Create your Pennsylvania sublease agreement and sublet your property. Rent your unit to a subtenant with our attorney-approved template.A commercial sublease is an agreement between the current tenant and the new tenant to lease the space together. Subletting your office space or commercial property? Easily customize your own Commercial Sublease Agreement. What is included in a standard Commercial Sublease Agreement? How do I fill this out? Filling out this Commercial Sublease Agreement requires attention to detail and properly addressing all parties involved. Do not sign a lease until all blanks are filled in. Make sure you get a copy of the whole lease at signing and keep your copy in a safe place.