Sales Ratio Study
Appraised-value-to-sale-price ratios from real arms-length sales, evaluated against the IAAO Standard on Ratio Studies. Measures assessment level (are we near 100%?) and uniformity (are properties treated consistently?). The ratio uses the property's 100% appraised value (not the 60% assessed value) over the sale price, the correct basis for an IAAO ratio study. The sale window is the trailing three years ending in the selected tax year.
Why this differs from the Assessor Report Card. This live study uses each parcel's
current appraised value against sales from the trailing three years — it is
not time-matched. The
Report Card and the offline ratio-study dataset instead compare every
sale to the appraised value in that sale's own year (a true time-matched ratio). Because of
that difference — current value vs. value-in-sale-year — the median ratio, COD, and PRD here
will not match the report-card figures, especially after a recent reappraisal or in a fast-moving market.
For historical, assessor-attributable uniformity, use the time-matched figures on the Report Card.