A tenant can sublet without the landlord's permission, even if the lease says its forbidden. You are entitled to request permission to sublet from the owner, and the owner may not unreasonably refuse such permission.No. Unless your lease already grants consent, you will need the written consent of the landlord for a sublease. Can I get in trouble if I sublease without my landlord's permission? Yes. Subleasing without your landlord's permission may violate your lease. If your landlord decides to deny your sublet request, the denial must be reasonable. Your landlord cannot unreasonably withhold consent to sublease. 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. The sublet was illegal and the tenant who was subletting to me and two other room mates was overcharging and making a profit. Tenants generally can't sublet their unit without the landlord's consent.