Ideal way of getting around the attractive nuisance problem, with supervillains showing up to pick fights and establish themselves as powerful, since they would all be in it together. (With generous provision for the widows and widowers of superheroes, and other people who might find themselves targeted.)
With, of course, super-zoning requirements.
At first I was thinking that the houses would be required to be built for supers, but then it occurred to me -- which supers? A flame-powered one, a super-strong one, a speedster? Is there even anything you would require in your home if you were a speedster?
Perhaps all the homes would have to constructed in a way to be easily modifiable. (Especially if kids could abruptly turn out to be superpowered, and not with parental powers.) "Easily" as defined by using, probably, techniques devised by Gadgeteers, that underrated and immensely powerful case of superpowers.
They'd probably have to do it anyway. Sensible supervillains would avoid Super City as the place where you'd be ganged up on in three seconds on a slow day, but supervillainy probably doesn't appeal to the sensible. Houses would have to be built to withstand danger and be swiftly restored.