Negative Rent Growth Is Forcing a Rethink of SFR Strategy in an Overbuilt Sun Belt

"As we entered the fourth quarter, even though the supply remained elevated, we started seeing that the demand was under pressure," Zelman said. Her team now expects some Sun Belt markets to "still be suffering with elevated absorption through '27," noting that every component of shelter in those metros is competing for the same household—single‑family for sale, single‑family for rent, multifamily and a meaningful number of vacant units.

In her words, "every other shelter in the Sun Belt is also oversupplied," and that is "weighing overall rent growth down for the nation."

For institutional SFR portfolios, that means the old assumption that single‑family rentals would be structurally insulated from multifamily oversupply is no longer holding in many high‑growth Sun Belt MSAs. Discounting and incentives from for‑sale builders, combined with aggressive concessions in new multifamily product, are compressing the pricing power that SFR operators once took for granted in renewal and new‑lease underwriting.

Renewal Strategies: From Maximizing Yield to Defending Occupancy

In an environment where SFR rent growth has turned negative on a national survey basis, renewal strategy becomes less about driving headline growth and more about preserving duration and occupancy in specific submarkets. Zelman's comment that "blended overall was one of the lowest numbers" in survey history implies that renewal increases are no longer offsetting weak or negative new‑lease trade‑outs in many portfolios.

Owners who built budgets around mid‑single‑digit renewal growth in the Sun Belt will likely find that approach misaligned with current conditions. With every alternative form of shelter in those markets competing on price—new single‑family with mortgage rate buydowns, multifamily with months of free rent and SFR peers adjusting expectations—the risk of push‑through renewal strategies is that they accelerate move‑outs and lengthen downtime.

The practical response is granular, not generic. Institutional operators will need to segment renewal strategies by micro‑location, product vintage and resident profile rather than push uniform increases across a Sun Belt footprint.

In submarkets showing the weakest absorption, defending occupancy through modest or even flat renewals may be the rational choice, particularly where turnover costs and downtime exceed the marginal gain from a higher rent ask.

Capex and The Timing Problem

The negative rent print also complicates capital planning for portfolios that had been banking on steady NOI growth to support ongoing capex programs. Zelman observed that the supply pressure is not a one‑year problem; in some Sun Belt markets, she expects excess inventory to persist "beyond '27" absent a re‑acceleration in absorption. That is a long horizon over which to commit to heavy upgrade programs if the rent premiums needed to justify those investments are at risk.

The instinct to spend through a downturn to differentiate product may still make sense in select locations, but the underwriting bar is higher. Where operators previously assumed that upgraded homes would capture both a rent premium and the benefit of rising market rents, they now must underwrite to thinner spreads in rent and a longer payback period.

In the most crowded submarkets, the more urgent capital decision may be defensive: ensuring basic habitability and curb appeal without over‑capitalizing assets that will struggle to support premium pricing until the broader supply picture improves.

Zelman also pointed to land and development costs as structural headwinds, noting that lot prices "never took a breath" and that impact fees alone can represent 15 percent of the average selling price in markets like San Francisco and about 5 percent in Houston.

While those figures relate primarily to builders, they indirectly affect SFR portfolios that rely on new supply for growth or that compete with new‑build communities offering aggressive incentives. Where replacement cost remains elevated, preserving existing assets' competitive position through targeted, efficient capex will matter more than large‑scale repositioning bets that assume a quick return to robust rent growth.

Mark‑to‑Market: Resetting the Rent-Growth Story

Perhaps the most consequential impact of the -1.1 percent print is on mark‑to‑market assumptions baked into institutional underwriting models. In the years leading up to this point, many institutional investors accepted the idea that Sun Belt SFR offered a structural rent‑growth advantage, fueled by migration, relative affordability and a perceived housing shortage narrative.

Zelman challenged that narrative directly.

"Is it fair to say that we don't have a housing supply issue, we have a housing affordability issue?" Walker asked. Zelman agreed, arguing that the real constraint is the price point, not the volume of units and pointing to elevated shares of young adults still living at home and stressed balance sheets among lower‑income households.

She cited record or near‑record delinquencies in student loans, credit cards and auto debt for many would‑be entry‑level buyers and emphasized that this cohort is not participating in the asset inflation seen in equities and crypto.

For institutional SFR underwriting, that affordability framing matters as much as the near‑term negative rent print. If the constraint in oversupplied Sun Belt markets is the ability of marginal tenants to pay, rather than the sheer number of people who need housing, then pro forma rent‑growth assumptions will need to reconcile with a consumer base under financial strain.

Zelman's team recently cut its 2026 national rent growth forecast from 3 percent to 1.9 percent, and she stressed that this remains "significantly still below trend line" because so many markets are still absorbing years of supply.

That kind of revision is difficult to ignore for any investor marking portfolios to market or bidding on new acquisitions. It suggests that underwriting that leans on a quick reversion to historic national averages—without distinguishing between over‑built and under‑built markets—is at risk of overstating future cash flows.

It also implies that some of the upside traditionally attributed to "loss to lease" in the Sun Belt may not materialize on the timetable that many models assume, especially where competition from discounted-for-sale housing and multifamily concessions remains intense.