Why Zillow, Redfin and Realtor.com Show Different Seneca Prices
Why do Zillow, Redfin and Realtor.com show different Seneca prices and market measures?
Short answer: Zillow, Redfin and Realtor.com can all be useful for Seneca context, but their figures are not interchangeable because they use different measures, property populations, windows and update schedules.
In late September 2026, Zillow displayed a $308,416 typical Seneca home value, Redfin displayed a $256,830 median sale price for the three months ending August, and Realtor.com displayed a $458,995 median listing price. Those are not three versions of the same number.
Zillow's headline is a modeled index
Zillow identifies its headline as the Zillow Home Value Index, a modeled measure of typical home values. The same page separately reported a $337,167 median sale price for July, 261 homes for sale in August and 47 median days to pending.
Redfin emphasizes completed sales
Redfin's trend panel reported a $256,830 median sale price, 43 August sales and 59 median days on market, based on Redfin calculations of MLS and/or public-record data. Its three-month headline and monthly chart should remain attached to Redfin's stated window.
Realtor.com includes current asking-market context
Realtor.com reported a $458,995 median listing price, $357,500 median sold price, 473 active listings and 78 median days on market in its September overview, with historical charts through August.
How to reconcile the pages
Label every figure by provider, geography, date, property population and metric type. Never average modeled values, asking prices and completed-sale medians together. For a property decision, portal context should lead to source-verified comparable sales rather than replace them.
Read the full portal methods table.
Use the portal metric that matches the question
| If the question is | Use this kind of figure | Keep this limitation visible |
|---|---|---|
| What is a modeled broad value trend? | Zillow's ZHVI | It is a modeled index, not an appraisal or a closed-sale median. |
| What did recent reported sales look like? | A provider's completed-sale median with its stated window | Windows and data coverage differ by provider. |
| What are sellers asking today? | A listing-price median | It describes active offerings, not completed transactions. |
For a Lake Keowee property, the next step is not averaging portal values. It is checking verified comparable sales and the specific water, dock, lot and community facts for the property.
Questions buyers and sellers may ask
Which Seneca portal number is the correct one?
Each can be correct for its own definition. The correct choice depends on whether you need a modeled index, an active-listing measure or a completed-sale measure.
Can a portal estimate replace a comparable-sales review?
No. A portal measure is broad context. It does not verify the attributes that drive a specific Lake Keowee or Seneca property decision.