Published by negative internal migration balance
The IW Cologne throws an interesting look at the current intra-German migration movements Short report 20 / 2019, After that, all German cities are growing. But not if you look only at the native population. In this case, there is a tendency to move from the city to the countryside. The introductory comment on his website, the IW Cologne overwrites the words appropriately "The new city escape", For the population growth, especially young immigrants and immigrants. In contrast, families are increasingly moving into the surrounding countryside of the big cities.
One reason: the high rental rates
As reasons for the urban exodus of the indigenous population, the study names the scarce housing supply, rising rents and rising house prices. The cities are very attractive for the younger population from the rather rural area. After the founding of a family there is a need for the extension of the apartment; at current prices, a home in the urban area for growing population shares is no longer affordable, so look around the surrounding area. That's good for the surrounding area.
another reason: protected areas prevent condominiums ...
These considerations are certainly correct. But I think, there is no essential supplement, especially for the Berlin area. In recent years, a number of new environmental protection areas have been identified, and now they are across the globe 56, In such areas, the division of dwellings, ie the creation of condominiums, is subject to the grant of an official permit. The usual administrative practice is that such authorizations are not granted unless it is compulsory for legal reasons.
The consequence is that significantly less condominiums are created than are in demand.
... and thus the development of the city in harmony with the life of the inhabitants.
With the foundation of a family not only the space requirement grows, but at about the same time also a need arises for old-age provision and protection of the family for the future, ie: the purchase of home ownership. In the environmental protection areas, this does not work, which means that the population living there has to move if they want to buy. Since there is no offer in the vicinity because of the environmental protection area, one has to move out of the neighborhood anyway. Then you can indeed look behind the city limits in Brandenburg something, there are future anyway anyway it is cheaper there.
If, on the other hand, it had been possible to find purchasable property in the vicinity of the previous home, most people would tend to buy there despite the higher prices - at least that is what the assessment from our consultations at House & Land, Because the low interest rates allow this financially, the preservation of value is more guaranteed in inner city location than in the surrounding area and one is rooted in its neighborhood, the entire social environment is there, the kindergarten or school, the other parents, the previous life. However, this social environment is also reversing sooner or later, for the same reasons.
In this way, the population that you are trying to protect is sustainably motivated to leave the city.