The 25 contractors pulling the most building permits in Marin County, ranked by PermitStack's activity score — built from 47,416 permits on file. Updated from live public records.
| # | Contractor | Permits | Score | Top trades | Last permit |
|---|---|---|---|---|---|
| 1 | ERNEST ONGARO & SONS INC | 1,992 | 100 | battery, electrical, ev_charger | Jul 2026 |
| 2 | Tesla Energy, Inc | 1,028 | 100 | addition, battery, electrical | Jan 2026 |
| 3 | PETER LEVI PLUMBING INC | 917 | 100 | electrical, foundation, hvac | Jul 2026 |
| 4 | DIVINE ELECTRIC | 775 | 99 | battery, electrical, ev_charger | Jul 2026 |
| 5 | Wedge Roofing | 695 | 98 | plumbing, renovation, roofing | Jul 2026 |
| 6 | JEMICO LLC | 587 | 100 | interior_remodel, new_construction, renovation | Jul 2026 |
| 7 | John Owens Services | 583 | 97 | electrical, hvac, interior_remodel | Jul 2026 |
| 8 | CAPSTONE ROOFING LLC | 476 | 98 | roofing, solar | Jul 2026 |
| 9 | Sunrun Installation Services, Inc | 416 | 100 | addition, battery, electrical | Jul 2026 |
| 10 | Sun First Inc. | 407 | 95 | battery, electrical, ev_charger | Aug 2024 |
| 11 | MC LERAN INC | 387 | 93 | roofing, solar | Jul 2026 |
| 12 | MOORE SERVICES HOLDINGS LLC | 378 | 98 | battery, electrical, hvac | Dec 2022 |
| 13 | ARB INC | 282 | 91 | electrical, foundation, grading | Jun 2026 |
| 14 | Sunrun Installation Service, Inc. | 258 | 100 | battery, electrical, interior_remodel | Nov 2025 |
| 15 | ABLE ROOFING COMPANY | 248 | 92 | renovation, roofing | Jul 2026 |
| 16 | ONGARO, ERNEST & SONS, INC. | 240 | 63 | hvac, mechanical, plumbing | Jul 2020 |
| 17 | DE MELLO ROOFING | 236 | 89 | hvac, roofing | May 2026 |
| 18 | INTEGRITY ELECTRIC LLC | 226 | 99 | battery, electrical, ev_charger | Jun 2026 |
| 19 | HADDON HEATING AND COOLING | 220 | 87 | hvac, interior_remodel, mechanical | Aug 2024 |
| 20 | SEMPER SOLARIS CONSTRUCTION INC | 217 | 100 | battery, electrical, ev_charger | Jul 2026 |
| 21 | ABRIL ROOFING INC | 210 | 86 | renovation, roofing | Jul 2026 |
| 22 | NORTHERN PACIFIC ROOFING INC | 208 | 91 | electrical, plumbing, renovation | Jul 2026 |
| 23 | GOLDEN GATE HOME IMPROVEMENT | 207 | 74 | foundation, interior_remodel, renovation | Nov 2023 |
| 24 | KELLY PLUMBING & HEATING INC | 201 | 90 | hvac, interior_remodel, mechanical | Jul 2026 |
| 25 | WILLIAM GOTELLI PLUMBING INC | 197 | 83 | plumbing, renovation | Jun 2026 |
"Score" is a 0–100 activity index from permit volume, recency, project value, and geographic reach. "Permits" counts building permits this contractor pulled in Marin County.
Query contractors, scores, and permits programmatically — GET /v1/contractors/search?state=CA&sort=score