Why housing got so unaffordable - and who benefits from keeping it that way

A family earning the actual national median income needs about 32% of that income just to cover the mortgage on a median-priced new home this year. A family earning half the median - which describes a genuinely enormous share of the country - would need 65% of its earnings to carry the same payment. Most housing economists consider anything above 30% “cost-burdened.” Half the households in America aren’t stretched by this math. They’re mathematically excluded by it, full stop, before a single conversation about lifestyle or budgeting even starts.

The ratio behind that number tells you this isn’t a temporary rough patch. The national home-price-to-income ratio sits at roughly 5.08 right now, against a level around 2.6 that’s generally considered the ceiling for genuine affordability. In 1980, that ratio was 3.65. Since then, home prices have climbed 551% while incomes climbed 373% - a gap that compounds every single year it persists, which is exactly what it’s done for well over four decades running. Not one of the fifty largest US metro areas currently clears the affordability threshold. Not one.

So who gets blamed, and who actually benefits - because those turn out to be two different lists, and the mismatch between them is the most interesting part of this whole story. The popular villain, the one that generates the angriest headlines and the most satisfying targets, is the Wall Street landlord: private equity firms and institutional investors buying up single-family homes by the thousand, pricing out ordinary families who can’t compete with an all-cash corporate bid. It’s a real phenomenon, and this year it finally produced real federal legislation - a new housing law barring the largest institutional investors, defined as those already owning 350 or more single-family homes, from buying additional ones. Here’s the number that undercuts the entire premise of that fight, though: those mega-investors collectively own about 0.66% of the nation’s single-family homes. Two-thirds of one percent. You could confiscate every single one of those homes and redistribute them tomorrow and barely move the affordability needle, because the villain everyone agreed to be furious at was never large enough to be the actual cause.

The much bigger, much less politically satisfying culprit is zoning - specifically, the accumulated decades of local land-use rules that make it flatly illegal to build the kind of housing that used to keep prices in check. Multi-family buildings, duplexes, smaller starter homes on smaller lots: all restricted or banned outright across huge swaths of the most expensive metro areas, not by any single dramatic decision but by thousands of small, boring zoning votes stacked up since the mid-twentieth century, most of them originally justified by concerns that had nothing to do with housing supply. The supply math shows up exactly where you’d expect: the number of homes on the market affordable to a household earning $75,000 or less has fallen 60% compared to just a few years earlier, and the stock of rental units renting for under $1,000 a month has shrunk by roughly 7 million units over the past decade, even as new rental construction kept getting built - just concentrated almost entirely in higher-rent categories, because that’s what current zoning and financing incentives reward building.

This year’s new federal housing law actually leans into that harder truth more than its investor-ban headline suggests: it ties federal infrastructure and transportation funding to local zoning reform, requiring municipalities to show real commitment to increasing residential density if they want the money. That’s a genuinely significant lever, because it attacks the actual mechanism - artificial supply restriction - rather than the more visible but smaller-scale investor story. It’s also the provision that will generate a fraction of the news coverage the investor ban gets, because “we tied your highway funding to your zoning code” doesn’t produce the same clean villain that “we stopped hedge funds from buying houses” does.

Which gets at the actual answer to “who benefits from keeping it this way,” and it’s an uncomfortable one precisely because it’s not a distant corporate villain - it’s existing homeowners, as a voting bloc, defending the value of the asset most of them hold the majority of their net worth in. Every zoning restriction that blocks a new apartment building or a duplex conversion in an existing single-family neighborhood is, among other things, a wealth-preservation mechanism for the people who already own there. Local governments benefit too, in a narrower way: keeping housing scarce and expensive keeps property tax revenue high without expanding the number of students, cars, or service demands the town has to fund. None of that requires anyone to be malicious. It requires ordinary people voting in their own financial self-interest at the local zoning-board level, repeated across thousands of towns for decades, which is a far less satisfying story than a hedge fund villain but a far more accurate one - and far harder to build a coalition against, because the people benefiting from the status quo aren’t a distant institution. They’re your neighbors, at the zoning meeting, defending the value of their own house.