Thanks to the searching engine under here, you can view the list of all the offers available on Sportello Casa at the moment, though you can't see the addresses of the accommodations as well as the contacts of the offerers. To see this information you have to register on this site (registration is free) or go to Sportello Casa office.
Search for reference number
If you have a reference number, you can use the dedicated fields to view the details about the offer you're interested in
search for accommodation features
Do your search according to the features of the accommodation