Data coverage
We publish this because refusing to sell where the data cannot support the argument is a feature, not an apology.
We ingested 0 parcels across 0 counties from the 2026 assessment rolls. Of those, 0 homes in 0 counties carry enough detail for a defensible comparison. We do not offer an analysis in the remaining 0.
What a defensible comparison needs
To argue that a home is assessed above comparable properties, four things have to be present on the same parcel record:
- An assessed market value. Ideally before exemptions, so homes with different exemption status can be compared like for like.
- Building square footage. Without it there is no way to express value per unit of house, and a large home cannot be compared with a small one.
- A cohort key — a subdivision name. It defines which homes count as comparable. A tax district is not a substitute: those average over a thousand parcels and describe a levy boundary rather than a neighbourhood.
- A residential property class, so warehouses and farms stay out of a housing comparison.
A county is published when at least 2,000 of its parcels carry all four, and they make up at least 25% of its roll. Both thresholds are judgement calls; both are deliberately strict.
Counties we analyse (0)
"Homes analysed" counts parcels that carry all four fields and sit in a subdivision with enough comparable homes to compute a median.
| County | Parcels | Homes analysed | Share | Roll vintage |
|---|
Counties we do not analyse (0)
Every exclusion below is a measured property of the county's own published roll, not a commercial decision.
Worth knowing
- Summit County publishes no building square footage at all, for any parcel. Value per square foot cannot be computed there, so no comparison is possible regardless of how good the rest of the record is.
- Davis County is Utah's second most populous and publishes no subdivision names, which removes the cohort key. Good values and square footage are not enough on their own.
- Box Elder County's roll is dated 2020 — five years stale. Even where fields are present, we will not compare a home against values that old.
- Coverage is re-measured on every ingest, so a county can appear here or move to the published list when its assessor changes what it publishes.
Source data is each county's published assessment roll, obtained through the Utah Geospatial Resource Center's Open SGID service. See the method for how the comparison itself is computed.