Commercial property owners across Colorado are opening their 2025 valuation notices—and seeing sharp increases. In many counties, property assessments have jumped more than 20%, signaling significantly higher tax bills ahead.

What’s Behind the Spike?

 Market rebound, demand shifts, and mass appraisal methods have all contributed to steep assessment hikes. But the numbers don’t always tell the full story—and that’s where we come in.

At the same time, as area residents are aware, Colorado’s real estate market has slowed. Residential properties saw a median decrease of 1% in value. But commercial assessments tell a very different story:

Here’s a Look at Average Valuation Increases by Property Type:

Boulder County

  • Industrial: +20%
  • Retail: +15%
  • Office: +15%

Denver County

  • Industrial: +20%
  • Retail: +19%
  • Office: +5%

Understanding How Property Taxes Are Calculated

These assessments are part of a statewide process. Every two years, Colorado’s County Assessors are required by state law to revalue all residential and commercial properties. The 2025 values were mailed to owners in May 2024, and the Certified Tax Roll will be finalized in January 2025.

From there, each county’s Treasurer’s Office calculates your property taxes based on your updated valuation and the mill levies tied to your location. These levies are set by dozens of local taxing entities—like school districts, fire protection districts, water boards, and municipalities.

In Boulder County alone, there are 135 different taxing districts. The county acts as the central collector and distributor of taxes for all of them—and keeps only about a quarter of what is collected.

So even if the broader market is flat or declining, systemic increases in assessed value and overlapping mill levies can result in sharply higher tax bills for commercial properties.

What You Can Do: File an Appeal

At Catalyst Property Tax Consultants, we focus exclusively on Colorado commercial property appeals. With deep local expertise and a data-driven process, we consistently secure meaningful reductions for our clients:

  • 95% success rate
  • 32% average valuation reduction
  • Property owners often see first-year tax savings of $50,000 to $80,000 or more
  • No upfront cost—you only pay if we save you money

The Deadline is Approaching
The appeal window is short. If your 2025 valuation seems high, let’s review it together now. We’ll evaluate your case at no charge and tell you whether a protest is likely to succeed.