Solar installations in Contra Costa County, CA
103,567 recorded installations in Contra Costa County, California — 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 Contra Costa County by installer, size, date and equipment.
Search sites →Independent check:Stanford's DeepSolar detected about 61,495 solar arrays here from 2018 satellite imagery — our recorded data covers roughly 168% of that. A yardstick, not dated records.
Most active
Top installers in Contra Costa County
| # | Installer | Installs here |
|---|---|---|
| 1 | Tesla | 16,348 |
| 2 | Sunrun | 15,730 |
| 3 | Sunpower | 6,739 |
| 4 | West Coast Solar | 2,766 |
| 5 | Bright Ops | 2,605 |
| 6 | Citadel Roofing And Solar | 2,464 |
| 7 | Petersendean | 2,143 |
| 8 | Freedom Forever | 1,929 |
| 9 | Semper Solaris | 1,678 |
| 10 | Diablo Solar Services | 1,497 |
Growth
Installations by year
Frequently asked questions
How many homes have solar in Contra Costa County?
PanelCensus records 103,567 solar installations in Contra Costa County, California (1.2 GW of capacity) — about 24.3% of the county's 426,585 housing units (U.S. Census ACS). Dataset coverage depends on California's reporting programs, so the true total is higher.
How much does solar cost in Contra Costa County?
The median installed price for recorded systems in Contra Costa County is $4.37/W pre-incentive; the median system runs 5.9 kW.
Who installs solar in Contra Costa County?
The most active recorded installers in Contra Costa County are Tesla, Sunrun, Sunpower.
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.