Normally like the vast majority of slums in the world? Most aren't build in areas that were planned out and had infrastructure run so its not like you could call up the water company and have them bill you, there's simply no infrastructure. At least this is my understanding of slums in countries such as Brazil, India and similar where the neighborhood has grown organically.
Ah, but this is a commercial building, just unfinished, in the downtown core. They had to have valid permits, and utility hookups, if they were planning at all to finish the building and rent it to people.
