Home improvement subcontractors may work without a license when performing home improvements for an MHIC licensed contractor in the state of Maryland. Licensed Contractors.Always select a contractor that is licensed with the MHIC. Complete and submit the Marine Contractor License Application Form. Step 3: Application Form. Maryland law distinguishes between state construction contractor licenses requiring an exam and county licenses that may not require an exam. The state of Maryland provides broad protection for parties involved in a construction project to file a mechanic's lien. Discover which lawyers and law firms are ranked top for Construction in Maryland. Find out more in the Chambers and Partners USA guide. Examine Maryland Construction Legal Forms and select the form you need.