Mehrfamilienhäuser – Frage

House numbers?

In German streets, usually one of two numbering schemes is used:

Most commonly, one side of the street has odd numbers, and the other has even numbers, and on both sides the numbers increase by 2 with every building/plot/entrance. Alternatively, but much less commonly, on one side the numbers increase by 1 in one direction, and at the end, the numbers loop around and come back the other side, increasing by 1 in the opposite direction:

1-3-5-7- 9
==========
2-4-6-8-10

1 -2-3-4-5
==========
10-9-8-7-6

The scheme with the house number marking a distance from some reference point, popular e.g. in North America, is not used. In case of later additions or splitting up plots originally intended for just one building/entrance, you get numbers with an added letter (24, 24a, 24b, 24c), or with a slash (or hyphen, space, …) and an extra number (6, 6/1, 6/2, 6/3), and in case of buildings with just one entrance spanning multiple original plots, a number range is sometimes used (22-26).

In theory, [there is a law](https://www.gesetze-im-internet.de/bbaug/__126.html) that requires each building to display its number. In practice, I’ve seen lots of buildings without a visible number. As long as postal workers, other delivery people, and visitors can easily identify the building (e.g. from the numbers of surrounding buildings), this doesn’t create too many problems.

The building in your screenshot has entrances numbered 48 thru 56 and is located in a street following the first (odd-even) scheme.