In Pennsylvania, a tenant must obtain the landlord's written consent before subleasing their rental unit. After you find the right subtenant, have them sign a contract.A landlord may ask you to fill out a rental application. So you must evict your tenant from whom the person is subletting. Subletting is the same as subleasing; the two words are interchangeable. As long as your landlord, or state law, approves, anyone can sublet. Subletting the Property. Tenants may be able to sublet the rental unit if they get permission from their landlord. In general, Pennsylvania does allow subletting unless it is explicitly prohibited in your agreement.