Identify the metric before reading the change
Check the provider, geography, property segment, adjustment and date. Zillow defines ZHVI as a modeled typical value for homes in the 35th to 65th percentile. That population differs from homes that happened to sell during one month.
Use direction for context, not a property answer
A positive or negative city change can prompt questions about current listings and comparable sales. It does not show how a specific street, property type, condition or renovation moved. Different cities also contain different housing stocks.
Do not substitute the index for affordability
Affordability depends on the actual price, financing, taxes, insurance, association charges, maintenance and the buyer’s finances. An index change does not calculate those costs or predict a future resale price.
Move to property-level evidence
For a purchase or sale, review current competing listings, relevant recent sales, verified property facts and current financing or settlement information. Record where each number came from and its date.
Retain the limitations when sharing a headline
Name the provider, geography, housing segment and period. Say “modeled typical value” rather than “home prices” when that is the underlying measure. Avoid turning a city change into a neighborhood, parcel or forecast claim.
Sources & further reading
- Zillow Housing Data and metric definitions checked 2026-09-29
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