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  • Phone: 970-328-8640
    Fax: 970-328-8679

    P.O. Box 449
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    Eagle, Colorado 81631  

Comparable Sales Data

Below are 2019 Comparable Sales Data reports by property type. To research commercial sales information, select the “commercial” link below. Once you open the appropriate report, you can save and manipulate the data as needed.

The information is sorted by “superneighborhood” (economic neighborhood) and then by neighborhood (subdivision). The listed sales are qualified valid sales from July 1, 2016 through June 30, 2018.

If you do not find sales within your specific neighborhood, contact the Eagle County Assessor’s Office at 970-328-8640 for assistance.

Commercial Condominium Mobile Homes  
Single Family Homes   Townhomes Vacant Land

Effective Square Footage

The premise of this methodology is the way non-living area footages are calculated and valued within the mass appraisal model.

The mass appraisal computer system is designed to make specific mathematical calculations to the non-living area square footages, rather than make separate valuation calculations of these subareas. This method provides more uniform comparison of properties for valuation purposes, since all properties are adjusted for their individual characteristics uniformly, which leads to the equitable distribution of value among the parcels throughout Eagle County.

The determination of building size is initially done from building plans. The dimensions of each building are then confirmed by physical review. The first step in this process is the calculation of the main living area and sub-areas, i.e., garages, porches, decks and/or outbuildings.

The actual square footage for each area is adjusted by various weights to derive a value. A simple example of this adjustment would be a full unfinished basement in a 1000 square foot home. Market data indicates that an unfinished basement will add approximately 20% to the value of a typical residential property. The property card would read as follows:






BAS - Base Area
1st Floor Above Ground 




 02 UBM - Unfinished Basement        




  Area Totals:   




In the above example, "BAS" is the main living area and is treated as 100 percent. "UBM" is the unfinished basement at 20.21 percent or 200.21 square feet of the actual basement size. The .21 rendered in the total effective column is part of the mathematical function in the computer system.

The sum of the effective area is then multiplied by the indicated value per square foot to establish final building value, i.e., 1200.21 X $165.24 = $198,320. (rounded)

Note: The effective square footage will be printed on all of the Notice of Value forms and viewed this way. 

Time Adjusted Sale Price

Adjustment of sales for time is required by statute pursuant to CRS 39-1-104 (11)(a) (I). This statute mandates the assessor's use of manuals and methodology published by the Division of Property Taxation. Refer to Volume 3 of the Assessors Reference Library, section 2, pages 2.24 through 2.42 for more specific information on the mechanics of time trending.

By definition a time adjustment is, "An adjustment for the difference (if any) between market conditions at the date of sale of a comparable property and the date of appraisal (June 30, 2018) which results in a time adjusted sale price (TASP)."

A TASP is defined as, "The price for which a property sold at some given time, adjusted for the effects of inflation or deflation between the date of sale and the date of appraisal." There are four methods of time trend analysis approved by the State of Colorado.  They include (1) sales ratio technique, (2) paired sales analysis, (3) property re-sale analysis and (4) multiple regression analysis.  Eagle County reviews each method before any application is made to properties.  In most cases, Eagle County relies on the multiple regression analysis along with the sales ratio analysis.  

All available qualified sales were analyzed within various economic regions, (Vail, Avon, Edwards, Eagle, etc), and by type, (vacant or improved, residential or commercial).  Each individual sale was then adjusted to the appraisal date of June 30, 2018.

For the 2019 reappraisal, 2 years of data spanning from July 1, 2016 was examined.  In some cases a spline trend was applied (i.e. we accounted for differing appreciating rates over time).