A sublease is an agreement where someone takes over part or all of an existing lease. This type of lease involves at least three parties.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. A sublet allows direct landlord communication with the subtenant, unlike a sublease, where the legal relationship is between the primary and subtenant. Subleasing and taking over your lease is 2 different things. Subleasing is when a third party basically rents from you. 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. Subleasing is when the person whose name is on the lease finds another person to pay the monthly rent.