The Conservative-controlled Andalusian regional government has said it would not enforce central government's new rules on renting out properties, which are expected to be approved soon.
On Friday the president of the Junta de Andalucía, Juanma Moreno, criticised the central government for planning the future law without "consensus or dialogue" with the regional authorities and said that his government would "always guarantee" the protection of property owners.
The PSOE Socialist party and Unidas Podemos (UP) coalition reached an agreement last week to introduce restrictions on renting out homes to try to stem big rises in rents in some areas, especially larger cities.
The rules had been a demand of left-wing UP to enter the coalition government, and now next year's budgets need their approval, the PSOE has found a way to bring them in.
Measures include the right for mayors to charge a 150% surcharge on local IBI tax for empty homes and people who rent out 10 homes having to reduce rents to a local average.
Critics, including parties on the right, say the move will make people take homes off the market and make the situation worse.