| State | State Names | License Type | License Number |
| AK | Alaska | General Contractor Without Residential Contractor Endorsement License | 177030 |
| AK | Alaska | Architect, Engineer and Land Surveyor Firms | 183418 |
| AL | Alabama | General Contractor License | 56841 |
| AL | Alabama | Certificate of Authorization | ECA4826 |
| AR | Arkansas | Certificate of Authorization | 2281 |
| AR | Arkansas | Contractor License | 218010624 |
| AZ | Arizona | B-1 GENERAL COMMERCIAL CONTRACTOR LICENSE | 171289 |
| AZ | Arizona | A General Engineering License | 218451 |
| AZ | Arizona | KB-1 Dual Building Contractor License | 281506 |
| AZ | Arizona | Engineering Firm Registration | 19300-0 |
| CA | California | A-General Engineering License
B-General Building Contractors License |
991965 |
| CT | Connecticut | Engineering Firm License | PEC.0001547 |
| CT | Connecticut | Major Contractor Registration | MCO.0902002 |
| DC | District of Columbia | General Contractor/Construction Manager License | 410517000571 |
| DE | Delaware | Non-Resident Contractor License | 2015101824 |
| DE | Delaware | Certificate of Authorization | 3835 |
| FL | Florida | Certified Building Contractor License | CBC1259611 |
| FL | Florida | Engineering Business Registry | 30581 |
| GA | Georgia | Engineering Firm License | PEF006586 |
| GA | Georgia | General Contractor License | GCCO008328 |
| HI | Hawaii | C-52 Ventilating and Air Conditioning Contractor License | CT-28157 |
| HI | Hawaii | C-13 Electrical Contractor License | CT-36765 |
| HI | Hawaii | A-General Engineering License
B-General Building Contractors License C-52 Ventilating and Air Conditioning Contractor License |
CT-23697 |
| ID | Idaho | Certificate of Authorization | 4782 |
| ID | Idaho | Registered Contractor | RCE-66734 |
| IL | Illinois - City of Chicago | General Contractor's License | TGC131523 |
| IL | Illinois | Design Firm - Professional Engineering License | 184.006993-002 |
| KY | Kentucky | Engineering Firm License | 3501 |
| LA | Louisiana | Engineering Firm License | 5635 |
| LA | Louisiana | Contractor License | 47086 |
| MD | Maryland | Professional Engineer Firm License | 48695 |
| MS | Mississippi | Certificate of Authority (Engineering) | 26995 |
| MS | Mississippi | Contractor License | 19587-SC |
| MO | Missouri | Professional Engineering Corporation Certificate | 2016005498 |
| NC | North Carolina | General Contractor Building License | 56274 |
| NC | North Carolina | Limited Engineering Firm License | D-0327 |
| NJ | New Jersey | Certificate of Authorization | 24GA28243800 |
| NV | Nevada | Certificate of Firm Registration | 21687 |
| NV | Nevada | B-2 Residential and Small Commercial License | 0067100 |
| OH | Ohio | Certificate of Authorization | COA.04721 |
| RI | Rhode Island | Certificate of Authorization | 8035 |
| RI | Rhode Island | Commercial Contractor License | GC-48446 |
| SC | South Carolina | General Contractor License | 116205 |
| SC | South Carolina | Certificate of Authorization | 4965 |
| TN | Tennessee | Contractor License | 70216 |
| TN | Tennessee | Engineering Firm Registration | 7881 |
| TX | Texas | Certificate of Registration | F-16865 |
| UT | Utah | Contractor with LRF License | 8012434-5501 |
| VA | Virginia | Class A Contractor License | 270506612 |
| VA | Virginia | Engineering Business Entity Registration | 407005792 |
| WA | Washington | CC01 - General Contractor License | NORESL*822B4 |
| WI | Wisconsin | Certificate of Authorization | 4100-11 |
| WV | West Virginia | Certificate of Authorization | C06867-00 |
| WV | West Virginia | General Building Contractor License | WV059406 |
Licensing requirements for contractors and engineering firms vary by state, municipality, and market. The licenses listed reflect those that NORESCO is required to carry as part of ongoing work and are updated from time to time. These licenses do not reflect NORESCO's full service area and do not imply limitations on NORESCO's area of operation. To the extent permissible by law, NORESCO expressly disclaims all liability towards any third parties for reliance on this list, and any specific inquiries about NORESCO’s licensing qualifications or capabilities can be directed to the inbox at [email protected].