House numbers are assigned by the responsible authority on the basis of building applications, notifications of construction measures or at the request of the owners. Street names and house numbers are used for orientation in the urban or municipal area and fulfill a classification function for all personal or location-related data.

In order to integrate new buildings into an existing house number sequence, it may be necessary to change existing house numbers.

Checking whether a house number has been affixed by the owner of the property/house is the responsibility of the competent authority as the general regulatory authority. The local house number signage is also checked in the event of complaints. The property owner will then be asked to provide a visible house number.

Two equivalent systems are used for the arrangement of house numbers:

• The so-called Paris system with a kind of zipper system (the numbering starts at the end of the street facing the city center on the left side with 1 and on the right side with 2 and then runs separately according to even and odd to the other end of the street, whereby due to the different size of the individual properties it often happens that numbers that are numerically next to each other are not opposite each other in reality).
• The so-called Berlin systemwith circulating house numbering (the number sequence starts with 1 on one side of the street, continues without interruption to the end of the street and then runs back on the other side of the street).

In Lower Saxony, house numbers are usually assigned according to the Paris system.

The installation of house numbers in Salzgitter is regulated by the house numbering statutesPDF-File11,80 kB

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