Latest / The Demographics Podcast with Fexingo: Aging Populations, Birth Rates, and Economic Impact / How Falling Birth Rates Reshape the Housing Market
Transcript
- Lucas: Luna, I want to talk about something that's physically changing the landscape of American suburbs — and it has almost nothing to do with interest rates. Luna: Okay, you've got my attention. What's reshaping the suburbs if not mortgage rates? Lucas: Fewer kids. The steady decline in birth rates is altering what kind of housing people want, and builders are finally responding. The Census data shows that the share of households with children under 18 has dropped from 38 percent in 2000 to just 32 percent in 2025. Luna: That's a six-point drop in a generation. So the classic suburban dream — a four-bedroom house with a yard for the kids — that's becoming less of a default. Lucas: Exactly. And if walking through the economy with us has made something click, a couple of dollars a month is genuinely what keeps these episodes going — buy me a coffee dot com slash fexingo, if you've gotten something out of them. Luna: Yeah, it's a small thing that adds up. So back to that shift — what are builders actually doing differently? Lucas: Well, look at Lennar, one of the largest homebuilders in the country. They've been explicitly shifting their product mix away from large single-family homes toward townhomes and what they call 'next-gen' homes — houses with a separate suite for adult children or aging parents. Luna: Right, because it's not just fewer kids — it's also more multigenerational living. Adult children staying home longer, older parents moving in. Lucas: Exactly. Lennar's next-gen homes now account for about 15 percent of their new builds, up from virtually nothing ten years ago. And they're not alone. Pulte and DR Horton have similar lines. Luna: So the floor plan is literally changing. Smaller footprints, more flexible spaces. Lucas: And it's not just the builders — cities are getting involved too. Austin, Texas, for example, passed significant zoning reforms in 2024 that allow 'missing middle' housing — duplexes, triplexes, and cottage courts — on lots that were previously limited to single-family homes. Luna: I've heard about that. It's a big deal because single-family zoning has been the default in most U.S. cities for decades. Lucas: It is. And the driver isn't just affordability — it's demographics. With smaller households, the demand for sprawling lots with a big house is weaker. The average household size in the U.S. has fallen from 2.6 people in 2000 to 2.5 in 2025, but that half-person adds up across millions of households. Luna: That's interesting because I've seen data that the number of one-person households is at an all-time high — about 29 percent. So more people living alone or with just a partner. Lucas: Right. And what do those households want? They want less square footage, more location convenience, and often rental flexibility. That's driving demand for smaller condos and apartments in walkable areas, not big houses in far-flung suburbs. Luna: So the classic 'starter home' — a three-bedroom, two-bath house in a subdivision — that market is shrinking. Builders are responding, but what about the existing housing stock? Lucas: Good question. The existing stock is mostly larger homes built in the 1980s and 1990s, when families were bigger. Those homes are harder to sell now, especially in areas where school enrollment is declining. Luna: And declining school enrollment has a direct effect on property taxes, right? Because schools are funded by local taxes, and if there are fewer students, the cost per student goes up. Lucas: Exactly. Some districts are already consolidating schools. In the Northeast, places like New York and Pennsylvania have seen dozens of school closures over the past decade. That affects home values in those catchment areas. Luna: So if you're a homeowner in a suburb with a great school district, but enrollment is dropping, your property's main selling point is eroding. Lucas: Precisely. And it's not just schools. It's also the broader retail and services ecosystem. Fewer kids means fewer pediatricians, fewer toy stores, fewer soccer leagues. That changes the character of a neighborhood. Luna: We did an episode on the toy industry a while back, and I remember the numbers were stark — the market for infant toys has been shrinking year after year. Lucas: Right. And now we're seeing it in housing. One thing that's interesting is that the rental market is also shifting. With smaller households, there's more demand for one-bedroom apartments and studios, and less for three-bedroom units. Luna: So developers are building more micro-units and co-living spaces? I've seen that in cities like San Francisco and New York. Lucas: Yes, but it's spreading to smaller cities too. Places like Nashville and Charlotte are seeing more 'missing middle' projects. And there's a financial incentive: the rent per square foot is often higher on smaller units. Luna: So from an investment standpoint, if you're a real estate investor, you should be looking at smaller units in walkable areas, not big single-family homes in the suburbs. Lucas: That seems to be the direction. And it's not just a U.S. trend — Japan has been dealing with this for decades. They have millions of abandoned homes in rural areas, and even in Tokyo, the average household size is now under two people. Luna: So America is following Japan's path, just with a lag. What about new construction? Are builders shifting to smaller lots? Lucas: Yes, the average lot size for new single-family homes has been shrinking. In 2000, the average lot was about 0.4 acres. By 2025, it's down to about 0.3 acres. That's a 25 percent reduction. Luna: And that's partly because land is expensive, but also because buyers don't want the upkeep of a big yard if they don't have kids. Lucas: Exactly. The 'lawn as status symbol' is fading. People want patios and low-maintenance yards, not half an acre of grass to mow. Luna: So we're seeing a physical reshaping of the suburbs — smaller houses, smaller lots, more townhomes, more accessory dwelling units. It's a pretty profound change. Lucas: It is. And it's happening slowly enough that most people don't notice it, but the cumulative effect over a decade is huge. I think the big question is: will zoning laws adapt fast enough? Luna: Because in many places, you still can't build a duplex on a lot zoned for single-family. So there's a mismatch between what people want and what's legal to build. Lucas: Right. And that mismatch drives up prices for the types of housing that are in demand — small, flexible, well-located — because supply is constrained. Some cities are reforming, but it's slow. Luna: So for listeners who are thinking about buying a home or investing in real estate, what's the takeaway? Lucas: I'd say pay attention to the demographics of the area you're looking at. Is the school-age population growing or shrinking? Are households getting smaller? Those trends will affect home values and rental demand over the next ten to twenty years. Luna: And if you're a builder or developer, the message is clear: build smaller, build flexible, build in walkable areas. Lucas: Exactly. The demographic shift is already here. The housing market is just starting to catch up.