Why Manhattan Market Numbers Disagree Without Either Source Being Wrong

A market statistic is a defined sample

Every market number begins with a universe: listings visible to one portal, transactions in a rolling period, public records recorded by a cutoff date, or a modeled set of homes. Geography, property types, and update timing then narrow that universe. Two credible sources can therefore answer similar-sounding questions with different figures.

The supplied Zillow Manhattan URL rendered New York County data. Redfin labeled its page Manhattan. StreetEasy reported Manhattan listing and contract measures. Realtor.com presented New York County charts and a Manhattan city row. Those labels are close enough for broad context but not close enough to erase.

Dates create another difference

Redfin's headline median sale price covered the three months ending August 2026. Zillow's sale-price and sale-to-list figures were dated July 31 while its inventory and value measures were dated August 31. Realtor.com said its charts reflected data through August and separately showed a September sale-to-list figure. A comparison that drops those dates can make a lag look like a disagreement.

Definitions matter more than decimals

Median asking price, median sold price, typical modeled value, average rent, median asking rent, days on market, and days to pending are not alternate spellings of the same metric. The definition determines what a reader can responsibly conclude.

• A median describes the middle observation, not the average property.
• A modeled index is designed to track a market even when the mix of available homes changes.
• A listing count depends on provider coverage and deduplication rules.
• A sale-to-list ratio depends on which list price is used as the reference.

How to reconcile sources

First, write the metric exactly as the provider does. Second, attach the date and geography. Third, identify whether it is asking, pending, contracted, closed, recorded, or modeled. Fourth, use the number only for the decision it can support.

For an individual home, broad numbers should open the analysis rather than end it. Same-building and same-property-type evidence, current competition, condition, and transaction mechanics remain the decisive layer.

A reconciliation worksheet that stays honest

A simple worksheet can prevent most statistical confusion. Give each row a provider, geography, property universe, metric label, observation period, publication date, value, and stated method. A New York County value should not silently become a Manhattan neighborhood value. A three-month closed-sale median should not be placed in the same column as a single-month asking median without a period label.

Next, add a decision-use column. Asking inventory can help a seller identify current competition. Closed-sale data can help frame a comparable set. A modeled value series can help describe broad direction. Contract counts can help discuss activity. Rental concessions can help a renter compare gross and effective cost. This step turns a pile of numbers into evidence with a job.

Finally, add a limits column. Common limits include all-home-type coverage, unknown mix changes, portal-specific listing coverage, lag between contract and closing, and lack of property condition. A statistic does not become weak because it has limits. It becomes more reliable when those limits remain attached.

• Do not average unlike metrics.
• Do not backfill a missing neighborhood figure with a borough figure.
• Do not interpret a portal URL slug as proof of the rendered geography.
• Do not treat a newer publication date as a newer observation period without checking both.

Research note: This article uses broad Manhattan and New York County context. It does not price a specific property or establish a neighborhood, co-op, condo, or townhouse result.

Sources for this explanation: Zillow, New York County Housing Market · Redfin, Manhattan Housing Market · Realtor.com Research, New York County Housing Market · StreetEasy, August 2026 NYC Housing Market Report. Provider dates, geography, definitions, and limitations appear in the dated report and methodology.

By Tracie Golding, Licensed Associate Real Estate Broker at Compass. Read Tracie’s profile.