Hi there everyone,
I am not a builder or developer but have a pretty good idea of the process of building and selling developments in the UK and Spain. It is very common for plans to change during the build process and hence further permissions must be granted at each stage. in the UK i used to work for a very large developer and their normal strategy was to initially apply for one form of permission that was very likely to be granted by sometimes very difficult planning officers in London (this was normally green or brown field sites) and once planning was in place, they would constantly lobby the council to extend planning further and further to get more value (profit!). The builders would start construction on parts of the site having already factored in the changes they were hoping to be granted.
In Spain, this is less stringent but equally beaurocratic and many licenses need to be in place. Firstly, you would need the land to be classified accordingly, then an approval to build, then an architect's plan would have to be approved, then a license of works granted, etc, etc. At the end you would need a license of occupation - all of these licenses cannot be given until all the previous ones have been completed satisfactorily. I know it sounds worrying but no council can guarantee all the licenses at the start (what if the builder builds substandard property with no infrastructure? will they get a first occupation license - i hope not).
As I understand it, PW have all the paperwork they need for this stage of the work, and must apply for the next stage as and when - but, in principle the town hall understand the project and have committed to granting approval to the whole project. And they are very keen to give it due to the amount of employment and tourist money it is going to bring in to the local area.
I hope this helps, i do not know all the precise details of the different licences but do know this is how it works. Due to many bad experiences and scare stories - people are rightly nervous. With PW I would not be. And no, I do not work for them!!
Jamie