Using Time Trending for 2013/2014 Property Valuation

What Is Time Trending and How Is It Used?

By Colorado law, residential properties must be valued solely by the market approach using verified sales of similar homes. The study period of July 1, 2010 to June 30, 2012 was used to determine values for the 2013 reappraisal. The law also requires that all sales prices within the study period are time adjusted to reflect the actual market conditions on the June 30, 2012 appraisal date.

Calculating the Time Trend Adjusted Sales Price
Look up the Time Trend Adjustment for the specific Market Area and property type, month and year in which the property was sold using the 2013 Residential Time Trend information. Use this formula to calculate the adjusted price: original sales price X time trend adjustment = adjusted sales price.

time trend adjustment formula

Example
Take a home sold in Market Area 102 in February of 2011 for $400,000. The files show the Time Trend Adjustment factor is 0.9856.

time trend adjustment 2013

Using the formula above:

time trend adjustment formulla

The adjusted sales price is $394,240.

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