Subletting, also known as subleasing, involves renting out a property or a portion of it that you are currently leasing, to a new tenant. We created this community to make the process of finding a new home, tenant, or roommate, just that bit easier.Here's some language for a sample letter requesting sublet permission. Use it in part or full when submitting your proposal. 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. A sublease agreement is drawn up in these situations, specifying key terms between you, the original tenant, and your friend, the subtenant. Subletting is a real estate arrangement where a tenant leases their rental property or part of it to another individual, known as a subtenant. A sublease agreement is a legal contract signed between a tenant and a third party allowing the latter to rent out the entire property or any part of it. A complete sublease occurs when the original tenant leases out the entire property to a subtenant.