Key Facts
| Statutory basis | MGL c.143 |
|---|---|
| Administering agency | Board of Building Regulations and Standards (BBRS) |
| Required for | Pulling building permits, supervising structural work |
| Format | Examination-based license (vs registration) |
| Prerequisites | 3 years experience + 110-hour course + exam + $100 fee |
| Renewal cycle | 2 years + continuing education |
| Class 1 (Unrestricted) | Buildings under 35,000 cu ft (most residential) |
| Class 2 (Restricted) | One- and two-family only |
| CSL holder accountability | Personal liability for code compliance |
| Verification database | mass.gov BBRS CSL lookup |
| Required pairing with HIC | For residential work above $1,000 |
Related Sub-Entities
- CSL Class 1 (Unrestricted) — Residential <35K cu ft + small commercial
- CSL Class 2 (Restricted) — One- and two-family only
- Board of Building Regulations and Standards (BBRS) — Issuing state agency
- 780 CMR State Building Code — Code that CSL supervisors enforce
- Home Improvement Contractor (HIC) — Companion registration for consumer protection
Licenses — Related Pro Build Services
- Construction & Remodeling — CSL-supervised structural work.
- ADU Builders — CSL Class 1 ADU construction.
- Custom Home Builders — New construction under CSL supervision.