Homebuilders are steering fewer projects toward the biggest cities in the country, and the shift has gone on long enough now that it counts as a trend rather than a blip. Fresh data from the National Association of Home Builders shows single-family construction in the core counties of major metro areas has lost ground for a fifth consecutive quarter, while crews increasingly break ground in small towns and outlying counties that barely registered on builders’ radar a decade ago.
The Numbers Behind the Shift
In the second quarter of 2026, large metro core counties saw their share of national single-family construction fall by 1.3 percentage points to just 14.6% — a new low for NAHB’s Home Building Geography Index, which the association’s economists have tracked since 2018. It’s the fifth quarter in a row that the country’s densest urban cores have lost construction share, according to reporting on the index published this month.
NAHB’s index sorts every U.S. county into one of seven categories, from large metro core counties in cities like New York or Chicago down to entirely non-metro rural counties, using classifications built on Census Bureau metro-area definitions. That structure is what makes the multi-quarter comparison meaningful: it isn’t measuring city limits, but the broader economic orbit each county sits in, which is why a “small metro outlying county” can still be firmly suburban in character even though it doesn’t touch a major city’s downtown.
This isn’t a one-quarter anomaly. Large metro core counties have now posted five straight quarters of decline in single-family construction share, a stretch spanning well over a year of shrinking urban-core building activity. For an index that only goes back to 2018, five consecutive quarters moving the same direction is a meaningful signal, not noise.
Small metro outlying counties — the kind of places with one stoplight, a diner, and a 45-minute commute to the nearest big employer — posted the opposite trend. Their share of single-family building climbed 0.8 to 0.9 percentage points to 10.9%, according to an analysis of the same NAHB report, marking the category’s first real gain in roughly a year.
Why Builders Are Looking Past the City Limits
NAHB economist Catherine Koh, who authored the geography index report, put it plainly: “The geographic composition of single-family construction continued to shift toward smaller and less densely populated markets.” Land in and around major urban cores has only gotten harder to secure and permit, and builders chasing thinner margins are following buyers who’ve already left for cheaper ground.
Multifamily construction is telling almost the opposite story right now, expanding in most geographic categories even as single-family activity contracts — a split that suggests the apartment boom and the exurban single-family boom are two separate reactions to the same affordability squeeze, just playing out in different corners of the map.
Where the Building Is Actually Happening
Small metro outlying counties aren’t the only ones picking up the slack. Large metro suburban counties — the traditional suburbs ringing major cities — have held up better than their urban cores, suggesting builders aren’t necessarily abandoning metro areas altogether so much as pushing further from downtown and toward smaller metro areas entirely. The pattern lines up with years of migration data showing households moving from expensive coastal metros toward more affordable regions in the Sun Belt, the Southeast, and parts of the Midwest, where land and labor costs leave more room for builders to turn a profit on entry-level and move-up homes alike.
What It Means If You’re House Hunting
If you’ve noticed new subdivisions popping up in towns you’d never have considered five years ago, this is why. Inventory in small and outlying metro areas is growing faster than in big cities, which should eventually translate into more choice and softer price competition for buyers willing to look past the urban core. It also means resale values in those smaller markets may hold up better than skeptics expect — builders don’t keep redirecting resources somewhere unless the demand backs it up.
For sellers in large metro cores, the flip side is worth watching too. Less new competition from builders isn’t automatically good news if it partly reflects buyers simply choosing to live elsewhere. Either way, the geography of American homebuilding looks less like a temporary pandemic-era blip and more like a five-quarter-long redirection of where the country is actually growing.
