The 25 contractors pulling the most building permits in Cambridge (Solar), ranked by PermitStack's activity score — built from 733 permits on file. Updated from live public records.
| # | Contractor | Permits | Score | Top trades | Last permit |
|---|---|---|---|---|---|
| 1 | Great Sky Solar | 87 | 83 | solar | May 2026 |
| 2 | SUNBUG SOLAR LLC | 78 | 88 | interior_remodel, solar | Feb 2026 |
| 3 | The Boston Solar Company | 63 | 79 | solar | Jun 2026 |
| 4 | Boston Solar | 32 | 81 | solar | Apr 2026 |
| 5 | ReVision Energy Inc | 29 | 75 | electrical, interior_remodel, solar | Jun 2026 |
| 6 | Sunrun Installation Services, Inc | 24 | 100 | battery, electrical, ev_charger | May 2026 |
| 7 | Trinity Solar Inc | 22 | 100 | battery, electrical, interior_remodel | Jun 2026 |
| 8 | Momentum Solar, LLC | 18 | 100 | electrical, interior_remodel, renovation | May 2025 |
| 9 | Northeast Solar Services dba Revolusun | 18 | 45 | solar | Sep 2022 |
| 10 | ALL ENERGY SOLAR | 17 | 92 | battery, demolition, electrical | Jan 2026 |
| 11 | Sunrun Inc | 12 | 100 | addition, battery, electrical | Jun 2026 |
| 12 | Vision Solar. LLC | 12 | 89 | electrical, interior_remodel, renovation | Oct 2023 |
| 13 | INVALEON TECHNOLOGIES CORP. | 12 | 55 | interior_remodel, solar | Dec 2020 |
| 14 | TEAM SUNSHINE CONSTRUCTION LLC | 10 | 63 | electrical, interior_remodel, solar | Jan 2026 |
| 15 | Viridis Energy Solutions LLC | 10 | 62 | interior_remodel, solar | Jun 2026 |
| 16 | Skyline Solar Inc. | 9 | 94 | electrical, interior_remodel, solar | Dec 2025 |
| 17 | SOLECT ENERGY DEVELOPMENT LLC | 9 | 69 | interior_remodel, solar | Jan 2025 |
| 18 | NUWATT ENERGY LLC | 9 | 68 | interior_remodel, solar | Jun 2023 |
| 19 | Second Generation Energy | 9 | 59 | solar | Feb 2026 |
| 20 | SOLARFLAIR ENERGY | 9 | 56 | interior_remodel, solar | Oct 2024 |
| 21 | Ecoloop Construction LLP | 7 | 72 | electrical, interior_remodel, solar | Oct 2025 |
| 22 | Empower Energy Solutions | 7 | 69 | electrical, interior_remodel, solar | Nov 2025 |
| 23 | Tesla Energy, Inc | 6 | 100 | battery, electrical, ev_charger | Apr 2026 |
| 24 | Bright Planet Solar | 6 | 100 | battery, electrical, interior_remodel | Aug 2023 |
| 25 | SUNLIGHT SOLAR ENERGY | 6 | 83 | interior_remodel, solar | Jan 2023 |
"Score" is a 0–100 activity index from permit volume, recency, project value, and geographic reach. "Permits" counts building permits this contractor pulled in Cambridge (Solar).
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