Oak Park, IL solar installation & market data
Updated September 21, 2026 By The SolarDNA Data Team
Oak Park has 541 solar installations across 3 zip codes, installations down 4.3% over the trailing twelve months, and an installs-weighted Market Score of 42.
Active installations
541
Zip markets
3
Median cost
—
12-mo growth
▼ 4.3%
Installers active
28
City Market Score
Good · installs-weighted across 3 zips
Best zip in Oak Park scores higher than 53% of U.S. zip markets.
Versus Illinois
How Oak Park compares with the state
Installed cost
—
state median $6.56/W
Market score
42 vs 43
Illinois scores 43
Share of state installs
0.48%
of 112.7K tracked statewide
Battery attach
0.0%
state 0.0%
Statewide momentum
▲ 23.1%
residential solar added in Illinois, 12 months through Jul 2026
Statewide market
136.9K systems
4.0% of homes · utility-reported through Jul 2026
Next-12-month outlook: 59–72 installs (midpoint 65)
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
Oak Park by year
66 installs in the trailing twelve months vs 69 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in Oak Park
Summed across every zip in the city
| # | Installer | Installs | 12-mo | Zips | $/W |
|---|---|---|---|---|---|
| 1 | SUNRUN | 27 | 15 | 2 | — |
| 2 | FRESH COAST SOLAR | 20 | 17 | 2 | — |
| 3 | AILEY SOLAR ELECTRIC | 16 | 8 | 2 | — |
| 4 | CERTASUN | 8 | 3 | 2 | — |
| 5 | WINDFREE SOLAR | 6 | 2 | 2 | — |
| 6 | WINDFREE WIND & SOLAR ENERGY | 4 | 3 | 2 | — |
| 7 | BRIGHT PLANET SOLAR | 3 | 2 | 2 | — |
| 8 | BLUE RAVEN SOLAR | 2 | 0 | 2 | — |
| 9 | KAPITAL ELECTRIC | 2 | 0 | 1 | — |
| 10 | CELESTAR SOLAR | 2 | 1 | 1 | — |
| 11 | MIDWEST SOLUTIONS | 2 | 1 | 1 | — |
| 12 | ERIC HEINEMAN | 2 | 1 | 2 | — |
| 13 | WINDFREE | 2 | 1 | 1 | — |
| 14 | BRIGHT OPS | 1 | 1 | 1 | — |
| 15 | WINDSOLEIL | 1 | 0 | 1 | — |
| 16 | TITAN SOLAR POWER | 1 | 0 | 1 | — |
| 17 | FREEWORLD RENEWABLES | 1 | 1 | 1 | — |
| 18 | FREE WORLD SOLAR | 1 | 0 | 1 | — |
| 19 | SOLAR ENERGY OF ILLINOIS | 1 | 1 | 1 | — |
| 20 | LGCY POWER | 1 | 1 | 1 | — |
| 21 | FREE WORLD DBA FREE WORLD SOLAR | 1 | 1 | 1 | — |
| 22 | ONE EARTH SOLAR | 1 | 1 | 1 | — |
| 23 | FIBONACCI ENERGY | 1 | 0 | 1 | — |
| 24 | JDK ACQUISITIONS | 1 | 1 | 1 | — |
| 25 | REVOLUTION ENERGY SYSTEMS | 1 | 1 | 1 | — |