The County Courthouse buildings (1325 Pearl Street, Boulder), including the Annex (2045 13th Street), are closed until further notice. Visit boulderodm.gov for details.

Property valuation appeals can be submitted in-person in Longmont (515 Coffman St) and Lafayette (1755 S Public Road) or by email.

2023 Time Trending

Using Time Trending for 2023/2024 Property Valuation

What Is Time Trending and How Is It Used?

2023/2024 Comparable Sales

Time Trend Adjustments

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, 2020 to June 30, 2022 was used to determine values for the 2023 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, 2022 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 2023 Residential Time Trend information. Use this formula to calculate the adjusted price: original sales price X time trend adjustment = adjusted sales price.

Original
Sales
Price X Time
Trend
Adjustment = Adjusted
Sales
Price

Example
Take a home sold in Market Area 102 in February of 2021 for $600,000. The files show the Time Trend Adjustment factor is 1.2794.

time trend adjustment table 2023

Using the formula above:

$600,000 X 1.2794 = $767,640

The adjusted sales price is $767,640.