Subletting is not always allowed. The landlord must make sure that the tenant is given a legible copy of the lease or rental agreement.Have you guys ever sublet an apartment for the summer without your landlord knowing ? It states in my lease that I cannot do so. No; tenants cannot sublet any rooms in a rental property without following the proper procedure as outlined in the lease. If you have a lease for a set term, like one year, you can sublet with or without your landlord's permission, unless they prohibit this in the written lease. Massachusetts law about landlord and tenant. Laws, regulations, cases, and web sources on landlord and tenant law in general.