A surge in home construction across six major U.S. metropolitan areas is primarily delivering large, expensive houses and high-end rental apartments, a new analysis reveals. This trend is failing to address the critical need for affordable housing for low- and middle-income families, creating a widening gap in the market.
The study, conducted by the Georgetown University Center on Poverty and Inequality, examined housing development in Atlanta, Dallas, Houston, Phoenix, Seattle, and Washington, D.C. While these cities are building new homes at a rate faster than the national average, the type of housing being built is increasingly out of reach for the average buyer or renter.
Key Takeaways
- New home construction in six major U.S. metros is outpacing the national average.
- The new housing supply is dominated by large, four-plus-bedroom homes and small, expensive rental units.
- This trend limits options for first-time homebuyers and middle-income families, exacerbating affordability issues.
- Experts suggest market forces alone are insufficient and call for policy changes to encourage diverse housing types.
A Tale of Two Housing Markets
In the bustling real estate markets of America's Sun Belt and coastal hubs, construction cranes dot the skyline, signaling a boom in residential development. From 2010 to 2023, these six major metro areas saw their housing stock grow significantly, with new units accounting for between 12.7% and 22.4% of their total inventory. This figure is well above the national average of 11.35% for the same period.
However, a closer look at the data reveals a troubling pattern. The new construction is creating a polarized market: sprawling homes for the wealthy and compact, pricey apartments for high-earning renters. This leaves a significant portion of the population with dwindling options.
The shift in the size of newly built homes is stark. For homes constructed since 2010, nearly 59% feature four or more bedrooms. This is a dramatic increase compared to the housing stock from the 1980s, where only 33% of homes were that large. This focus on larger, more expensive properties effectively sidelines potential buyers looking for smaller, more affordable starter homes.
The Missing Middle
The problem isn't just confined to the for-sale market. The rental sector shows a similar trend, with new developments consisting mainly of large multifamily buildings with small units aimed at high-income tenants. According to the Georgetown study, a staggering 55% of the newest rental housing is occupied by moderate- to high-income renters.
What is 'Missing Middle' Housing?
"Missing middle" housing refers to a range of multi-unit or clustered housing types compatible in scale with single-family homes. This includes duplexes, triplexes, townhouses, and courtyard apartments. These options provide more affordable homeownership and rental opportunities and increase housing density in a gentle way that fits into existing neighborhoods.
This leaves a significant gap in the market for what urban planners call "missing middle" housing—options like duplexes, triplexes, and townhomes that can provide more affordable pathways to homeownership and renting. The report found that just under 4% of new owner-occupied units built in these cities fell into this denser housing category.
"The private sector isn’t meeting the needs for lower-income households, and probably not the middle class, either," said Lelaine Bigelow, executive director of the Georgetown Center on Poverty and Inequality. "Just focusing on supply alone won’t reach those who are struggling most."
This lack of diversity in new housing stock means that as wealthier individuals move into new, larger homes, the smaller, older homes they leave behind are not always becoming available or affordable for the next tier of buyers. Instead, many are being purchased by institutional investors and converted into single-family rentals.
Policy and Market Forces
Researchers and housing advocates argue that the current market dynamics are unlikely to correct themselves without intervention. The high cost of land, materials, and labor incentivizes developers to build high-margin luxury properties rather than more modest, affordable homes.
The report suggests that a combination of zoning reforms, financial incentives, and inclusionary housing practices are necessary to encourage the development of a wider range of housing types. Easing restrictions on building denser housing like duplexes and triplexes in areas currently zoned for single-family homes is often cited as a crucial first step.
By the Numbers: A Shifting Market
- 59% of homes built since 2010 have four or more bedrooms.
- 33% of homes built in the 1980s had four or more bedrooms.
- 55% of occupants in the newest rental stock are moderate- to high-income.
- Less than 4% of new owner-occupied units were denser 'missing middle' housing.
Public investment in infrastructure and affordable housing projects is also seen as essential to supplement what the private market is failing to provide. Without these measures, the dream of homeownership may move further out of reach for millions of Americans, particularly in the nation's fastest-growing cities.
Signs of a Potential Shift?
While the long-term trend has been toward larger homes, some recent data suggests a possible change on the horizon. A separate analysis of nationwide building permits shows a decrease in the median size of new builds. In 2022, the median size was 2,128 square feet, which fell to 1,965 square feet in 2024.
This could indicate that builders are beginning to respond to affordability pressures by constructing slightly smaller, more attainable homes. However, it remains to be seen if this trend will be significant enough to counteract the dominant pattern of the last decade.
Joel Berner, a senior economist at Realtor.com, noted that the concept of a starter home is evolving. "I don’t believe that starter homes are going by the wayside, but more of them are being used as single-family rentals," he explained. This suggests that many families may rent for longer periods before they are able to purchase a home, often needing a larger property by the time they can finally buy.
As cities like Dallas, Phoenix, and Atlanta continue to grow, the challenge will be to ensure that new development creates inclusive communities with housing options for residents across all income levels, not just those at the very top.
