The 25 contractors pulling the most building permits in Fairfield, ranked by PermitStack's activity score — built from 122,518 permits on file. Updated from live public records.
| # | Contractor | Permits | Score | Top trades | Last permit |
|---|---|---|---|---|---|
| 1 | Sunrun Inc | 1,368 | 100 | addition, battery, electrical | Aug 2026 |
| 2 | Discovery Builders Inc | 1,218 | 88 | addition, demolition, electrical | Jun 2026 |
| 3 | ARCHON ENERGY SOLUTIONS | 1,144 | 91 | electrical, ev_charger, hvac | May 2025 |
| 4 | Tesla Energy, Inc | 1,120 | 100 | addition, battery, electrical | Aug 2026 |
| 5 | SUNPOWER CORPORATION SYSTEMS | 657 | 100 | addition, battery, demolition | Apr 2024 |
| 6 | CALIFORNIA DELTA MECHANICAL INC | 602 | 100 | electrical, hvac, interior_remodel | Jul 2026 |
| 7 | LENNAR HOMES OF CALIFORNIA INC | 491 | 100 | addition, battery, demolition | Jul 2026 |
| 8 | Ambrose Solar Inc. | 424 | 100 | battery, electrical, ev_charger | Jul 2026 |
| 9 | CITADEL ROOFING AND SOLAR | 390 | 100 | battery, electrical, ev_charger | Jun 2026 |
| 10 | BONNEY PLUMBING LLC | 361 | 99 | addition, electrical, ev_charger | Aug 2026 |
| 11 | V3 Electric, Inc | 348 | 99 | battery, electrical, ev_charger | Jun 2026 |
| 12 | DE NOVA HOMES INC | 335 | 82 | demolition, electrical, fence | Mar 2026 |
| 13 | THE HOME DEPOT | 328 | 100 | addition, demolition, electrical | Oct 2025 |
| 14 | BELL BROTHERS HEATING AND AIR | 320 | 80 | electrical, hvac, interior_remodel | Aug 2026 |
| 15 | Cal Roofing Systems, Inc. | 265 | 87 | foundation, interior_remodel, roofing | Jul 2026 |
| 16 | D R HORTON BAY INC | 263 | 78 | addition, electrical, fence | Sep 2024 |
| 17 | Freedom Forever Northern California, LLC | 256 | 100 | battery, electrical, ev_charger | Jul 2026 |
| 18 | PETER LEVI PLUMBING INC | 242 | 100 | electrical, foundation, hvac | Aug 2026 |
| 19 | AFFORDABLE ROOFING | 239 | 100 | foundation, interior_remodel, new_construction | Aug 2026 |
| 20 | Petersen-Dean, Inc. | 235 | 75 | battery, electrical, ev_charger | May 2019 |
| 21 | ENVIRONMENTAL HEATING AND AIR SOLUTIONS | 231 | 80 | hvac, mechanical, plumbing | Jul 2026 |
| 22 | ONE ELECTRIC | 229 | 92 | addition, electrical, fire_alarm | Feb 2020 |
| 23 | Tri Pointe Homes | 222 | 100 | addition, demolition, electrical | Jun 2026 |
| 24 | Govea Roofing Co | 197 | 83 | interior_remodel, roofing, solar | Jul 2026 |
| 25 | MERITAGE HOMES OF CALIFORNIA INC | 180 | 100 | addition, demolition, electrical | Jul 2020 |
"Score" is a 0–100 activity index from permit volume, recency, project value, and geographic reach. "Permits" counts building permits this contractor pulled in Fairfield.
Query contractors, scores, and permits programmatically — GET /v1/contractors/search?state=CA&sort=score