You can assign animals jobs and things though which seems like it would require a town beyond main street. Luckily it'll be out in Japan later this month so hopefully we can find out more either way.
That's wrong though. The Treehouse footage showed them picking a place on the map to build that Deer villager's house and it wasn't an environment but an actual place on the map.
You probably can do that stuff though. Hell we know you can pick jobs and things for animals so it's entirely...