A CSL permits an individual to legally supervise persons engaged in construction, reconstruction, alteration, repair, removal or demolition of certain limited types of buildings in the Commonwealth of Massachusetts.

1) Unrestricted Construction Supervisors License: A person who possesses an unrestricted construction supervisor's license may supervise individuals engaged in construction, reconstruction, alteration, repair, removal or demolition of any of the following: a) a single or two-family dwelling (or accessory structure) of any size; b) any other use building as defined by 780 CMR (the State Building Code) up to 35,000 cubic feet of enclosed space; c) buildings used for farm purposes and retaining walls less than 10 feet in height at all points along the wall as measured from the base of the footing to the top of the wall.

2) Restricted Construction Supervisors License: A person who possesses a restricted construction supervisor's license may supervise individuals engaged in construction, reconstruction, alteration, repair, removal or demolition of any single or two-family dwelling (or accessory structure) irrespective of its size.

3) Masonry Only License: A person who possesses a masonry only license may supervise individuals engaged in construction, reconstruction, alteration, repair, removal or demolition of fireplaces, chimneys, required means of egress stairs of masonry construction, masonry retaining walls which retain four feet or more of unbalanced fill, and other masonry structures for which a building permit is required.