Marin County, CA solar installation & market data
Updated May 22, 2026 By The SolarDNA Data Team
Marin County has 19,108 solar installations across 34 zip codes at a median installed cost of $4.89/W, installations up 19.1% over the trailing twelve months, and an installs-weighted Market Score of 47.
Active installations
19,108
Zip markets
34
Median cost
$4.89/W
12-mo growth
▲ 19.1%
Installers active
777
County Market Score
Great · installs-weighted across 34 zips
Best zip in Marin County scores higher than 97% of U.S. zip markets.
Versus California
How Marin County compares with the state
Installed cost
$0.62/W above
state median $4.26/W
Market score
47 vs 53
California scores 53
Share of state installs
0.85%
of 2.3M tracked statewide
Battery attach
17.8%
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: 1,332–1,628 installs (midpoint 1,480)
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
Marin County by year
1,351 installs in the trailing twelve months vs 1,134 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in Marin County
Summed across every zip in the county
| # | Installer | Installs | 12-mo | Zips | $/W |
|---|---|---|---|---|---|
| 1 | TESLA | 3,231 | 105 | 27 | $5.03 |
| 2 | SUNRUN | 1,470 | 179 | 25 | $4.59 |
| 3 | SOLARCRAFT SERVICES | 1,418 | 123 | 28 | $5.15 |
| 4 | SUN FIRST | 1,135 | 43 | 28 | $5.45 |
| 5 | SUNPOWER | 640 | 10 | 20 | $4.82 |
| 6 | PAC SOLAR | 511 | 0 | 25 | $3.34 |
| 7 | ROCKIN ROOFERS | 509 | 47 | 27 | $4.44 |
| 8 | SEMPER SOLARIS | 458 | 26 | 17 | $5.15 |
| 9 | SPG SOLAR | 387 | 0 | 24 | $7.50 |
| 10 | RGS ENERGY | 350 | 0 | 23 | $7.33 |
| 11 | SOLARCRAFT | 307 | 0 | 21 | $4.00 |
| 12 | PETERSENDEAN | 292 | 0 | 21 | $3.90 |
| 13 | EARTHWISE ENERGY SOLUTIONS | 282 | 67 | 21 | $6.26 |
| 14 | NORTHERN PACIFIC POWER | 269 | 0 | 22 | $4.46 |
| 15 | BETTER EARTH | 246 | 0 | 15 | $5.01 |
| 16 | SONOMARIN SOLAR | 193 | 28 | 21 | $4.02 |
| 17 | SUNGEVITY | 189 | 0 | 20 | $5.33 |
| 18 | AMERICAN SOLAR | 185 | 0 | 23 | $5.86 |
| 19 | NEXUS ENERGY SYSTEMS | 167 | 17 | 17 | $5.21 |
| 20 | FREEDOM FOREVER | 165 | 17 | 17 | $5.14 |
| 21 | LUMINALT ENERGY | 156 | 0 | 19 | $6.63 |
| 22 | AMERICAN SOLAR DIRECT | 146 | 0 | 20 | $3.98 |
| 23 | CITADEL ROOFING AND SOLAR | 145 | 8 | 19 | $4.50 |
| 24 | MARIN SOLAR | 144 | 0 | 21 | $7.58 |
| 25 | HIGH DEFINITION SOLAR | 135 | 0 | 14 | $7.12 |
Zip markets
Zips in Marin County
Ranked by installations · click for the zip market
| Zip | Installs | $/W | Score |
|---|---|---|---|
| 94941 | 2,535 | $5.12 | 49 B |
| 94901 | 2,442 | $4.78 | 51 A |
| 94903 | 2,143 | $4.70 | 50 B |
| 94947 | 1,672 | $4.52 | 49 B |
| 94945 | 1,537 | $4.53 | 40 C |
| 94960 | 1,386 | $5.10 | 54 A |
| 94920 | 1,246 | $5.12 | 50 B |
| 94949 | 1,197 | $4.45 | 51 A |
| 94904 | 974 | $5.10 | 52 A |
| 94925 | 736 | $5.10 | 40 C |
| 94939 | 661 | $4.97 | 38 D |
| 94930 | 596 | $5.12 | 37 D |
| 94965 | 497 | $5.18 | 37 D |
| 94957 | 243 | $4.94 | 36 D |
| 94970 | 205 | $5.40 | 34 D |
| 94956 | 174 | $5.22 | 35 D |
| 94937 | 172 | $5.11 | 35 D |
| 94924 | 150 | $5.18 | 35 D |
| 94946 | 109 | $6.19 | 30 F |
| 94973 | 97 | $5.12 | 35 D |
| 94929 | 89 | $4.57 | 37 D |
| 94963 | 69 | $4.80 | 36 D |
| 94933 | 51 | $4.58 | 37 D |
| 94938 | 49 | $5.16 | 34 D |
| 94940 | 28 | $5.12 | 34 D |
| 94971 | 24 | $5.23 | 34 D |
| 94950 | 13 | $4.65 | 37 D |
| 94964 | 3 | $6.39 | 28 F |
| 94942 | 3 | $6.92 | 28 F |
| 94914 | 3 | $7.93 | 28 F |
| 94979 | 1 | $6.43 | 28 F |
| 94966 | 1 | $8.08 | 28 F |
| 94978 | 1 | $6.05 | 30 F |
| 94948 | 1 | $4.08 | 39 C |