Totally possible. Though getting data out of WebGL can be hairy. And actually getting on the rooftops of the ideal buildings is a whole nother story.

Make ease of access (and how much it's wanted there, and so on) part of the fitness function, too :)

And future configurations could also take into account how many things you'd have to move, or whatnot (I have no idea about what you're doing, I just imagine that's not something you do once and never change, right?).