"Not listings Chicago buyers and agents are concerned with." That was Zillow's explanation for why it refused to display nine home listings in Florida, Georgia, and California this spring. The refusal triggered a two-day blackout that pulled more than 60 percent of active Chicago-area listings off Zillow's own platform, Naperville included.
If you have spent any part of the last few months comparing Naperville homes across different websites and noticed the numbers do not line up, that dispute is part of the answer. But it is not the whole answer, and the second part matters more to your budget than the first.
A Fight Over Nine Listings, Far From Illinois
In May 2026, Midwest Real Estate Data, the multiple listing service that powers most Chicago-area real estate sites, cut off Zillow's access to roughly 43,000 active listings, close to its entire local inventory. The trigger was Zillow's Listing Access Standards, a policy that bars any home from appearing on Zillow if it was marketed privately before hitting the open market. MRED said enforcing that rule against listings entered through its system violated Zillow's license agreement. Zillow refused to back down, and MRED shut off the feed at midnight on May 21.
Zillow's response was to sue, alleging that MRED and the brokerage Compass coordinated to pressure Zillow into carrying private listings nationwide, a claim MRED and Compass dispute. A federal judge in Chicago, John Tharp Jr., ordered the feed restored the very next day.
None of this changes what a Naperville home is worth. What it does change is how much confidence you should place in any single portal's snapshot of the market on any given day this year. If a listing feed can disappear and reappear inside a 48-hour window over a legal argument that has nothing to do with your street, then the number you saw last Tuesday and the number you see today may not be measuring the same market conditions, let alone the same inventory.
That is the smaller problem. The bigger one is baked into how these sites define their numbers in the first place.
Two Different Clocks
Pull up Naperville on Zillow and Redfin side by side and you will find two very different stories about how fast homes are moving.
Zillow's own citywide listings page for Naperville, in a snapshot taken in early August 2026, listed the average time to pending status at 17 days. A separate Zillow page, this one scoped just to the 60567 ZIP code and last updated April 30, 2026, showed homes there going to pending in an average of 7 days. Redfin's numbers for the three months ending in May 2026 tell a slower story altogether: a median sale price of $595,000, down slightly year over year, with homes taking a median of 43 days to sell, and even Redfin's own "hot homes" category, the fastest-moving tier, still averaging 30 days to pending.
None of these figures are wrong. They are measuring different things, at different scales, in different windows.
| Source | Metric | Window | Naperville reading |
|---|---|---|---|
| Zillow, citywide | Average days to pending | Early August 2026 | 17 days |
| Zillow, ZIP 60567 only | Days to pending | As of April 30, 2026 | 7 days |
| Redfin, citywide | Median days on market | 3 months ending May 2026 | 43 days |
| Redfin, citywide | Hot homes, days to pending | 3 months ending May 2026 | 30 days |
"Days to pending" measures the gap between a home hitting the market and it going under contract, often calculated from the first listing date to the moment a status flips. "Days on market" as Redfin tracks it can include a longer window, relistings, and the full run of a listing's life before closing. A home that fields an accepted offer in nine days but takes another five weeks to actually close inspection contingencies and financing will show up very differently depending on which clock you're reading.
What the Speed Numbers Are Actually Good For
None of this means the portals are useless. It means a single day-count from a single site is the wrong tool for the question most buyers and sellers are actually asking, which is how much competition to expect on a specific home.
A better read comes from pairing two things: the sale-to-list ratio and the pattern of price cuts. Redfin's own data for Naperville shows the average home selling for about 2 percent above list price, with the fastest-moving homes hitting 6 percent over asking. That tells you more about real buyer competition than any days-on-market figure, because it reflects what actually happened at the negotiating table rather than how a website's algorithm defines a status change.
If you are shaping an offer strategy or deciding how aggressively to price a listing, that is the number worth building around, not whichever days-to-pending figure happens to load first. Our buyers and sellers guides walk through how we build a pricing and offer strategy around the metrics that actually predict outcomes, rather than the ones that make the best headline.
The Line No Portal Draws
Here is the number that changes your actual monthly cost, and it will not show up on any listing site no matter how current the data feed is: which county the home sits in.
Naperville straddles DuPage and Will counties, and the property tax rates on either side of that line are not close. According to Ownwell's most recent county-level analysis, the median effective property tax rate on the DuPage County side of Naperville runs about 2.05 percent, with annual bills across ZIP codes ranging from roughly $7,227 in 60563 to $9,936 in 60540. On the Will County side, Ownwell puts the median effective rate at 2.35 percent, nearly three-tenths of a point higher, with bills ranging from about $7,766 in 60540 up to $13,211 in 60565.
The detail that makes this genuinely tricky is that 60540 shows up on both lists. ZIP codes in Naperville do not respect the county boundary, which means two homes sharing the same five-digit ZIP can sit in entirely different tax jurisdictions with different school levies and different bills. A buyer comparing two listings at the same price, in what looks like the same part of town, could be looking at a tax gap of several thousand dollars a year based on which side of an invisible parcel line each house happens to sit on.
Run that gap through a mortgage calculator and it moves your monthly payment more than a typical rate-lock decision would. That is not a number Zillow's Zestimate or Redfin's Compete Score is built to surface. It comes from the county assessor's parcel record, and it is worth checking before you fall in love with a floor plan.
Before You Compare Two Listings at the Same Price
A few things worth confirming on any Naperville address before you treat two similarly priced homes as interchangeable:
- Which county the parcel sits in, DuPage or Will, since the ZIP code alone will not tell you
- The specific school district assignment for that address, since boundaries for Naperville's two main districts do not track the county line or ZIP codes cleanly
- Whether the home is served by the downtown BNSF Metra station or the Route 59 Union Pacific West stop, since walkable stations carry their own pricing premium separate from the county tax question
- The listing's actual contract history, not just its current days-to-pending count, which your agent can pull directly from the MLS rather than a portal's public-facing summary
A Couple of Questions We Hear
Is the Zillow-MRED dispute over now? The immediate feed cutoff was resolved by court order the day after it happened, but the underlying antitrust lawsuit moved into discovery shortly after and had not been publicly resolved as of the reporting available at the time of this writing. Treat any single portal's Chicago-area listing count as a snapshot rather than a permanent state of affairs until the larger case is settled.
Which number should I actually trust when I'm comparing homes? None of them in isolation. Sale-to-list ratio and recent closed comparables tell you more about real competition than a days-on-market or days-to-pending figure pulled from any one site. Our Naperville neighborhood page is a starting point, but the numbers that matter for your specific offer come from a direct MLS pull, not a portal's summary page.
Does the county line affect every Naperville home the same way? No. The gap is largest for buyers comparing homes near the DuPage-Will boundary, particularly around ZIP codes like 60540 that appear in both counties' data. A home firmly on one side or the other will have a more predictable bill, but you still need the parcel-level confirmation rather than an assumption based on ZIP code.
If you are weighing two Naperville addresses that look identical on paper and want the real numbers behind them, from tax jurisdiction to school assignment to what recent comparable sales actually closed at, request your free home valuation and we will walk through what the portals aren't showing you. Latitude Realty has been reading this market address by address, not headline by headline, and that is the read we bring to every Naperville conversation.
