The 25 contractors pulling the most building permits in Lake Forest, ranked by PermitStack's activity score — built from 49,561 permits on file. Updated from live public records.
| # | Contractor | Permits | Score | Top trades | Last permit |
|---|---|---|---|---|---|
| 1 | TOLL BROS INC | 993 | 100 | addition, demolition, electrical | Jan 2026 |
| 2 | SHEA HOMES INC | 806 | 95 | addition, demolition, electrical | Aug 2018 |
| 3 | Vivint Solar LLC | 795 | 100 | addition, battery, electrical | Dec 2021 |
| 4 | Sunrun Inc | 539 | 100 | addition, battery, electrical | Oct 2025 |
| 5 | SolarCity Corporation DBA Tesla | 527 | 73 | battery, electrical, ev_charger | Apr 2018 |
| 6 | FAST WATER HEATER COMPANY | 498 | 98 | electrical, hvac, interior_remodel | Dec 2025 |
| 7 | WHITE MECHANICAL INC | 371 | 95 | addition, electrical, hvac | Jun 2026 |
| 8 | SolarCity Corporation | 358 | 92 | addition, battery, electrical | May 2018 |
| 9 | LANDSEA HOLDINGS CORPORATION | 294 | 59 | electrical, fence, foundation | Jan 2022 |
| 10 | KB Homes Southern California | 291 | 55 | electrical, fence, interior_remodel | Jul 2013 |
| 11 | LENNAR HOMES OF CALIFORNIA INC | 278 | 100 | addition, battery, demolition | Aug 2022 |
| 12 | TESLA INC | 267 | 100 | addition, battery, demolition | Mar 2026 |
| 13 | Tesla Energy, Inc | 217 | 100 | battery, electrical, ev_charger | Aug 2023 |
| 14 | SERVICE CHAMPIONS | 210 | 100 | addition, electrical, hvac | Jul 2025 |
| 15 | BALDWIN NEW HOMES, INC. | 190 | 79 | demolition, fence, interior_remodel | Jun 2026 |
| 16 | The Loftcrafters Inc | 176 | 86 | addition, demolition, electrical | Apr 2026 |
| 17 | Dynamic Air Services Inc | 168 | 61 | electrical, hvac, interior_remodel | Apr 2022 |
| 18 | CALIFORNIA DELTA MECHANICAL INC | 164 | 100 | electrical, hvac, interior_remodel | Jan 2026 |
| 19 | Triton Air Inc | 164 | 91 | electrical, hvac, interior_remodel | Jun 2026 |
| 20 | LANDIS WILLIAMS CONSTRUCTION INC | 162 | 74 | renovation | May 2026 |
| 21 | SUNPOWER CORPORATION SYSTEMS | 147 | 99 | addition, battery, electrical | Jul 2024 |
| 22 | GREENSTAR HOME SERVICES | 147 | 87 | electrical, hvac, interior_remodel | Aug 2021 |
| 23 | ALL STAR WATER HEATERS INC | 133 | 95 | electrical, hvac, mechanical | May 2021 |
| 24 | HOME COMFORT USA | 130 | 84 | electrical, hvac, interior_remodel | Dec 2024 |
| 25 | SunPower Corp. Systems | 128 | 74 | electrical, roofing, solar | Jul 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 Lake Forest.
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