Building permit problem

i would offer to pay any taxes that may be due to have the house become legal. They have some wierd rules in spain and geting friendly with the town mare would be an advantage. Half the houses are illegal builds and only become legal once everything is complete and roads / services etc are completed and taxes are paid.This is my understanding as i was going to buy a property in cadiz but could never get my head around that the properties werent legal and only become legal once everytrhing is finished. I have friends around cadiz good spanish friends who have properties that arent legal. Why are many properties in spain left unfinished ie roads unpaved etc? i have driven around and seen millionare mansions left unfinished and doubt they have the correct permits /licences . The casita you mention was a newbuild or a renovation of an existing building ? I would seek advice from a descent lawyer if you havent already done so and i will talk to a friend for his thoughts for you.
Regards
Rob

Thanks to all for your helpful replies.  I will contact a lawyer - a local architect I discussed it with was of the opinion that as the Town Hall had accepted and not returned the fee, or responded to correspondence then I may have a case.  Not sure whether to appoint one from out of the area or a local one who may know the mayor. Whatever I choose to do I will leave it until the Covid situation has passed.