Boulder, Boulder County, Colorado Property Taxes

Name: Property Tax Bills Across Boulder, Boulder County, Colorado
Creator: Ownwell
License: https://creativecommons.org/licenses/by-nc/4.0/

Median Boulder, CO effective property tax rate: 0.49%, significantly lower than the national median of 1.02%, but lower than the Colorado state median of 0.55%.
Median Boulder, CO home value: $999,800
Median annual Boulder, CO tax bill: $4,713, $2,313 higher than the national median property tax bill of $2,400.

How are property taxes in Boulder County calculated?

Property taxes in Boulder, CO 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 Boulder’s property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in Boulder, knowing local tax details benefits homeowners and investors.

Last Updated March 1, 2025

Boulder, Boulder County, Colorado Property Tax Bill Calculator

Property Assessed Value

$100,000

$1,500,000

$3,000,000

Median Effective Tax Rate

0.49%

Estimate Property Tax Bill

$4,899

$4,546

Ownwell’s Boulder Property Tax Bill Calculator empowers homeowners, real estate investors, and potential buyers to estimate their annual property taxes in Boulder with just two data points. By entering your property's estimated assessed value, our calculator applies Boulder’s median effective tax rate to accurately estimate your property tax bill. Note that your property's assessed value — determined by your county — reflects any exemptions you may have, ensuring a precise calculation for your property tax obligations. This insightful tool helps you understand potential tax liabilities and highlights how Ownwell can assist in reducing property taxes in Boulder County. For those interested in more localized information, please scroll down to explore city-level trends!

Property Tax Rates Across Boulder, Boulder County, Colorado

Local government entities, including those in Boulder County, CO, set tax rates that can vary significantly within the state. This variation stems from each county's annual process of estimating the necessary budget to provide essential services. The county then divides this budget by the total value of all taxable property within its jurisdiction, resulting in the property tax rate. While votes and legislation play a role in setting these rates and budgets, this is the core of the annual procedure.

In Boulder, the effective property tax rate is a point of interest when compared to other cities in Colorado and the broader U.S. landscape. Boulder County's median property tax rate stands at 0.49%, which is notably below the national median of 1.02%. Within Boulder, the highest median tax rate is 0.50% in the 80302 zip code, while the lowest is 0.48% in the 80304 zip code. These figures highlight the relatively low property tax burden in Boulder compared to many other regions, potentially making it an attractive location for property owners seeking lower tax obligations.

Property Tax Rates Across Boulder, Boulder County, Colorado

Source: Ownwell

0.35%

0.47%

0.58%

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 Boulder Tax Rate

0.49%

Median Effective Boulder County Tax Rate

0.50%

Median Effective Colorado Tax Rate

0.55%

Median Effective United States Tax Rate

1.02%

Property Tax Rates Across Boulder, Boulder County, Colorado

Zip	10th Percentile	25th Percentile	Median Tax Rate	75th Percentile	90th Percentile
80301	0.40%	0.46%	0.49%	0.55%	0.57%
80302	0.41%	0.46%	0.50%	0.54%	0.59%
80303	0.41%	0.45%	0.48%	0.54%	0.58%
80304	0.41%	0.45%	0.48%	0.53%	0.57%
80305	0.42%	0.46%	0.48%	0.49%	0.53%

Source: Ownwell

Property Tax Assessment Values Across Boulder, Boulder County, Colorado

When examining property taxes in Boulder, CO, 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 Boulder County Assessor 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.

In Boulder County, assessment notices are sent in the spring each year. They’ll typically reach your mailbox by the middle of May. 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 Boulder.

For example, the median home price in Boulder is $999,800, with tax bills ranging significantly across the county. Zip code 80304 has the highest median home price at $1,279,300.

Property Tax Assessment Values Across Boulder, Boulder County, Colorado

Source: Ownwell

$410,300

$977,725

$1,545,150

Median Boulder Market Value

$999,800

Median Boulder County Market Value

$722,900

Median Colorado Market Value

$405,540

Median United States Market Value

$235,294

Property Tax Assessment Values Across Boulder, Boulder County, Colorado

Zip	10th Percentile	25th Percentile	Median Home Price	75th Percentile	90th Percentile
80301	$240,067	$383,588	$712,600	$1,086,325	$1,517,250
80302	$405,971	$715,371	$1,141,450	$1,720,500	$2,627,050
80303	$376,408	$528,440	$881,500	$1,243,550	$1,643,960
80304	$172,863	$678,421	$1,279,300	$1,860,000	$2,682,610
80305	$651,080	$839,350	$1,038,250	$1,348,025	$1,843,330

Source: Ownwell

Property Tax Bills Across Boulder, Boulder County, Colorado

Property tax bills in Boulder, CO are determined by assessing the property's market value and applying the local tax rate. With a median home price of $999,800, the tax burden can be significant for homeowners. The median tax bill in Boulder is notably higher than the national median of $2,400, with some residents in ZIP code 80304 facing bills as high as $5,970. Factors influencing property taxes include the home's assessed value and the local government's budgetary needs. Homeowners in Boulder can see tax bills ranging from $2,950 at the 25th percentile to $10,037 at the 90th percentile. This variability underscores the importance of ensuring that properties are correctly assessed. Ownwell specializes in property tax appeals and exemptions, helping homeowners potentially reduce their tax obligations. By leveraging expert knowledge and local market insights, Ownwell can guide homeowners through the appeal process, ensuring they only pay what is fair. This service can lead to significant savings, providing financial relief to property owners.

Property Tax Bills Across Boulder, Boulder County, Colorado

Source: Ownwell

$1,435

$4,708

$7,981

Median Boulder Tax Bill

$4,713

Median Boulder County Tax Bill

$3,545

Median Colorado Tax Bill

$2,283

Median United States Tax Bill

$2,400

Property Tax Bills Across Boulder, Boulder County, Colorado

Zip	10th Percentile	25th Percentile	Median Tax Bill	75th Percentile	90th Percentile
80301	$1,322	$2,112	$3,462	$5,118	$7,147
80302	$2,216	$3,493	$5,450	$8,363	$13,200
80303	$1,945	$2,701	$4,187	$5,698	$7,667
80304	$1,034	$3,530	$5,970	$8,548	$12,719
80305	$3,202	$4,034	$4,898	$6,297	$8,701

Source: Ownwell