Latest / The Demographics Podcast with Fexingo: Aging Populations, Birth Rates, and Economic Impact / How Falling Birth Rates Reshape the Construction Industry
Transcript
- Lucas: In Japan, the number of new homes started each year has fallen from about one point two million in 2000 to around eight hundred thousand in 2025. That's a drop of roughly a third — and the main driver isn't a housing bubble or a recession. It's simply that there are fewer young people to buy them and fewer young workers to build them. Luna: So the construction industry is getting squeezed from both sides — falling demand and falling labor supply at the same time. Lucas: Exactly. And we're starting to see the same dynamic play out in other rich countries. In the United States, the median age of a construction worker is now forty-two — that's up from thirty-six in the mid-1990s. The share of workers under twenty-five has fallen from about fifteen percent to under ten percent. Luna: And that's not just a statistic — it has real consequences. If you've tried to get a contractor for a home renovation in the last few years, you've lived it. Longer wait times, higher bids, fewer people showing up. Lucas: Right. And the interesting thing is, construction is one of the industries where automation has been slowest to arrive. You can't easily replace a framer or a roofer with a robot on a messy, custom job site. So as the workforce ages out and fewer young people enter, the labor shortage just gets worse. Luna: It's a classic demographic trap — and one that touches something everyone needs: housing. I mean, if walking through the economy with us has made something click about how these trends connect, we'd love your help keeping this show going. This podcast is ad-free and listener-supported, and a small contribution at buy me a coffee dot com slash fexingo really does make a difference. No pressure, just if it feels right. Lucas: Yeah, second that. It's what keeps us digging into angles like this. So — Japan is the clearest case study. They've been dealing with population decline for longer than anyone. Let's look at what's actually happened to their construction sector. Luna: What's the headline number? Lucas: The construction workforce in Japan has shrunk by about thirty percent since the peak in the late 1990s. And the average age of a construction worker there is now over forty-six. That's older than the average for all Japanese workers, which is already the oldest in the world. Luna: So builders are literally getting older faster than the rest of an already aging population. Lucas: Yes. And the response has been interesting. Japan has invested heavily in prefabricated and modular construction — factory-built homes that require fewer on-site workers. Companies like Sekisui House and Daiwa House now produce a large share of new homes off-site. Luna: Has that filled the gap? Lucas: Partly. But prefab still requires skilled labor to install, and the total number of homes built keeps falling. There's also been a push to attract more women and older workers into construction — but the numbers haven't turned around. Luna: Let's bring it back to the U.S. What's different here? Lucas: The U.S. still has a younger overall population than Japan, but the construction workforce is aging fast. The National Association of Home Builders reported that in 2024, about twenty percent of construction workers were over fifty-five. That's up from twelve percent in 2000. Meanwhile, the share of workers under thirty-five dropped from about forty percent to under thirty percent. Luna: And immigration has historically been a big source of younger construction workers. Is that changing? Lucas: It is. Foreign-born workers make up about thirty percent of the U.S. construction workforce. But immigration rates have slowed, and policy debates create uncertainty. In states like Texas and Florida, where housing demand is high, builders are increasingly competing for a shrinking pool of workers. Luna: Which pushes up wages — but also pushes up home prices. Lucas: Right. And that's the economic feedback loop. Higher labor costs mean fewer new homes get built, which pushes up prices on existing homes, which makes housing less affordable for the young families that would be having the kids that eventually become the next workforce. It's a self-reinforcing cycle. Luna: So the construction labor shortage isn't just a side effect of falling birth rates — it's also a cause of further decline in birth rates, because housing costs are a major factor in family formation decisions. Lucas: That's the cruel irony. And it's not just single-family homes. Multifamily construction is also affected. Apartment buildings take longer to build and require more coordination. In cities like San Francisco and New York, project timelines have stretched by months just because contractors can't staff the sites. Luna: Are there any places that are bucking the trend? Markets where construction labor is still plentiful? Lucas: Sub-Saharan Africa has a very young population and rapid urbanization, so construction there is booming. But the capital and materials are often imported, so it's a different dynamic. In Europe and East Asia, the pattern is pretty consistent: fewer young workers, higher costs, slower building. Luna: What about technology? You mentioned prefab in Japan — are there other innovations that could change the equation? Lucas: There's a lot of interest in construction robotics — bricklaying robots, autonomous excavators, 3D-printed houses. But the adoption has been slow. A company called Built Robotics has retrofit kits for bulldozers, and Apis Cor has 3D-printed small homes. But these are still niche. The upfront cost is high, and many building codes haven't adapted. Luna: So the near-term prospect is just more of the same: rising costs, slower construction, and an older workforce. Lucas: I think so. Unless immigration policy changes significantly or automation takes a leap, the construction labor shortage is going to be a structural feature of the economy for the next decade at least. And that has huge implications for housing affordability, infrastructure, and even disaster recovery — think about rebuilding after hurricanes or wildfires with fewer workers available. Luna: That's a sobering note. But it's also a reminder that demographics aren't just about retirement or healthcare — they touch every corner of the economy, even the literal ground we build on. Lucas: Exactly. Next episode, I want to look at a related angle: how falling birth rates are reshaping the demolition and deconstruction industry. Because if you're building fewer new homes, you're also tearing down fewer old ones. Luna: That's a great segue. Until then.