The U.S. multifamily sector has delivered a surprise few investors foresaw: an extraordinary absorption of new apartment supply, undercutting dire warnings of oversupply and muted demand. Over 725,000 units were absorbed by the end of the second quarter—a scale “nobody predicted,” as Walker & Dunlop CEO Willy Walker put it in a recent company podcast.
“Nobody. And the only reason you have that is because single-family has become so unaffordable that people are sitting there saying, ‘I’m going to go rent that apartment building, right?’”
Consensus projections based on a record pipeline of deliveries and macroeconomic uncertainty anticipated rising vacancy rates and pressure on rent growth. Instead, the multifamily sector delivered one of its strongest absorption performances on record. Detailed data show that annualized absorption averaged close to 667,000 units in 2024—more than double the pace from 2015 to 2019 — and, according to CoStar, nearly 552,300 net units by year-end, up from 327,700 at the end of 2023.
“This huge overhang of supply on the multifamily market has been absorbed much quicker than people had expected,” Walker explained, directly attributing the shift to affordability pressures.
This dynamic has not played out evenly across metros. While the national multifamily occupancy rate quickly rebounded to near its average at 96 percent, some markets lagged, especially Austin, which with its just 86 percent occupancy. But still, an investment opportunity might open there.
As Walker put it, the "national average is at 96%... So when do you invest in Austin? Austin multi? Yes, when it gets to 90%, right? When it gets to 94 because one thing that’s sure to happen is that cap rate is going to come down as we get from 86 to 90 and 90 to 94."
Market factors such as job growth are exerting an outsized influence on performance.
“There’s no doubt in my mind that I would rather own multi 10 years from now in Austin, Texas than Cleveland, Ohio, for that reason—for job growth, it’s where the jobs are now. Cleveland, over the last two years, has been a much better market to own multi in than Austin. [That's] true of the Upper Midwest, generally… but the question would be, are you buying for this year? Are you buying for seven years from now or 10 years from now?”.
The unprecedented absorption surprised even the most seasoned analysts and highlighted critical shifts in American housing behavior. Many earlier forecasts failed to factor in the “lock-in effect,” as millions of single-family owners with ultra-low mortgage rates opted to stay put, freezing inventory and further diminishing accessibility for would-be homebuyers.
With single-family supply constrained and new construction lagging, “Jay Parsons… will show you a chart… just look at where we are from a supply standpoint, the number of shovels going into the ground, the delivery schedule, and where we’re going to be under supplied in two years,” Walker warned. Indeed, construction starts slowed sharply by late 2024, setting the stage for a period of limited supply and stronger rent growth in select markets.
Walker also noted that about 70% of recent household formation was captured by rental stock rather than ownership.
“We’ve got to be careful not to think that the American Dream is static…,” he admitted. “The dream was defined by home ownership, and it may well be that the dream needs to be inclusive of a rental population who could live in a better neighborhood than they can by virtue of the unaffordability, or relative unaffordability, of home ownership.”
For investors, these lessons are already shaping strategy. The absorption boom—fueled by single-family unaffordability, sharply divergent regional performance and a construction pipeline that’s decelerating—demonstrates how rapidly rental demand can absorb excess even in the face of record deliveries. Looking ahead, markets are increasingly local and timing critical; cap rate compression, rent momentum and supply tightness will vary by metro and submarket.
Ultimately, the multifamily absorption surge provides a textbook case—one that not only upended the prevailing risk narrative but also sharpened the sector’s focus on fundamentals, local economic conditions and the timing of capital deployment. As Walker concluded, the opportunity is real, but so too is the need for discipline. The coming year will test just how well the sector has internalized the lessons of a uniquely volatile cycle.
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