Create your Massachusetts sublease agreement to rent your unit. Use our free template to sublet to a new tenant.This Agreement must follow and is subject to the Master Lease between the Sublessor and Landlord. A copy of the Master Lease has been attached and is hereby. However, most leases require landlord written consent before subleasing can occur, as noted in Massachusetts Legal Help guidelines. A valid Massachusetts sublease agreement must describe the property in great detail. This includes the address, size, and purpose. A Massachusetts sublease agreement is a document outlining the terms of sharing a rental property with new renters under the parameters of an existing lease. SECURITY DEPOSIT: Upon signing the Lease the Tenant agrees to pay a security deposit equal to one month of the tenant's portion of the rent. When using this as a sublet option, after the subtenant signs the sublease agreement, contact the landlord and attempt to get her consent.