What does this mean for the living areas in shared houses? If the tenants all have individual tenancy agreements for their own rooms, then the shared parts of the house fall within the regulations and they cant smoke. However for a joint tenancy, it will depend on the terms of the tenancy agreement. Tenants in bedsits with their own tenancy agreement or houses and flats rented under the one tenancy agreement where the landlord permits smoking, this is not illegal.