nany rent control laws only limit the possibility for the landlords to increase the rent on existing contracts. Their main objective is to avoid that tenants be “priced out” of their own apartment and forcibly evicted. Considering the large negative externalities of evictions, there are good reasons to argue that some form of rent control is good for the society at large, even if it causes some distortion in the real estate market.
On the other hand, to provide _new_ affordable housing the only long term solution is an increase in the stock of buildings available for rent.