Sorry, I meant to write more but I’m overseas and my internet service crashed. Strictly speaking, depending on local council rules, you shouldn’t be living permanently in a serviced apartment. It all has to do with the size of the windows and other things like corridor widths (honest!).
But how eould anyone in authority know? There will be people who own in or service the building who are making money from obeying the rules. They might be inclined to alert the authorities out of civic duty or spite. Or you might do it for years and no one knows or cares. The thing is, are you prepared to risk being dobbed in and having to move and sell so you can buy somewhere else.
I bet there are people doing it. I just wouldn’t be one of them.