Union County, TN — ARV estimates & comps

ARVCast covers the towns and subdivisions of Union County, TN: instant after-repair values, arms-length comps, and parcel-level property data. Rural parcels outside the platted areas are added on first request.

How accurate is ARVCast in Union County?

11.1%
Median error (MdAPE)
71.8%
Within ±20% of sale price
177
Sales backtested

Backtest of 2026-08-11 against held-out arms-length sales.

Run an ARV lookup in Union County

Enter an address to get an instant after-repair value with comps.

Covered areas in Union County

Maynardville

ZIP codes

37779, 37807, 37866

Frequently asked questions

Does ARVCast cover Union County, TN?
Yes — the towns and subdivisions across Union County, TN are covered. Rural parcels outside those areas are added when first requested.
How accurate are ARV estimates in Union County?
In the latest backtest (2026-08-11), the median absolute error was 11.1% across 177 held-out arms-length sales, with 71.8% of estimates within ±20% of the actual sale price.
Which ZIP codes does this include?
37779, 37807, 37866.
Can I get this data via API?
Yes — the same ARV, comps, and parcel data is available through the ARVCast API on RapidAPI. See the API docs.
Also covered:Shelby County, TNFayette County, TNTipton County, TNHaywood County, TNMadison County, TNGibson County, TNHenderson County, TNWeakley County, TNSumner County, TNWilson County, TNMaury County, TNDavidson County, TNRutherford County, TNRobertson County, TNCheatham County, TNDickson County, TNMarshall County, TNRhea County, TNBedford County, TNBlount County, TNWhite County, TNCoffee County, TNRoane County, TNAnderson County, TNBradley County, TNPutnam County, TNLincoln County, TNLoudon County, TNJefferson County, TNHamblen County, TNBledsoe County, TNWashington County, TNMoore County, TNDeKalb County, TNFranklin County, TNClaiborne County, TNWarren County, TNSevier County, TNTrousdale County, TNGiles County, TNCumberland County, TNMacon County, TNSullivan County, TNCannon County, TNCarter County, TNHawkins County, TNMcMinn County, TNOverton County, TNMonroe County, TNSmith County, TNGreene County, TNCampbell County, TNLewis County, TN

Need this programmatically? ARVCast API docs.