Legal Question in Real Estate Law in Massachusetts

The question is a little vague, but if it is your privately owned property, generally, you decide who can live there. If the use of the property expands beyond single residential, it may be regulated by applicable zoning and Board of Health rules. Moreover, if there is a commercial element (rent) involved, it may be subject to further zoning/licensing/fire and building code requirements.

Not unless it violates a relevant zoning code.

Consider retaining an attorney to whom full disclosure of the facts would be helpful to their application of the relevant law.

Good Luck!