Keystone, Summit County, Colorado Property Taxes
Property Taxes in Keystone, Colorado
Median Keystone, Colorado effective property tax rate: 0.34%, significantly lower than the national median of 1.02%, and lower than the Colorado state median of 0.50%.
Median Keystone, Colorado home value: $841,200
Median annual Keystone, Colorado tax bill: $2,786, $386 higher than the national median property tax bill of $2,400.
How are property taxes in Summit calculated?
Property taxes in Keystone, Colorado are calculated based on the tax assessed value, which is often lower than the actual market value due to property tax exemptions such as the homestead or senior exemption.
Understanding Keystone's property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in Keystone, knowing local tax details benefits homeowners and investors.
Last Updated April 13, 2026
Keystone, Summit County, Colorado Property Tax Bill Calculator
$100,000
$1,500,000
$3,000,000
Median Effective Tax Rate
0.34%
Estimate Property Tax Bill
$2,860
$2,654
How Does the Keystone Property Tax Calculator Work?
Use this Keystone property tax calculator to estimate your annual property tax bill. Enter your property's assessed value and our calculator applies Keystone's median effective tax rate of 0.34% — based on actual property records in Summit County — to generate your estimate.
Enter your property's estimated assessed value — the figure the local appraisal district uses to calculate your bill, which reflects any exemptions you hold and is typically lower than your home's market value. Our calculator applies Keystone's median effective rate across all local levies, providing a more accurate estimate than applying a single county millage rate.
Your bill may vary by ZIP code within Keystone: rates range from 0.34% in 80435 to 0.34% in 80435, primarily due to differences in school district levies and local assessment districts.
For a more precise estimate, scroll down to explore ZIP code-level tax rate trends across Keystone.
About Keystone Property Taxes
About Property Taxes in Keystone, Summit, Colorado
Keystone's median effective property tax rate of 0.34% is lower than the Colorado state median of 0.50% and lower than the national median of 1.02%. This rate reflects the Summit County base levy combined with local school district levies and metro districts that vary by subdivision throughout the city.
Property tax rates are not uniform across Keystone. Homeowners in the 80435 ZIP code carry a median effective rate of 0.34%, while those in the same ZIP code pay 0.34%. This spread reflects how school district boundaries and local assessment districts are drawn across Summit County. Understanding which part of Keystone you live in can make a meaningful difference to your annual tax bill.
Keystone homeowners who believe their assessed value is too high can file a formal appeal with the local Tax Assessor before the June 1, 2026 deadline each year.
If your estimated bill above seems higher than expected, Ownwell can review your assessment and protest on your behalf. You only pay if we save you money.
Property Tax Rates Across Keystone, Summit County, Colorado
As noted earlier, local government entities set tax rates, which can vary widely within a state.
Why? Because annually, each county estimates its required budget to provide services and divides that by the total value of all taxable property within its jurisdiction. This calculation results in the property tax rate.
While there are votes and laws involved in setting tax rates and budgets, in a nutshell, this is the annual process.
Below, you can compare Keystone's effective property tax rate to other cities in Colorado and the median property tax rates in Colorado and the U.S.
Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective Keystone Tax Rate
0.34%
Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective Summit County Tax Rate
0.34%
Median Effective Colorado Tax Rate
0.50%
Median Effective United States Tax Rate
1.02%
Property Tax Rates Across Keystone, Summit County, Colorado
| Zip | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 80435 | 0.33% | 0.33% | 0.34% | 0.34% | 0.35% |
Source: Ownwell
Property Tax Assessment Values Across Keystone, Summit County, Colorado
When examining property taxes in Keystone, Colorado, understanding the distinction between "market value" and "assessed value" is crucial.
The market value is what a willing buyer would pay to a willing seller in an open and competitive market, often influenced by location, property condition, and economic market trends. The Summit County appraisal district estimates the market value for tax purposes.
The assessed value is the market value minus any applicable exemptions or limits determined by local laws and offerings. The tax assessed value is the figure used to calculate your property taxes or the amount multiplied by your tax rate to get your tax bill.
Assessment notices:
In Summit County, assessment notices are sent in the spring each year. They'll typically reach your mailbox by the middle of the month when notices are sent.
Each property owner receives an assessment notice that contains both the market value and assessed value, along with an estimate of your property tax bill. By providing insights into how assessed and market values are determined, this section helps property owners navigate their tax responsibilities and understand the valuation processes affecting their property taxes in Keystone.
For example, the median home price in Keystone is $841,200, with tax bills ranging significantly across the county. 80435 has the highest median home price at $841,200.
Property Tax Assessment Values Across Keystone, Summit County, Colorado
Source: Ownwell
$841,200
$1,095,100
$1,349,000
Median Keystone Market Value
$841,200
Median Summit County Market Value
$993,650
Median Colorado Market Value
$519,879
Median United States Market Value
$235,294
Property Tax Assessment Values Across Keystone, Summit County, Colorado
| Zip | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 80435 | $553,540 | $658,400 | $841,200 | $970,600 | $1,387,140 |
Source: Ownwell
Property Tax Bills Across Keystone, Summit County, Colorado
Property tax bills in Keystone are calculated from the assessed value of a home and the local tax rate applied to that value. Because the median home price is $841,200, many homeowners face bills that are higher than the national median property tax bill of $2,400. In Summit County, the median property tax bill is $2,786, showing how local home values and tax rates combine to shape what owners owe each year.
The final bill depends on the market value of the property, the assessment process, and any exemptions or local tax rules that may apply. Homes with higher assessed values generally receive larger tax bills, while lower assessed values can reduce the amount owed. In Keystone, property tax bills typically range from $2,184 at the 25th percentile to $3,294 at the 75th percentile, with the 90th percentile reaching $4,671. For homeowners, these differences can have a meaningful impact on annual housing costs and long-term affordability.
Median Keystone Tax Bill
$2,786
Median Summit County Tax Bill
$3,489
Median Colorado Tax Bill
$2,732
Median United States Tax Bill
$2,400
Property Tax Bills Across Keystone, Summit County, Colorado
| Zip | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 80435 | $1,805 | $2,184 | $2,786 | $3,294 | $4,671 |
Source: Ownwell
Don't miss the deadline to appeal!
Dates | |
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| Appeal Deadline | June 1 |
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