Housing is supply constrained and not tied to labor costs in a significant way. It largely is tied to the price of land in it's location. It's not going to get noticeably cheaper with cheaper labor and materials. Although, I can tell you that the products that one uses in a home have gotten cheaper (fixtures, flooring, etc) with a few exceptions, copper wiring and pipes for instance.
Housing doesn't really fit into the conversation at hand about cheaper labor leading to lower prices.
Something interesting that touches on both of these topics (housing and product cost) is that, if you look at how much of household income is spent on housing and food combined, they stay fairly constant. As commodity goods get cheaper and cheaper, more money is spent on the inelastic and luxury goods.