> "The Berlin Senate’s ruling nonetheless reflects a general feeling across a city in which homes are getting harder to find: Berliners have had enough and they want their city back."
Translation: There is no pricing mechanism on rents in the city and it is becoming increasingly impossible to find an apartment.
While it's certainly true that AirBnB essentially allows landlords to flout the law, it's worth noting that the adverse effects of price ceilings on supply are the root cause of Berlin's problems and this will not solve the underlying problem of rents being far from equilibrium.
Maybe there is some other cause (e.g. everyone wants to live in a city now)?
Meanwhile many fewer homes are being built. The largest drop has been in building by local authorities, which used to account for almost half of all new builds before Thatcher brought things to a halt in in the 1980's by selling off social housing and preventing councils from investing the proceeds. (See: http://www.lrb.co.uk/v36/n01/james-meek/where-will-we-live)
As real wages have stagnated for most people, multiple administrations have propped up demand through ever inflating house prices. People feel richer when their home goes up in value but this wealth is illusory, nothing new has been created, only a generational shift in capital as young people are forced to fork out ever more of their income in rent.
The private rental market in the UK is all short term lets, after the first year the landlord is free to adjust the rent. With council housing now largely gone it's an unanchored free market. Restricting supply (e.g. through difficulty obtaining planning permission) while demand increases does of course drive up rents.
Property prices are a function of interest rates and rents. Credit conditions come into play here in determining how much a prospective home owner or buy-to-let investor can borrow and pay for a property.