What is time trending and why is it necessary?
Residential properties, by law, must be valued solely by the market approach, using comparable verified sales from the study period ending the June 30 prior to January of the reappraisal year. The assessor may go back in time in six month increments up to five years for their study period data. In Gunnison County, we use a 24-month minimum study period to eliminate seasonal differences that may affect the market in an 18-month period.

In reappraisals with low sales volume, 48-60 months of sales may be necessary to comply with audit requirements. These same statutes require the adjustment of sales prices within this study period to the end of the data period. Sales of residential homes taking place during the sales study period are analyzed to establish the residential time trend adjustments.

Since the law requires that sales prices be adjusted for time to the end of the study period on the June 30 appraisal date, it’s as if all homes that sold during the study period were sold on the June 30 end date and the time adjusted sales prices (TASP) reflect market conditions on that date.

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1. What does my county assessor do?
2. Why is property taxed in Colorado?
3. How is my property value determined?
4. Do all assessments or values change at the same rate?
5. How can my assessment or value change when I haven't done anything to my property?
6. What are the factors used in determining value?
7. What is a "sales study period?"
8. Why is the sales price adjusted for some sales?
9. What is time trending and why is it necessary?
10. What is an "arm's length transaction"?
11. If my property value has increased, will my property taxes go up?
12. How do I estimate taxes on a new house?
13. How do I estimate taxes on vacant land?
14. Why is vacant land and commercial assessed at 29%, and residential at 7.96%?
15. Who sets the tax rate or mill levy?
16. How does the TABOR Amendment affect my valuation?
17. How are foreclosure sales considered?
18. How can I verify the value on my property?
19. If I bought my house within the last two years, shouldn’t the value be the same as what I paid for it?
20. How is actual square footage determined?
21. My house wasn’t complete on January 1. How was it valued?
22. My property doesn't compare to the expensive home down the street that just sold. Are you valuing my property based on that property?
23. My Notice of Valuation shows land value and improvement value, but I didn’t make any improvements. Why did my value increase when I have not done anything to improve my property?
24. How can I determine if the appraisal of my home is accurate?
25. If I disagree with the Assessor’s valuation of my property, what should I do?
26. What happens after I appeal?
27. Is the month of May the only time I can appeal a valuation?
28. What's the taxpayers responsibility in filing an appeal?
29. Who pays the taxes due on property I sold or purchased?
30. How do I change my address?
31. How do I change my name or add a name, or take a name off the ownership of my property?
32. What is the difference between a quitclaim deed and a warranty deed?
33. How do I change title on my property?
34. How can I correct the acreage on my property description?