IIRC Spain's rent control is just 5 years, which means that building newly required density is delayed by 5 years at most. It's a nice stabilizing mechanism be

IIRC Spain's rent control is just 5 years, which means that building newly required density is delayed by 5 years at most. It's a nice stabilizing mechanism because nobody wants to move every year just to get the best rent, but most people can handle a move every 5 years.