The United States is failing to build enough homes to keep up with shrinking household sizes and steady population growth, resulting in a historic supply shortage and spiraling vacancy rates, according to a new analysis from the Federal Reserve Bank of St. Louis.
The research reveals a cumulative national housing shortfall of 3 million to 5 million units since the 2008 financial crisis. Building permits per capita currently sit 35% below the historical average, leaving the real estate market in a state of intense competition that continues to suffocate affordability.
The St. Louis Fed study paints a stark picture of a construction sector unable to meet demographic demands. According to the researchers, building permits stood at just 4.3 per 1,000 people in 2024. That figure is not only well below the 1960-2000 average of 6.6 permits per 1,000 people, but it represents a 59% drop from the 1972 peak of 10.6.
The study identifies a constrained supply pipeline choked by several entrenched factors. The construction workforce never fully recovered after the 2008 housing crash, leaving builders with persistent labor shortages. Compounding the issue are rising material and land costs, as well as stringent regulatory barriers — including zoning restrictions and lengthy permitting processes — that limit where new developments can break ground.
The crisis is further exacerbated by a fundamental shift in household sizes. The St. Louis Fed researchers highlighted that the average U.S. household size has shrunk by nearly 24% over the past six decades, falling from 3.37 people per household in 1965 to 2.57 in 2024. Because fewer people are living under one roof, the nation inherently requires significantly more housing units to shelter the same population size.
With construction failing to keep pace with these household formations, inventory has effectively evaporated. St. Louis Fed data shows homeowner vacancy rates plummeted to a record low of 0.95% in 2024. Meanwhile, rental vacancy rates dropped to a tight 6.8%. The report notes that these historically low vacancies signal a highly competitive market that gives sellers and landlords outsized pricing power.
The predictable consequence of this supply-demand mismatch is soaring housing costs. The analysis points out that median home prices have skyrocketed roughly 207% since 2000, while per-capita incomes rose only 155% during the same period, putting homeownership increasingly out of reach for average families in the U.S.
Ultimately, the Fed economists concluded that addressing the nation’s housing affordability crisis will require more than just demand-side interventions like interest rate adjustments or homebuyer subsidies. To truly fix the imbalance, policymakers and industry leaders must tackle the zoning regulations and labor constraints that are actively restricting the country’s housing supply.
