King County, WA solar installation & market data
Updated December 3, 2020Older data · growth withheld By The SolarDNA Data Team
King County has 1,865 solar installations across 77 zip codes at a median installed cost of $3.42/W, recent growth not yet measurable, and an installs-weighted Market Score of 44.
Active installations
1,865
Zip markets
77
Median cost
$3.42/W
12-mo growth
—
Installers active
2
County Market Score
Good · installs-weighted across 77 zips
Best zip in King County scores higher than 76% of U.S. zip markets.
Versus Washington
How King County compares with the state
Installed cost
$0.03/W below
state median $3.45/W
Market score
44 vs 39
Washington scores 39
Share of state installs
25.05%
of 7.4K tracked statewide
Battery attach
0.0%
state 0.0%
Statewide momentum
▼ 13.4%
residential solar added in Washington, 12 months through Jul 2026
Statewide market
61.6K systems
3.1% of homes · utility-reported through Jul 2026
Growth & pricing
King County by year
1,263 installs in the trailing twelve months vs 563 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in King County
Summed across every zip in the county
| # | Installer | Installs | 12-mo | Zips | $/W |
|---|---|---|---|---|---|
| 1 | DELTA ELECTRIC | 1 | 0 | 1 | $10.94 |
| 2 | FREEDOM FOREVER | 1 | 0 | 1 | $4.50 |
Zip markets
Zips in King County
Ranked by installations · click for the zip market
| Zip | Installs | $/W | Score |
|---|---|---|---|
| 98070 | 80 | $3.64 | 43 C |
| 98115 | 77 | $3.34 | 44 C |
| 98103 | 72 | $3.65 | 43 C |
| 98040 | 68 | $3.05 | 46 B |
| 98177 | 56 | $3.37 | 44 C |
| 98118 | 54 | $3.25 | 45 C |
| 98052 | 54 | $3.15 | 45 C |
| 98117 | 52 | $3.81 | 42 C |
| 98034 | 49 | $3.77 | 42 C |
| 98033 | 46 | $3.52 | 43 C |
| 98105 | 45 | $3.48 | 43 C |
| 98155 | 44 | $3.56 | 43 C |
| 98144 | 42 | $3.29 | 44 C |
| 98116 | 42 | $3.41 | 44 C |
| 98125 | 41 | $3.38 | 44 C |
| 98112 | 41 | $3.92 | 41 C |
| 98133 | 41 | $3.52 | 43 C |
| 98136 | 34 | $3.29 | 44 C |
| 98028 | 33 | $3.33 | 44 C |
| 98122 | 32 | $3.57 | 43 C |
| 98006 | 32 | $3.28 | 44 C |
| 98108 | 31 | $3.05 | 45 C |
| 98038 | 31 | $3.33 | 44 C |
| 98146 | 30 | $3.49 | 43 C |
| 98008 | 29 | $3.22 | 45 C |
| 98106 | 28 | $3.25 | 44 C |
| 98126 | 28 | $3.72 | 42 C |
| 98199 | 28 | $3.08 | 45 C |
| 98092 | 28 | $3.69 | 42 C |
| 98074 | 27 | $3.19 | 45 C |
| 98166 | 26 | $3.13 | 45 C |
| 98029 | 25 | $2.87 | 46 B |
| 98022 | 24 | $3.68 | 42 C |
| 98053 | 22 | $3.18 | 45 C |
| 98107 | 22 | $3.26 | 44 C |
| 98059 | 21 | $3.22 | 44 C |
| 98168 | 21 | $3.62 | 43 C |
| 98072 | 21 | $3.54 | 43 C |
| 98023 | 20 | $3.95 | 41 C |
| 98042 | 20 | $3.84 | 42 C |
| 98011 | 20 | $3.39 | 44 C |
| 98027 | 18 | $2.66 | 47 B |
| 98178 | 18 | $3.61 | 43 C |
| 98056 | 18 | $3.21 | 45 C |
| 98119 | 17 | $3.32 | 44 C |
| 98102 | 16 | $3.74 | 42 C |
| 98075 | 16 | $3.10 | 45 C |
| 98058 | 15 | $3.39 | 44 C |
| 98004 | 15 | $3.18 | 45 C |
| 98030 | 14 | $3.54 | 43 C |
| 98001 | 14 | $3.31 | 44 C |
| 98031 | 14 | $3.45 | 43 C |
| 98019 | 13 | $3.30 | 44 C |
| 98109 | 12 | $3.67 | 42 C |
| 98003 | 11 | $3.55 | 43 C |
| 98198 | 11 | $3.14 | 45 C |
| 98055 | 10 | $3.71 | 42 C |
| 98188 | 10 | $3.75 | 42 C |
| 98045 | 9 | $3.46 | 43 C |
| 98007 | 9 | $3.38 | 44 C |
| 98002 | 8 | $4.38 | 39 C |
| 98065 | 7 | $3.06 | 45 C |
| 98057 | 6 | $3.46 | 43 C |
| 98050 | 6 | $2.84 | 46 B |
| 98032 | 6 | $3.56 | 43 C |
| 98051 | 5 | $3.71 | 42 C |
| 98014 | 4 | $2.95 | 46 B |
| 98010 | 4 | $3.72 | 42 C |
| 98005 | 4 | $3.17 | 45 C |
| 98148 | 3 | $3.04 | 45 C |
| 98101 | 3 | $4.28 | 39 C |
| 98039 | 3 | $3.50 | 43 C |
| 98024 | 3 | $2.89 | 46 B |
| 98134 | 2 | $3.64 | 42 C |
| 98114 | 2 | $4.47 | 39 D |
| 98035 | 1 | $2.71 | 47 B |
| 98068 | 1 | $3.33 | 44 C |