The 25 contractors pulling the most building permits in San Diego, ranked by PermitStack's activity score — built from 1,013,539 permits on file. Updated from live public records.
| # | Contractor | Permits | Score | Top trades | Last permit |
|---|---|---|---|---|---|
| 1 | Southern Contracting Company | 16,912 | 99 | addition, electrical, hvac | Oct 2024 |
| 2 | CALIFORNIA DELTA MECHANICAL INC | 10,124 | 100 | electrical, hvac, interior_remodel | Jul 2026 |
| 3 | ASI Hastings, Inc | 9,631 | 100 | battery, electrical, fire_alarm | Aug 2026 |
| 4 | Sunrun Inc | 8,892 | 100 | addition, battery, electrical | Aug 2026 |
| 5 | Pardee Homes | 6,034 | 83 | addition, electrical, fence | Nov 2024 |
| 6 | SOUTHERN CONTRACTING | 5,756 | 98 | electrical, interior_remodel, plumbing | Dec 2020 |
| 7 | WALTER ANDERSON PLUMBING | 5,400 | 97 | electrical, hvac, interior_remodel | Aug 2026 |
| 8 | CALIFORNIA MECHANICAL | 5,362 | 76 | electrical, hvac, plumbing | Aug 2026 |
| 9 | BAKER ELECTRIC HOME ENERGY | 4,578 | 100 | battery, electrical, ev_charger | Aug 2026 |
| 10 | SOLAR CITY CORP | 3,638 | 82 | addition, battery, electrical | Jul 2018 |
| 11 | Vivint Solar LLC | 3,494 | 100 | addition, battery, electrical | Apr 2021 |
| 12 | STELLAR SOLAR | 3,132 | 100 | battery, electrical, fire_alarm | Aug 2026 |
| 13 | ASI HEATING & AIR | 3,020 | 65 | addition, electrical, hvac | Apr 2020 |
| 14 | ALL STAR WATER HEATERS INC | 2,977 | 96 | electrical, hvac, mechanical | Apr 2023 |
| 15 | AFFORDABLE WATER HEATERS LLC | 2,766 | 79 | electrical, hvac, mechanical | May 2018 |
| 16 | Vivint Solar Developer, LLC. | 2,710 | 98 | addition, battery, electrical | Mar 2023 |
| 17 | DELTA MECHANICAL | 2,381 | 100 | addition, electrical, fire_alarm | Jun 2026 |
| 18 | Anderson Plumbing | 2,246 | 96 | electrical, hvac, interior_remodel | Aug 2026 |
| 19 | Bright Planet Solar | 1,980 | 100 | battery, electrical, grading | May 2026 |
| 20 | ARCHON ENERGY SOLUTIONS | 1,969 | 92 | electrical, ev_charger, hvac | Jul 2026 |
| 21 | Sullivan Solar Power | 1,881 | 90 | battery, electrical, ev_charger | May 2021 |
| 22 | SOLAR TECH ENERGY SYSTEMS INC | 1,819 | 100 | addition, battery, electrical | Aug 2026 |
| 23 | BURGER CONSTRUCTION | 1,819 | 87 | addition, demolition, electrical | Jul 2026 |
| 24 | BAKER ELECTRIC SOLAR | 1,808 | 82 | addition, battery, electrical | Aug 2019 |
| 25 | FAST WATER HEATER CO | 1,796 | 99 | electrical, hvac, mechanical | Oct 2013 |
"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.
Query contractors, scores, and permits programmatically — GET /v1/contractors/search?state=CA&sort=score