree days a year; the more air conditioning a home runs, the more of a solar systems output it uses directly.

How many quotes should I get for solar in Seattle?

At least three; with 6 installers serving Seattle, compare the price per watt, panel and inverter models, and the workmanship warranty.

Does heat reduce solar output in Seattle?

Slightly; panels lose efficiency on days near 76F, so Seattle quotes should use temperature-adjusted production estimates.