A tenant can sublet without the landlord's permission, even if the lease says its forbidden. No. Unless your lease already grants consent, you will need the written consent of the landlord for a sublease.If you would like to sublease your apartment, you must first tell your landlord that you want to do this. That is illegal (unless your contract specially states you are allowed to sublet). In New Jersey, subleasing requires explicit permission. Tenants must obtain written consent from their landlord before they can sublease their space. You are entitled to request permission to sublet from the owner, and the owner may not unreasonably refuse such permission. While tenants in rent regulated or government subsidized apartments have special rights, many rules and laws apply to both unregulated and regulated apartments. Some leases do not allow it. Others require landlord approval of any sub-tenants.