Lafayette, CA solar installation & market data
Updated April 16, 2026 By The SolarDNA Data Team
Lafayette has 3,232 solar installations across 1 zip code at a median installed cost of $4.31/W, installations up 11.7% over the trailing twelve months, and an installs-weighted Market Score of 51.
Active installations
3,232
Zip markets
1
Median cost
$4.31/W
12-mo growth
▲ 11.7%
Installers active
12
City Market Score
Excellent · installs-weighted across 1 zips
Best zip in Lafayette scores higher than 92% of U.S. zip markets.
Versus California
How Lafayette compares with the state
Installed cost
$0.04/W above
state median $4.26/W
Market score
51 vs 53
California scores 53
Share of state installs
0.14%
of 2.3M tracked statewide
Battery attach
16.3%
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: 218–266 installs (midpoint 242)
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
Lafayette by year
229 installs in the trailing twelve months vs 205 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in Lafayette
Summed across every zip in the city
| # | Installer | Installs | 12-mo | Zips | $/W |
|---|---|---|---|---|---|
| 1 | TESLA | 481 | 20 | 1 | $4.86 |
| 2 | SUNRUN | 222 | 16 | 1 | $4.07 |
| 3 | SUNPOWER | 171 | 2 | 1 | $4.25 |
| 4 | DIABLO SOLAR SERVICES | 120 | 2 | 1 | $4.21 |
| 5 | SEMPER SOLARIS | 112 | 4 | 1 | $4.91 |
| 6 | SOLAR TECHNOLOGIES | 99 | 4 | 1 | $4.67 |
| 7 | SUNGEVITY | 75 | 0 | 1 | $4.04 |
| 8 | YOUR ENERGY SOLUTIONS | 65 | 6 | 1 | $3.75 |
| 9 | SKY POWER SOLAR | 63 | 0 | 1 | $4.30 |
| 10 | WEST COAST SOLAR | 56 | 4 | 1 | $3.54 |
| 11 | PETERSENDEAN | 53 | 0 | 1 | $3.80 |
| 12 | CITADEL ROOFING AND SOLAR | 52 | 23 | 1 | $2.71 |
Zip markets
Zips in Lafayette
Ranked by installations · click for the zip market
| Zip | Installs | $/W | Score |
|---|---|---|---|
| 94549 | 3,232 | $4.31 | 51 A |