Sublet and sublease are two different words for the same concept. The suffixes of each word, "let" and "lease," both mean to rent out a property.In a sublease, the original tenant retains liability to the landlord, and the subtenant deals directly with the sublessor. The subletter pays rent to the original tenant instead. In a sublet, the new renter makes rent payments to the property owner. A Massachusetts sublease agreement is a document that legally allows the original tenant of a rented property to lease it to a new tenant. In simple terms, sublet is for an entire rental property (e.g. , a studio) and sublease is for a portion of a rental property (e.g. The difference lies in who ends up in charge of the lease. A sublease or a sublet is a tenant who rents from your tenant.