To add to what I said, since I can't edit the post on my phone...
We didn't see them finished in 1.0 but there was a place up north on the map of Gridania that had a zone with a bunch of buildings much like the zone for the market ward. If you ran up there it said, "you cannot proceed any further." I'm going to assume this is where mog houses would have been. It's set up exactly like MH's in XI. Where people were confined in one area for housing.

I think the housing in xiv will be so much more fun, as it seems the area is a different place from the cities themselves.