The 25 contractors pulling the most building permits in San Diego County, ranked by PermitStack's activity score — built from 236,722 permits on file. Updated from live public records.
| # | Contractor | Permits | Score | Top trades | Last permit |
|---|---|---|---|---|---|
| 1 | VIVINT SOLAR DEVELOPER LLC | 5,720 | 70 | battery, electrical, ev_charger | Aug 2021 |
| 2 | SolarCity Corporation | 4,131 | 91 | addition, battery, demolition | Feb 2018 |
| 3 | Sunrun Installation Services, Inc | 4,030 | 100 | addition, battery, electrical | Sep 2022 |
| 4 | SEMPER SOLARIS CONSTRUCTION INC | 3,693 | 100 | battery, electrical, ev_charger | Mar 2022 |
| 5 | SUNPOWER CORPORATION SYSTEMS | 2,973 | 99 | addition, battery, demolition | Nov 2023 |
| 6 | N B BAKER ELECTRIC INC | 2,459 | 75 | electrical, ev_charger, interior_remodel | May 2018 |
| 7 | CALIFORNIA DELTA MECHANICAL INC | 2,415 | 100 | electrical, hvac, interior_remodel | Oct 2023 |
| 8 | BAKER ELECTRIC HOME ENERGY | 2,245 | 100 | battery, electrical, ev_charger | Dec 2023 |
| 9 | WALTER ANDERSON PLUMBING | 2,201 | 97 | addition, demolition, electrical | Dec 2023 |
| 10 | NB BAKER ELECTRIC INC | 2,177 | 100 | battery, electrical, ev_charger | Oct 2021 |
| 11 | Sunrun Inc | 2,045 | 100 | addition, battery, electrical | Dec 2023 |
| 12 | LENNAR HOMES OF CALIFORNIA INC | 1,430 | 100 | addition, battery, demolition | Nov 2021 |
| 13 | ACCURATE COMFORT SYSTEMS INC | 1,379 | 96 | battery, electrical, hvac | Aug 2021 |
| 14 | Cosmic Solar Inc. | 1,251 | 100 | battery, electrical, ev_charger | Dec 2023 |
| 15 | M N MAUZY MECHANICAL INC | 1,232 | 92 | electrical, hvac, mechanical | Aug 2021 |
| 16 | SOLAR TECH ENERGY SYSTEMS INC | 1,192 | 100 | addition, battery, electrical | Nov 2023 |
| 17 | TMAG INDUSTRIES INC | 1,161 | 84 | battery, electrical, ev_charger | Aug 2021 |
| 18 | Kb Home Coastal Inc | 1,067 | 99 | addition, demolition, electrical | Nov 2023 |
| 19 | Southern Contracting Company | 988 | 98 | addition, electrical, hvac | Nov 2023 |
| 20 | Bright Planet Solar | 920 | 99 | addition, battery, electrical | Jul 2021 |
| 21 | SMITH ELECTRICAL CONTRACTORS | 911 | 98 | battery, electrical, ev_charger | Nov 2023 |
| 22 | MILHOLLAND ELECTRIC INC | 877 | 97 | battery, electrical, ev_charger | Oct 2023 |
| 23 | Sunline Energy Inc | 800 | 100 | battery, demolition, electrical | Nov 2023 |
| 24 | Solare Energy, Inc. | 712 | 96 | addition, battery, electrical | Nov 2023 |
| 25 | West Coast Appliance Services, Inc | 711 | 97 | electrical, hvac, mechanical | Aug 2021 |
"Score" is a 0–100 activity index from permit volume, recency, project value, and geographic reach. "Permits" counts building permits this contractor pulled in San Diego County.
Query contractors, scores, and permits programmatically — GET /v1/contractors/search?state=CA&sort=score