A building permit can be issued to individuals that poses a valid construction supervisors license (780 CMR R5) and are registered as a Home Improvement Contractor (780 CMR R6, MGL ch142A). An unrestricted construction supervisors license is valid for buildings and structures containing less than 35,000 cubic feet. A Home Improvement contractor registration is generally required for any individual or corporation involved in the improvement of any existing building or structure containing one to four residential dwelling units.