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Ohio Housing Data Methodology

How every metric on the data page is defined, sourced, and calculated.

Every metric on the Ohio Housing Market Data page comes from a primary data provider — Zillow, Realtor.com, or the U.S. Census Bureau. Definitions below are sourced directly from each provider, followed by a plain-English explanation of what the number actually tells you.

Zillow zillow.com/research/data →
Home Value
Monthly · Single-Family · Mid-Tier · Smoothed & Seasonally Adjusted

Zillow Home Value Index (ZHVI): a smoothed, seasonally adjusted measure of the typical home value across a given region and housing type. It reflects the full distribution of home values — not just those that sold — and is reported for the middle tier of the market (33rd–67th percentile).

In plain terms: What a mid-range single-family home in this area is worth right now, based on Zillow's estimate of the entire housing stock — not just homes that happened to sell that month.
Home Value YOY %
Monthly · Derived from ZHVI History

Year-over-year percent change in ZHVI, calculated by comparing the current month's value to the same month 12 months prior.

In plain terms: How much home values have gone up or down compared to exactly one year ago.
Realtor.com realtor.com/research/data →
Active Listings
Monthly · Count

Realtor.com defines active listings as properties listed for sale that are not yet under contract as of month-end. This count reflects available supply in the market at that point in time.

In plain terms: How many homes are sitting on the market available to buy right now.
Active Listings YOY %
Monthly · Year-over-Year Change

Year-over-year percent change in the active listing count compared to the same month in the prior year.

In plain terms: Whether there are more or fewer homes for sale than this time last year.
Pending Sales
Monthly · Count

Realtor.com defines pending listings as homes with an accepted offer that have not yet closed as of month-end. Pending sales lead closed sales by approximately 30–60 days.

In plain terms: Homes under contract — the best leading indicator of where closed sales are heading in the next 30–60 days.
Pending Sales YOY %
Monthly · Year-over-Year Change

Year-over-year percent change in pending sales count compared to the same month in the prior year.

In plain terms: Whether buyer demand is stronger or weaker than it was a year ago.
Days on Market
Monthly · Median Days

Realtor.com defines median days on market as the median number of days from a listing's active date to the date it went under contract, for all homes that went pending that month.

In plain terms: How fast homes are selling — lower means a hotter market, higher means buyers have more time.
Days on Market YOY %
Monthly · Year-over-Year Change

Year-over-year percent change in median days on market compared to the same month in the prior year.

In plain terms: Whether homes are selling faster or slower than they were a year ago.
Price Cut %
Monthly · Share of Active Listings

Realtor.com defines price reduced listings as the share of active listings that have received at least one price reduction from their original list price as of month-end.

In plain terms: How many sellers have had to drop their asking price — rising means sellers are losing pricing power.
Price Cut % YOY
Monthly · Year-over-Year Change

Year-over-year change in the share of active listings with a price reduction, compared to the same month in the prior year.

In plain terms: Whether sellers are cutting prices more or less than they were a year ago.
U.S. Census Bureau — ACS data.census.gov →
Annual Property Tax
Annual · 5-Year Estimate · Median

U.S. Census Bureau American Community Survey (ACS) 5-year estimates: median annual real estate taxes paid by owner-occupied housing units. The 5-year estimate pools responses over a 60-month period to produce reliable county-level data.

In plain terms: The typical property tax bill for a homeowner in this area — updated once a year when the Census releases new ACS estimates.
Property Tax YOY %
Annual · Year-over-Year Change

Year-over-year percent change in median annual property tax from one ACS 5-year release to the next.

In plain terms: How much the typical tax bill changed — reflecting local reassessments and levy changes.
Effective Tax Rate
Annual · Derived: ACS ÷ Zillow ZHVI

Median annual property tax (ACS 5-year estimate) divided by the Zillow Home Value Index for that county, expressed as a percentage. This is a derived metric — not published directly by either source.

In plain terms: The actual tax burden as a share of home value — lets you compare tax load across counties regardless of price level.
Tax Rate YOY %
Annual · Year-over-Year Change

Year-over-year percent change in the effective tax rate (ACS median tax ÷ ZHVI) compared to the prior annual period.

In plain terms: Whether the tax burden relative to home value went up or down compared to last year.
PropStream propstream.com →
Tax Delinquent
Monthly · Count · PropStream

PropStream defines tax delinquent properties as parcels with unpaid property taxes past their due date as recorded in county tax records. Data is aggregated at the county level from PropStream's nationwide property database.

In plain terms: The number of properties in a county where the owner has fallen behind on property taxes — a leading indicator of financial stress and potential future distress inventory.
Tax Delinquent %
Monthly · Derived: Tax Delinquent ÷ Total Properties

Tax delinquent property count divided by total property count for that county, as reported by PropStream, expressed as a percentage. Both figures come from PropStream's property database for the same reporting month.

In plain terms: The share of all properties in the county with delinquent taxes — normalizes the count so you can compare across counties of different sizes.