There is a wonderful site
www.reformagkh.ru . On it you can find a management company assigned to the house, how much money, what is spent on it and so on. But apart from this, you can learn various interesting things about our country as a whole, for example, the date of its construction is indicated on each site’s website, so you can see how Moscow was built since 1900:

An even more epic picture is obtained if you look at Russia entirely:
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It can be seen that at some point there is an “explosion” - this is the post-war period. In the 90s, new homes are almost never built, since 2000 growth begins. By the way, where do the peaks come from in 1916 and 1941? And what is this splash in the early 60s?

For many homes there is information about the number of floors. Since the 60s, there are many five-story building - they are Khrushchev. I wonder why there are almost no houses with a height of 11, 13 and 15 floors? And why recently 3-storey houses are popular?

If you put the height of houses on the map, you can get a general idea of ​​the city:

In addition to the number of floors there is information on the number of apartments. Probably, the "grooves" in the picture correspond to some models of buildings. You can study the history of the architecture of residential houses in Russia for the XX century:

On the map, the number of apartments can help identify areas where more people live:

For many houses the corresponding area for parking is indicated. Therefore, you can estimate where there is parking, and where not. Interestingly, the areas barely mix:

For some houses, an indicator of some energy efficiency is known. I think this is something like the number of watts per square meter. Again it is interesting that the areas do not mix:

All images with maps are obtained using the magnificent
cartodb.com . It's amazing how with such a simple interface it turns out to do such non-trivial visualizations. The data can be found in the repository
github.com/alexanderkuk/analyze-reformagkh/blob/master/data.csv . Code in the same
github.com/alexanderkuk/analyze-reformagkhThe site has a bunch of other indicators about the house: the type of foundation and walls, information about the management organization, various financial indicators. If someone is interested to see how it is all distributed across the country, write, discuss.