A tenant can sublet without the landlord's permission, even if the lease says its forbidden. Tenants who move out of a rental unit, or sublet their unit without giving the owner 30 days' written notice, lose the protection of the disclosure law.This booklet helps people renting a place to live understand their legal rights. It is a general guide and is not meant to answer all questions. Some fixed term leases will say that you have to, but it has to be written in the lease. It is illegal to refuse to sell or rent to you because you're a member of a protected class (i.e. Most leases prohibit subletting, or only allow it with permission. Shall not assign this Lease without Landlord's written consent. The consent shall not be unreasonably withheld or. Usually it's in the lease whether or not it's allowed.