(Li.2) The construction agreement is more than just a piece of paper
Before starting constructions one need an agreement with one or several constructors. That is not a problem in Italy. As long as you find the right people, do have a professional and precise description of the wanted construction and do make text in Italian. One will not find many English speaking Italian constructors.
But in general, at least in our area, working with Italian companies is a very, very positive experience. They are hardworking, cheap, careful and reliable.
But be aware that sometimes some unforeseen problems can show up. In this case no one knows if digging down which is needed, one will have to deal with hard rock expensive to remove or easy cheap gravel.