Preliminary Assessed Valuations:
Preliminary assessed valuations available by August 25 of each year. The valuations are certified by the county assessor to the State (Section 39-5-128 C.R.S.). The various state and county entities then calculate mill levies based on the preliminary valuations.
Final Assessed Valuations:
If changes occur to the assessed valuations between August 25 and December 10, county assessors must re-certify final assessed valuations to the state and various taxing entities. This will allow such entities to recalibrate mill levies, if necessary (Section 39-1-111, C.R.S.).
See the Assessor’s Reference Library for a general discussion of the role of assessors and the assessment certification process in Colorado.