Hi Joanna, we're nearing the end of a build. It's a complex process! First off all check with your local camara that you can actually build. Is there an existing ruin? This is usualy essential in order to build. We had a ruin and although we knocked it down and built new, we had to apply for a rebuild after we were turned down for a new build project. You have to get the house signed off by a licenced engineer or builder in order for it to be legal. And you must comply with strict regs regarding many aspects such as water supply, septic tank, earthquake and fire resistance, accoustics, etc. So you'll need to find someone to work with you, I have no idea if there's a standard fee for this, I knew someone who paid 125 euros per month to a really helpful engineer. I think it's rarely done but is possible. We have ended up paying an architect and building company to do ours after a failed attempt to try and sort out a self build. And 4 years of frustration! The architect was essential in working with the council and getting us permission, if you afford it, I would say after the camara, an architect is the next vital step. Some camaras are more helpful than others and the regs vary between them. Good luck.