The 25 contractors pulling the most building permits in Duluth, ranked by PermitStack's activity score — built from 238,728 permits on file. Updated from live public records.
| # | Contractor | Permits | Score | Top trades | Last permit |
|---|---|---|---|---|---|
| 1 | PERRAULT CONSTRUCTION INC | 27 | 65 | new_construction, renovation, roofing | Oct 2026 |
| 2 | Maxx Mechanical LLC | 17 | 57 | hvac, plumbing | Oct 2026 |
| 3 | THE JAMAR COMPANY | 13 | 77 | demolition, electrical, hvac | Sep 2026 |
| 4 | CALDWELL PLUMBING & HEATING INC | 9 | 72 | electrical, hvac, interior_remodel | Sep 2026 |
| 5 | ADVANTAGE AIR HEATING & COOLIN | 8 | 53 | hvac, plumbing | Jul 2026 |
| 6 | Independence Heating & Cooling, LLC | 5 | 65 | hvac, mechanical, new_construction | Sep 2026 |
| 7 | Shubitz Plumbing & Heating | 5 | 65 | electrical, hvac, new_construction | Sep 2026 |
| 8 | KTM Paving, Inc. | 5 | 62 | fence, foundation, plumbing | Sep 2026 |
| 9 | Optimum Solar Group | 5 | 55 | renovation, solar | Oct 2026 |
| 10 | Flat Roof Guys, LLP | 4 | 59 | roofing | Sep 2026 |
| 11 | St Cloud Refrigeration Inc (SCR) | 4 | 58 | hvac, mechanical | Sep 2026 |
| 12 | STONE PLUMBING AND HEATING INC | 4 | 50 | plumbing | Sep 2026 |
| 13 | Wetland Plumbing | 4 | 48 | plumbing | Jun 2026 |
| 14 | RACHEL CONTRACTING INC | 3 | 91 | addition, demolition, fence | Sep 2026 |
| 15 | Twin Ports Custom Climate, LLC | 3 | 72 | hvac, plumbing, roofing | Aug 2026 |
| 16 | Skyline Contractors LLC | 3 | 67 | addition, electrical, foundation | Aug 2026 |
| 17 | 3W Properties LLC | 3 | 53 | hvac, new_construction, plumbing | Jun 2026 |
| 18 | All Service Heating, LLC | 3 | 52 | hvac, plumbing | Oct 2026 |
| 19 | SUPERIOR CONST CO OF DULUTH | 3 | 50 | plumbing | Aug 2026 |
| 20 | Mosher Trucking and Excavating LLC | 3 | 49 | grading | Sep 2026 |
| 21 | Duluth Deck Company | 3 | 46 | — | Jul 2026 |
| 22 | Stack Bros Mechanical | 2 | 73 | battery, demolition, electrical | Sep 2026 |
| 23 | A.G. O'Brien Plumbing & Heating | 2 | 70 | electrical, hvac, plumbing | Jul 2026 |
| 24 | Donald Holm Construction Co., Inc. | 2 | 62 | electrical, hvac, interior_remodel | Sep 2026 |
| 25 | JMF Construction | 2 | 60 | interior_remodel, plumbing, renovation | Jul 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 Duluth.
Query contractors, scores, and permits programmatically — GET /v1/contractors/search?state=MN&sort=score