Everyone is fighting over a new piece of paper from the Federal Reserve. If you log onto social media or watch the evening news, you'll hear that the Biden-era surge in unauthorized immigration completely broke the American housing market. Former President Donald Trump took to his platform to claim that a new Fed working paper proves the migrant wave drove up home prices by 30%. On the flip side, defenders of the previous administration point out that these same workers kept the economy from crashing.
Who is telling the truth?
The reality sits right in the middle, buried under a mountain of data. Economists Daniel Wilson of the San Francisco Fed and Xiaoqing Zhou of the Dallas Fed just dropped a massive working paper titled "The Impacts of Unauthorized Immigration on U.S. Labor and Housing Markets" using restricted immigration court records. It turns out both political sides are cherry-picking the data to suit their narratives. The study reveals a harsh truth about how inelastic housing markets react when millions of people move into a country over a short period.
If you're trying to buy a home or figure out why your rent went up, you deserve the actual facts, not the campaign trail spin.
The Real Numbers Behind the Housing Demand Shock
Let's clear up the biggest misconception right away. The study does not say that illegal immigration made your house 30% more expensive in total. That's a classic misinterpretation of statistical growth rates.
What the economists actually found is that between March 2021 and March 2024, net unauthorized immigration added roughly 7 million people to the U.S. population. In the average American metropolitan area, that specific wave accounted for roughly 30% of the growth in home prices and 20% of the growth in rents during that specific three-year window.
To look at it on a local level, for every 1% increase in unauthorized workers relative to a city's total workforce, local home prices jumped by about 2.2%. Rents in those same areas increased by 1.4%.
Think about what that means for a typical metro area. Total home prices grew by about 22.4% over that timeframe. The immigrant influx accounts for about 6.6% of that total appreciation. That is a significant chunk of money out of your pocket, but it is a far cry from the narrative that immigration single-handedly caused the entire affordability crisis.
The pressure wasn't spread evenly across the country either. The surge clustered heavily in major gateway cities. In the absolute most affected markets, immigration drove up a massive portion of the local real estate inflation. In the typical quiet suburban market, the effect was much smaller, landing closer to 13% of the price growth.
Why the Housing Supply Flunked the Test
You can't blame a demand shock entirely on the people doing the demanding. The real culprit here is a completely rigid, inflexible housing supply chain.
When 7 million people enter a country and need a place to sleep, housing demand spikes instantly. People crowd into apartments, share homes, and sign leases. But you can't build an apartment building overnight. The Fed researchers found exactly zero evidence that local homebuilding expanded to meet this new surge of consumers.
Why didn't builders just put up more structures?
Zoning laws across America are notorious for choking out new construction. High interest rates throughout 2023 and 2024 made financing new projects incredibly expensive for developers. Material costs remained stubbornly high. So when the wave of new residents arrived, they walked into a market that was already suffering from a structural shortage of homes.
It was a perfect economic storm. You have a fixed supply of goods and a sudden, massive influx of buyers. Prices have only one direction to go. The study frames this as a classic short-run demand shock. The local infrastructure simply wasn't built to scale up quickly, leaving native-born buyers and long-term renters competing for a limited pool of units.
The Unexpected Twist in the Labor Market
While the real estate data gives ammunition to border hawks, the labor data in the Fed report offers something for the other side of the aisle. The influx did something unexpected to local economies, it acted as a massive supply shock for workers without destroying local wages.
The study discovered that unauthorized immigrant worker flows increased local employment on a nearly one-for-one basis. A 1% rise in the migrant workforce yielded a 1% rise in total local employment.
For years, a common economic theory suggested that a massive wave of low-skilled labor would displace native workers and crush working-class wages. The data from 2021 to 2024 tells a different story. Because the post-pandemic economy suffered from severe, acute labor shortages in industries like hospitality, agriculture, and construction, these new workers filled open roles rather than pushing citizens out of existing ones. Average wages for local workers didn't see significant downward drops.
There is a catch. The study did find that per capita labor income growth slowed down in these areas. Don't confuse that with individual wage cuts. Per capita income dropped simply because unauthorized immigrants tend to earn lower baseline wages than native-born citizens. When you add millions of lower earners to the statistical pool, the average mathematical income drops, even if nobody actually got a pay cut.
The report also upends another massive political talking point regarding public spending. Areas that saw the largest influx of unauthorized workers actually experienced sharp declines in government transfer payments per capita.
How does that happen?
Working-age undocumented immigrants are legally barred from accessing major federal safety-net programs like food stamps, Medicaid, and unemployment insurance. Because they were healthy, young, and actively working jobs, they weren't drawing from the local welfare systems in the way many critics assumed. They were earning money, spending it on goods, and paying sales taxes, all while being locked out of federal benefits.
What Needs to Happen Next
The data is out, the academic debate is settling, and the political finger-pointing isn't helping anyone secure a mortgage. We have a clear picture of what went wrong. If you want to protect communities from future housing cost spikes, the playbook requires a shift in how we approach development and economic planning.
First, municipal governments must dismantle restrictive zoning laws immediately. If a town cannot legally build multi-family housing or accessory dwelling units, it will never survive a sudden population shift, whether that shift comes from international immigration or domestic tech workers moving away from California. Inelastic supply is a self-inflicted wound.
Second, tracking infrastructure needs to modernize. The Fed economists had to rely on restricted court files to figure out where people went. Local governments are completely blind to real-time demographic shifts, meaning they cannot plan schools, roads, or housing developments until the inflation has already broken the local economy.
Stop looking at immigration as a purely political or moral issue. It is a raw economic force. When millions of people enter the labor market, they build businesses and fill factories, but they also need a roof over their heads. If you don't build the roofs, the price of the existing ones will keep going through the sky.
