A Massachusetts sublease agreement is a document that legally allows the original tenant of a rented property to lease it to a new tenant. Create your Massachusetts sublease agreement to rent your unit.Use our free template to sublet to a new tenant. Easily manage your sublease process with our Sublease Agreement Massachusetts. Easily edit, fill and sign for free with Lumin. The first step in subletting a rental in Massachusetts is reviewing the original lease agreement. Property description: Precisely define the property being sublet, including address and unit number. If you are a renter looking to sublet, it is important to read the lease agreement and look for clauses regarding subleasing. The sample forms here are for reference and educational purposes only. Where can you sublet?