Solar installations in King County, WA
2,056 recorded installations in King County, Washington — capacity, prices and the installers doing the work.
Dataset updated . Sources: LBNL Tracking the Sun + city permit records + state programs + USGS/EIA utility-scale.
Search every recorded installation in King County by installer, size, date and equipment.
Search sites →Independent check:Stanford's DeepSolar detected about 11,694 solar arrays here from 2018 satellite imagery — our recorded data covers roughly 18% of that (this county is under-reported in public program data). A yardstick, not dated records.
Most active
Top installers in King County
| # | Installer | Installs here |
|---|---|---|
| 1 | Freedom Forever | 1 |
| 2 | Delta Electric | 1 |
Growth
Installations by year
Frequently asked questions
How many homes have solar in King County?
PanelCensus records 2,056 solar installations in King County, Washington (19.3 MW of capacity) — about 0.21% of the county's 988,330 housing units (U.S. Census ACS). Dataset coverage depends on Washington's reporting programs, so the true total is higher.
How much does solar cost in King County?
The median installed price for recorded systems in King County is $3.41/W pre-incentive; the median system runs 8.5 kW.
Who installs solar in King County?
The most active recorded installers in King County are Freedom Forever, Delta Electric.
County assignment is derived from installation ZIP codes via the Census 2020 ZCTA↔county crosswalk (primary county by land-area overlap) — approximate at county boundaries. Market penetration = recorded installations ÷ housing units (U.S. Census Bureau ACS 5-Year, Table B25001); it undercounts where dataset coverage is partial. See methodology.