If a lease for real estate, . B such as a house, is usually concluded for a period of six months to a year or more, a rental agreement is usually only valid for 30 days. At the end of the rental period, the lease is automatically extended by the following period. This is called a monthly rental. The terms of a lease remain valid for the entire term, but the terms of a lease may be modified by either party with sufficient notice. Under normal circumstances, landlords are free to do whatever they want with their property (for a legal purpose), including manipulating it or handing over the property to a tenant for a limited period of time. If one owner is assigned to another (i.e. The tenant) has granted possession, any intervention in the silent enjoyment of the property by the tenant in legal possession himself is illegal. .