Zillow's September rental-demand index rises 19.2% from a year earlier
Zillow’s Oct. 15 report shows stronger rental-listing engagement in September. Its demand index measures attention, not signed leases or a count of households.
By Aida Yousif · 3 min read
Zillow’s rental-demand index rose 19.2% from a year earlier in September, according to its report released Oct. 15. The Zillow Observed Renter Demand Index, or ZORDI, measures observed engagement with rental listings. It is not a count of signed leases or a finding that the number of renter households increased 19.2%. Source.
What the demand index measures
Zillow describes ZORDI as a smoothed proxy for rental-market demand based on engagement on its listings. That makes it a measure of attention and interest within the observed listing environment. A person engaging with listings has not necessarily moved, applied or completed a lease.
The distinction is particularly important beside rent statistics. An index of listing engagement and an asking-rent estimate answer different questions. A stronger demand index does not, by itself, tell a renter the price of an available apartment or how many competing applications it has received.
Single-family and multifamily readings differ
September’s single-family rental-demand index was up 21.6% from a year earlier, while the multifamily reading rose 10.1%. Those are changes in two index series, not the percentage of each property type rented during the month.
Zillow’s national typical asking rent was $1,932 a month, up 2.7% from a year earlier and 0.1% from August. Its single-family asking-rent estimate was $2,266, while the multifamily estimate was $1,762. These advertised-rent measures are not the rent paid by every household or the price available to every prospective tenant.
Concessions remain part of the picture
The report says 39.6% of rental listings on Zillow offered concessions in September, up 2.2 percentage points from a year earlier. A concession can affect the economics of a particular listing, but the national share does not identify the value or conditions of an offer in a specific lease.
Zillow also reports substantial differences across metropolitan areas. The demand index increased sharply in some markets and declined in others. A national increase should not erase those differences or be treated as a forecast for every neighborhood.
How Zillow explains the movement
Zillow links stronger rental interest to the cost of buying and elevated borrowing costs. That is the company’s interpretation. The index alone does not prove that every added listing interaction came from a would-be buyer, or quantify the role of mortgage rates separately from other factors.
This report is distinct from Realtor.com’s September asking-rent coverage published separately by mortgage.news. Different providers, populations and methodologies should not be blended into a single series. A demand-index change cannot be substituted for either provider’s rent-price change.
Takeaway for renters and homebuyers
The new release records higher observed rental-listing engagement and continued national asking-rent growth in September. For an individual housing comparison, the relevant evidence remains the actual listing, lease terms and dated financing information. This report does not establish guaranteed savings from renting or buying.
Zillow rental-demand index
| Series | Year-over-year change |
|---|---|
| All rentals | +19.2% |
| Single-family | +21.6% |
| Multifamily | +10.1% |
Sources
Zillow September Rent Report, Oct. 15, 2026.
Cover: Zillow 2024 logo, a public-domain text logo; trademark rights retained. Rendered without design changes. Provenance and rights.
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Transcript (on-screen text; original instrumental music, no narration): mortgage.news; Rental demand; Zillow, September 2026; +19.2%; Zillow Observed Renter Demand Index, year over year; Index measures listing engagement, not signed leases.; Single-family; +21.6%; Multifamily; +10.1%; Typical rent; $1,932 a month; +2.7% year over year; Demand index +19.2% | Rent +2.7%; Source: Zillow September 2026 Rent Report, Oct. 15, 2026