Atherton, CA solar installation & market data
Updated May 13, 2026 By The SolarDNA Data Team
Atherton has 740 solar installations across 1 zip code at a median installed cost of $5.10/W, installations down 17.2% over the trailing twelve months, and an installs-weighted Market Score of 34.
Active installations
740
Zip markets
1
Median cost
$5.10/W
12-mo growth
▼ 17.2%
Installers active
12
City Market Score
Fair · installs-weighted across 1 zips
Best zip in Atherton scores higher than 12% of U.S. zip markets.
Versus California
How Atherton compares with the state
Installed cost
$0.83/W above
state median $4.26/W
Market score
34 vs 53
California scores 53
Share of state installs
0.03%
of 2.3M tracked statewide
Battery attach
16.4%
state 12.7%
Statewide momentum
▲ 1.1%
residential solar added in California, 12 months through Jul 2026
Statewide market
2.3M systems
30.9% of homes · utility-reported through Jul 2026
Next-12-month outlook: 43–53 installs (midpoint 48)
Trailing-12-month installs carried forward at half the observed growth rate (capped at ±30%), with a ±10% band. Not a forecast of permits or policy.
Growth & pricing
Atherton by year
53 installs in the trailing twelve months vs 64 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in Atherton
Summed across every zip in the city
| # | Installer | Installs | 12-mo | Zips | $/W |
|---|---|---|---|---|---|
| 1 | COBALT POWER SYSTEMS | 130 | 14 | 1 | $5.76 |
| 2 | TESLA | 96 | 0 | 1 | $5.12 |
| 3 | BAY AREA ENERGY SOLUTIONS | 60 | 5 | 1 | $4.70 |
| 4 | POCO SOLAR ENERGY | 24 | 0 | 1 | $5.98 |
| 5 | SUNPOWER | 22 | 0 | 1 | $4.79 |
| 6 | SUNRUN | 19 | 3 | 1 | $3.84 |
| 7 | CLEAN SOLAR | 16 | 0 | 1 | $5.07 |
| 8 | RGS ENERGY | 14 | 0 | 1 | $8.07 |
| 9 | SEMPER SOLARIS | 13 | 2 | 1 | $5.83 |
| 10 | YOUR ENERGY SOLUTIONS | 11 | 3 | 1 | $3.72 |
| 11 | ROCKIN ROOFERS | 10 | 2 | 1 | $4.33 |
| 12 | LUMINALT ENERGY | 10 | 0 | 1 | $6.51 |
Zip markets
Zips in Atherton
Ranked by installations · click for the zip market
| Zip | Installs | $/W | Score |
|---|---|---|---|
| 94027 | 740 | $5.10 | 34 D |