Stratified Sales-Ratio Study IAAO

The assessor's statutory core report. Every arms-length sale in scope is compared against the parcel's current appraised value, with each sale price time-adjusted to today using the repeat-sales price index. The result is the level of assessment (median ratio) and the IAAO uniformity metrics — COD, PRD, and PRB — overall and by stratum, so you can see where uniformity breaks down.