In the last decade, Catalonia has become one of the main laboratories for housing regulation in Spain. The puzzle of the housing emergency has left behind a trail of measures promoted by the administrations to protect the most vulnerable households, expand the stock of social housing, or contain rents amid the unstoppable rise in prices, while new rules have been introduced to define who is a major holder or to limit the use of seasonal contracts. The latest of these laws promoted by the Generalitat, against the “speculative purchase” of properties, did not pass the examination of the Consell de Garanties Estatutàries this summer. The Catalan government has committed to modifying the regulation, which has been strongly criticized by employers’ associations and real estate sector entities, as they consider it will worsen the supply crisis. While property owners warn that overregulation has generated even more legal uncertainty, the movement for the right to decent housing alerts to the loopholes in these regulations.