The Evidence is In: Building More Housing Reliably Lowers Rent

For decades, the American housing market has operated under a simple, painful math: population growth vastly outpaced construction, creating a nationwide shortage of four to seven million homes.[7]

As prices spiraled and homeownership slipped out of reach for millions, a fierce debate emerged over the solution. Supply-side advocates argued that stripping away restrictive zoning laws to allow more construction would naturally cool prices.[7]

Skeptics, however, countered that developers would only build luxury units, enriching investors while doing nothing for lower-income renters—or worse, accelerating gentrification.[7]

Now, in 2026, the theoretical debate is giving way to hard empirical data. Several major U.S. cities have spent the last five to eight years aggressively deregulating their housing markets, providing a real-time laboratory for economists to measure what actually happens when a city builds its way out of a shortage.[7]

The most compelling evidence comes from cities that enacted sweeping land-use reforms before the pandemic. Minneapolis made headlines in 2018 by eliminating single-family-only zoning citywide and abolishing minimum parking requirements for new developments.[2]

The results of the Minneapolis 2040 plan have been stark. While national rents surged by 22% between 2019 and 2024, rents in Minneapolis actually declined by 4% during the same period, proving that comprehensive zoning reform can decouple a local market from national inflationary trends.[2]

Austin, Texas, executed a similar playbook, streamlining permitting, reducing parking mandates, and allowing denser housing along commercial and transit corridors.[2]

Between 2015 and 2024, Austin added roughly 120,000 new housing units—a massive 30% increase in its housing stock that vastly outpaced the national average.[1]

As a direct result of this construction boom, Austin's median asking rent dropped by nearly 10% year-over-year in recent measurements, representing the steepest decline of any major U.S. metropolitan area.[1][2]

The central fear of upzoning critics has always been that new construction only benefits the wealthy. However, recent comprehensive data from the Pew Charitable Trusts challenges this assumption directly.[1]

Analyzing 1,654 ZIP codes across the country, Pew researchers found that in metropolitan areas that increased their housing stock by at least 10% from 2017 to 2023, rent growth slowed significantly compared to stagnant markets.[1]

Crucially, the steepest rent declines occurred in "Class C" apartments—older, non-luxury buildings that typically house lower-income residents. In Austin, rents in these older buildings fell by roughly 11% from 2023 to 2024.[1]

This phenomenon occurs because of a mechanism economists call "filtering," which describes the chain reaction of moves triggered by new construction.[6]

When a developer builds a high-end apartment building, it is rarely occupied by people moving out of subsidized affordable housing. Instead, it attracts higher-income renters who vacate middle-tier apartments.[6]

Those middle-tier units then become available to moderate-income renters, who in turn vacate older, lower-tier units. A landmark study by economist Evan Mast tracked 52,000 urban residents to map these migration chains.[6]

Mast found that for every 100 new market-rate homes built in a high-income neighborhood, between 45 and 70 homes are eventually freed up in below-median-income neighborhoods, preventing wealthy renters from bidding up the prices of older stock.[6]

Despite the strong data from high-growth cities, the evidence that upzoning is a universal panacea remains mixed in certain contexts. Urban planner Yonah Freemark's research highlights that upzoning's success is highly dependent on local market conditions; in "weak-market" neighborhoods, simply changing the zoning code does not automatically spur developers to build.[4]

Furthermore, studies of neighborhood-level rezonings in cities like New York found that upzoning lower-income areas without accompanying tenant protections can temporarily increase land values and displacement pressures before new supply comes online.[3]

A 2025 study from the National Bureau of Economic Research also cautioned that easing supply constraints might not yield anticipated affordability if local income growth continues to skyrocket, as high incomes inherently drive up housing costs regardless of zoning.[5]

Ultimately, the emerging academic consensus suggests that while upzoning is not a standalone cure, it is a necessary precondition for housing affordability. When paired with targeted subsidies for the lowest-income renters, removing barriers to construction remains the most proven method for stabilizing the housing market and providing relief to renters across all income brackets.[3][7]