A sublease creates a second layer of tenancy on top of the original lease agreement. The original tenant does not exit the lease; instead, they collect rent from the subtenant and remain responsible for paying the landlord and meeting every obligation spelled out in the master lease. This distinction matters enormously for property managers: the original tenant is still your counterparty. If the subtenant damages the unit or stops paying, the landlord can still pursue the original leaseholder for unpaid rent and repair costs, regardless of any side arrangement the two tenants made between themselves.
Whether a sublease is permitted at all depends on what the master lease says. Most landlord-drafted leases include either an outright prohibition on subleasing or a clause requiring written landlord consent before any sublease takes effect. Landlords and property managers should spell out the approval process clearly: who submits the request, what screening criteria the subtenant must meet, how much notice is required, and whether an administrative fee applies. Jurisdictions vary widely on how much discretion landlords may exercise when withholding consent, so local statute should always be checked before drafting a blanket prohibition. In states like California, for instance, landlords generally cannot unreasonably withhold consent in certain residential contexts.
From an investor standpoint, unauthorized subleases are a material lease violation that can justify termination, but the enforcement path must follow local notice-and-cure requirements before any eviction proceeding begins. On the flip side, permitting subleases strategically can reduce vacancy loss when a reliable original tenant needs to relocate temporarily. A well-structured sublease addendum that requires landlord-approved subtenants, caps the sublease term to the remaining lease period, and holds the original tenant jointly liable with the subtenant gives landlords meaningful protection while keeping a good tenant relationship intact.
Worked example
A property manager oversees a 12-month lease on a two-bedroom unit at $2,400 per month. The original tenant, seven months into the lease, accepts a temporary work assignment in another city for four months. Rather than breaking the lease and leaving the landlord with a vacancy, the tenant requests permission to sublease. The landlord approves a subtenant who passes the standard screening criteria. The original tenant signs a sublease agreement charging the subtenant $2,400 per month. The original tenant continues paying $2,400 to the landlord each month. If the subtenant pays late or skips a payment, the landlord still receives rent from the original tenant on the first of the month. The original tenant absorbs any collection risk from the subtenant, not the landlord. At the four-month mark, the subtenant vacates, the original tenant returns, and the master lease continues through its remaining month with no disruption to the landlord's cash flow.