So you are moving into a share house. There are a few ways of sharing but in all cases the landlord or real estate agent must be notified of any share arrangements.
This is when the current tenant leases one or more rooms to other tenants but those other tenants are not named on the lease agreement. The person whose name is on the lease must ask written permission from the rental provider to sublet. The first tenant is called the head-tenant and the other tenants are called the sub-tenant. The agreement between them is called a sub-lease. If you are becoming the sub-tenant, ask to see written permission from the landlord/real estate agent.