Once you arrive in Italy, you can convert this Visa into a Permesso di Soggiorno (Residency Permit). These run for between one and five years, depending on the nature of your application and your plans. You should start this process within eight days of your arrival in Italy. You can collect an application ‘kit’ at your local Post Office, and then take the completed kit with all supporting documents to the Questura (Police Headquarters).
After you have your Permesso di Soggiorno, you can register your permanent address with the Comune where you live, as described in the section below.
For the official line on this process, visit this official guide to obtaining a Residency Permit.
For an insider account, and to warn you in advance that the process is lengthy and can be frustrating, here is an account by an American who obtained a Residency permit in Rome a few years ago.
We strongly recommend enlisting the help of an Italian speaker who understands the process, and of course, we are here to help all of our clients.
A Permesso di Soggiorno costs between €70 and €130 depending on the duration, plus a €16 stamp, called a Marca da Bollo, which you can buy from many tobacco stores.