Property Tax Map

• Actual Value: The price a property would sell for on the market (also known as market value).
• Assessed Value: The actual value multiplied by the appropriate assessment rate based on property type. The assessed value is used for calculating property taxes. This is generally lower than the actual value. The legislature sets the assessment rate.
• County Assessor: Identifies and values all real and personal property in the county as of the assessment date.
• County Treasurer: Administers the collection and disbursement of county taxes and revenues.
• Mill: One mill equals one-thousandth of a dollar or $1 of tax per $1,000 of assessed value.
• Mill Levy: Tax rate applied to the property’s assessed value, set by local taxing entities.
• Taxing District (Tax area): A geographic area where all properties are served by the same taxing entities.
• Taxing Entity (Taxing jurisdiction, Special District): A political body with the authority to levy property tax, such as a school district, fire district, city, county, etc.
• Value Adjustment: Lowers property taxes by subtracting the statutory value adjustment from the actual value, before calculating assessed value.

The Geographic Information System (GIS) map is designed to operate with most computer internet-based browsers. Make sure you have a strong internet connection, try a different browser, clear your browser's cache and history, or solicit assistance from an IT professional.

Search for your address then click on your property on the map. If a popup window comes up, click the right arrow at the top of the popup window to get to page 2. If a popup window doesn't show up, or does not contain your actual value, visit your county assessor website. Not all counties provide this data to the state.

Ensure you input the correct actual value, property type, and tax year. If it still doesn't look correct, visit your county's assessor or treasurer office website.

Please contact your County Assessor for tax district information. Links to the assessor websites can be found in the popup when you click a parcel on the map. They can also be found in the tax calculator tab when you search for an address. The map may not have all the districts available.

Try typing your complete address in the search bar in the top right corner of the Home page. Check the County Assessor website to ensure it is correct. If you are still having issues, email dola_propertytaxmap@state.co.us with details.

Each year parcel data is collected from counties around the state. If a county doesn't want to provide its data or cannot, then they are omitted from this dataset. Some counties do not include all information, so they may be missing information, like addresses. Please contact your County Assessor, or check their website, for correct information. Please email details of the discrepancy to dola_propertytaxmap@state.co.us.

No, the information contained in the Property Tax Map is unaudited information. It is not a definitive record of property information, local government boundaries, or taxes. Contact your County Assessor or County Treasurer's office for official information.

Contact dola_propertytaxmap@state.co.us with details.

Annually, typically during the month of March.

The property assessment process is the basis for generating property tax revenues to pay for roads, schools, parks, libraries, fire protection, police protection, water, sewer, health, and other services.

Actual value x assessment rate x mill levy = property tax amount.

The actual value is determined by the County Assessor. Assessment rates are determined by the Colorado Legislature. Mill levy is determined by local taxing entities. View a detailed example of how taxes are calculated.

Section 39-3-103 requires the County Assessor to consider the cost, market, and income approach to appraisal. Residential real property must be valued solely through consideration of the market approach. Learn more about property valuation.

Tax rates (mill levies) are determined annually by each local taxing entity at their budget meetings, typically held in the fall of each year. Mill levies are certified by the Board of County Commissioners no later than December 22, each year. Taxing authorities provide local services.

Visit the county Assessor’s Office, or their website, to review and verify information on your property. Analyze market data and information as of the statutory appraisal date, June 30th of each even-numbered year. Learn more about the appraisal process.

Property owners can appeal the assessor’s actual value of their property between May 1 and June 8 of each year. You may appeal your assessor’s actual value by mail, in person, or by phone. Learn more about the remedy process.

January 1 of each year. Learn more about property valuation.

The TABOR Amendment restricts the total amount of revenue growth and individual taxing entities (a cemetery district, for example) are allowed each year. This is computed by each entity utilizing a formula that takes into account inflation, new construction in the taxing entity’s boundaries, and other factors. The Amendment does not restrict the amount that an individual’s property taxes may change, nor does it place a specific percentage limitation on any individual’s property tax change.

The links to the assessor and treasurer websites can be found in the popup when you click a parcel on the map. They can also be found in the tax calculator tab when you search for an address.

For property valuation questions, contact the County Assessor where your property is located.

For questions about your Property Tax, contact your County Treasurer.

For all other questions contact dola_propertytaxmap@state.co.us.