The Board of Assessment Appeals, arbitration, or district court as next steps

Bottom line first. You protested to the assessor, then to the county board, and you lost in whole or in part. You are not out of options, but the clock is short. As the statute text we checked reads, you must start an appeal or ask for arbitration no later than thirty days after the date the denial was mailed (C.R.S. 39-8-108(1)). Check your denial letter and your county assessor for the current year, because deadlines have changed in recent years.

Where you are in the ladder

The county board of equalization is the county commissioners sitting as a panel that hears property value disagreements. At its hearing the assessor must bring information that supports the county's value, and the board looks at both sides' exhibits with "no presumption in favor of any pending valuation" (C.R.S. 39-8-107(1)). That means neither your number nor the assessor's number starts out as the favorite. When the board denies your petition in whole or in part, its written notice must tell you about the three paths below (C.R.S. 39-8-107(1)).

The three paths

The statute lists them in one sentence: you may appeal to the board of assessment appeals, appeal to the district court of the county where the property sits, or submit the case to arbitration (C.R.S. 39-8-108(1)). Pick one. Here is how they differ.

• Board of Assessment Appeals (BAA). A state-level board that hears property value appeals. A request for a BAA hearing must come with a nonrefundable filing fee, which means you do not get it back even if you win (C.R.S. 39-8-108(1)). The fee amount is set in another section, so look it up on the BAA's own forms. Your request is stamped with the date received and is presumed on time unless the board shows otherwise (C.R.S. 39-8-108(1)).
• District court. The state trial court for your county. The appeal is a trial de novo, a phrase meaning the judge hears the case fresh instead of just reviewing what the county board did (C.R.S. 39-8-108(1)).
• Arbitration. A hearing before one neutral person, called an arbitrator, who decides the dispute instead of a board or judge (C.R.S. 39-8-108.5).

Why the BAA hearing matters so much

The county board's denial notice must warn you that a BAA hearing "shall be the last hearing at which testimony, exhibits, or any other type of evidence may be introduced by either party" (C.R.S. 39-8-107(1)). If you later go to the court of appeals, the judges use the record from the BAA hearing, and no new evidence (C.R.S. 39-8-107(1)). So bring everything to the BAA hearing: comparable sales, photos, repair estimates, the works. If the BAA rules against you, you may ask the court of appeals for judicial review (C.R.S. 39-8-108(2)).

Rules that apply in the BAA and in court

• The value may not be adjusted to more than five percent above the value the county board set (C.R.S. 39-8-108(5)(a.5)). The statute points to a narrow exception, so this is a ceiling on risk, not a promise.
• The assessor's value of similar property similarly situated is credible evidence (C.R.S. 39-8-108(5)(b)). That works both ways: a neighbor's lower value can help you.
• On request, the other side must give you its supporting data two working days before the hearing, and your request must come with data supporting your value (C.R.S. 39-8-108(5)(d)).
• Again, there is no presumption in favor of any pending valuation (C.R.S. 39-8-108(6)).

How arbitration works

Arbitration is the quick, informal option. The steps in the text:

1. Within thirty days of the county board's decision, tell the board you intend to pursue arbitration (C.R.S. 39-8-108.5(2)(a)).
2. You and the county board choose an arbitrator from the county's list within forty-five days of the decision (or within thirty days from when the list is made available that year, whichever is later). If you cannot agree, the district court picks one (C.R.S. 39-8-108.5(2)(a)).
3. The county board must take part and accept the arbitrator chosen (C.R.S. 39-8-108.5(2)(b)).
4. The hearing is held within sixty days from the date the arbitrator was selected, at a time set with the consent of both sides (C.R.S. 39-8-108.5(3)(a)).
5. Procedure is informal and strict rules of evidence are not applied unless the arbitrator decides justice requires them (C.R.S. 39-8-108.5(3)(b)). You bring information supporting your value; the assessor brings information supporting theirs (C.R.S. 39-8-108.5(3)(b.5)).
6. The arbitrator delivers a written, signed decision within ten days of the hearing (C.R.S. 39-8-108.5(3)(f), (g)).

Two big points. First, the decision is "final and not subject to review" (C.R.S. 39-8-108.5(3)(g)), so there is no second try. Second, for residential property, the arbitrator's expenses and fees "shall not exceed one hundred fifty dollars per case" (C.R.S. 39-8-108.5(5)(a)), and the decision says who pays them (C.R.S. 39-8-108.5(5)(b)). Arbitrators must be on a county list and cannot be someone who represents taxpayers in protests or abatements during that tax year (C.R.S. 39-8-108.5(1)(c)).

Choosing a path

Ask three questions. Do I want a second chance if I lose? Only the BAA and court routes leave a door open; arbitration does not. Do I want a quick, low-cost process? Arbitration has a capped fee and a short timeline. Is my evidence ready now? If it is not, remember that the BAA hearing is the last place to add evidence.

Example with real numbers

The dates and rate here are made up for the arithmetic and are not the current rate. Priya's county board mailed its denial on August 1 and left her value at $620,000. She believes it is worth $560,000.

1. Deadline. Thirty days after August 1 is August 31. That is her last day to file with the BAA or court, or to tell the board she wants arbitration (C.R.S. 39-8-108(1)).
2. Arbitrator pick date. Forty-five days after August 1 is September 15. If she and the board have not agreed, the district court chooses (C.R.S. 39-8-108.5(2)(a)).
3. Risk ceiling on appeal. $620,000 x 1.05 = $651,000. In a BAA or court appeal, her value generally cannot be set above that (C.R.S. 39-8-108(5)(a.5)).
4. Possible gain. $620,000 minus $560,000 = $60,000 less value. With a made-up total tax rate of 0.6% of actual value (ignoring the assessment-rate step), that is $60,000 x 0.006 = $360 a year.
5. Cost check. Arbitration fees for a home cannot exceed $150 (C.R.S. 39-8-108.5(5)(a)), so one year's $360 saving is more than that cap. A BAA filing fee is nonrefundable, so she looks up the fee amount and compares it to the gain.

This is general education, not legal or tax advice. Rules differ by case, so read your own denial notice and call the county assessor with questions.