Licensed Contractors in Massachusetts
Massachusetts licenses general contractors through the OPSI Construction Supervisor License (CSL) — required for anyone supervising construction on buildings containing one to four dwelling units or over 35,000 cubic feet of enclosed space. Electricians, plumbers, and HVAC trades sit on separate state portals and are not included in this dataset; home-improvement trades like roofing and painting fall under the HIC registration at contractorhub.mass.gov.
Search Massachusetts contractors
Trades available in Massachusetts
Data source
Direct from the Massachusetts Office of Public Safety and Inspections (OPSI)
Every record we deliver in Massachusettscomes from the state's official license registry, refreshed regularly. We enrich each row with phone, email, website, and Google ratings sourced from public business listings. Contact info present for over 95% of records.
Visit Massachusetts Office of Public Safety and Inspections (OPSI) →What you get
- • Active license number + classification
- • Business name + license holder name
- • Phone, email, website (95%+ coverage)
- • Google rating + review count where available
- • Full mailing address + ZIP
- • Issue date + expiration date
- • CSV delivered to your inbox in under 3 minutes