What should be the COD for older heterogeneous residential property?

The coefficient of dispersion (COD) is a statistical measure used to analyze the uniformity of assessments compared to actual market values. For older heterogeneous residential properties, a COD in the range of 5 to 15 is typically considered acceptable. This indicates a relatively low level of variability in assessment ratios among properties in this category, suggesting that properties are being assessed fairly and consistently in relation to one another.

Older heterogeneous properties often vary significantly in design, condition, and amenities, making it important to maintain a COD that reflects appropriate assessment practices. A COD within this range helps ensure that the assessments are equitable, as it accounts for differences while still indicating that the assessments are grouped closely around the mean.

Choosing a range outside of 5 to 15 would suggest a higher variability, which may indicate issues in how properties are being valued and assessed, leading to potential inequities among property owners. Thus, for older heterogeneous residential property, the most appropriate COD is between 5 and 15.