Alamosa County Assessor


The County Assessor is responsible for valuing all real and personal property, including mobile homes, residential and commercial properties and agricultural land for property tax purposes.

The Assessor determines the equitable value of property to ensure that each taxpayer pays only his or her share of the taxes. Anyone who disagrees with changes in the actual value of real property can object or file a protest with the Assessor’s Office.


Ph. (719) 589-6365| F. (719) 589-6118
8999 Independence Way | Suite 105
Alamosa, Colorado 81101
Monday-Friday 8:00 a.m. - 4:30 p.m.


County Assessor Sandra Hostetter

County Assessor
Sandra Hostetter


Photo Credit: NPS/Patrick Myers



2023 Reappraisal

Every odd year across Colorado, assessors are tasked with a re-evaluation of the entire County.  

2023 Notices of Value will be mailed out on May 1.  The month of May is your opportunity to discuss or appeal your property classification and/or value.  The appeal period ends on June 1, 2023.  Please use this time to exercise your rights as a property owner.  You may submit a written appeal, e-mail, phone call, or you may appear in person.

Vacant land and residential property are valued according to the market.  Commercial property is valued considering the three approaches to value; cost, market and income.  Agricultural property is valued using a formula provided by the Division of Property Taxation.  Agricultural values are calculated using the formula and inputting income minus expenses.  A ten-year average of expenses is used.

The data collection period for the 2023 reappraisal is 01/01/2021 – 06/30/2022.  Qualified sales during this time period are analyzed and used in establishing the value for comparable properties.

The year 2022 continued to see records numbers of sales.  While you would think values might decrease due to COVID 19, the opposite actually occurred for vacant land and residential properties.  The real estate market saw an increase in the number of transactions as well as an increase in sales prices. 

The office staff is working diligently to establish accurate values and to insure that properties are valued fairly and equitably.

Our office is open Monday-Friday from 8:00 am until 4:30 pm.  We can be reached at (719) 589-6365.


Senior Citizen Exemption 

The Assessor's office has served over 800 senior citizens who have been approved to receive the “Senior Homestead Exemption”. The maintenance of this program is paramount to our office, and we will continue to administer the Senior Homestead Program.

For qualifying seniors, this exemption reduces the property tax on the primary residence by exempting 50% of the first $200,000 in market value. For example:

  • If your primary residence has a market value of $200,000, the first $100,000 will be exempt from taxation.
  • If your primary residence has a market value of $175,000, the first $87,500 will be exempt from taxation, etc.

If you have previously applied and been approved for participation in the Senior Exemption Program, you need take no further action. Your initial application is still in effect. The Assessor must be informed of any changes in ownership or occupancy of the property within 60-days of when the change occurs. IF ADDITIONAL INFORMATION IS NEEDED, WE WILL CONTACT YOU! 

         Eligibility for Exemption

You must be at least 65 years of age as of January 1 of the year of application,

  • Owned their home for at least 10 years as of January 1.
  • Occupied it as their primary residence for at least 10 years as of January 1.
  • Limited exceptions to the ownership and occupancy requirements are detailed in the qualifications section of the application.
  • The senior citizen exemption is also available to surviving spouses of senior citizens who met the requirements on any January 1st after 2001. The application deadline is July 15.

Good News for Senior Citizens

Property Tax Exemptions for Veterans

The Disabled Veteran exemption is available if:

  1. The veteran sustained a service-connected disability while serving on active duty in the Armed Forces of the United States. This includes members of the National Guard and Reserves who sustained their injury during a period in which they were called to active duty.
  2. The veteran was honorably discharged.
  3. The federal Department of Veterans Affairs has rated the veteran's service-connected disability as a one hundred percent permanent disability through disability retirement benefits pursuant to a law or regulation administered by the department, the U.S. Department of Homeland Security, or the Department of the Army, Navy, or Air Force.
  • VA unemployability awards do not meet the requirement for determining an applicant’s eligibility.
  • The applicant must have owned and occupied the home as his or her primary residence since January 1 of the year of application,
  • Limited exceptions to the ownership and occupancy requirements are detailed in the eligibility requirements section of the application.
  • The application deadline is July 1.
  • For questions call (303) 343-1268 

Line of Soldiers Walking

Frequently Asked Questions


Pursuant to Colorado State Statute C.R.S. Article 3, Title 39, all taxable and exempt property is valued by the county assessor valuation criteria as stipulated by statute and by using manuals, appraisal procedures, and instructions issued by the Property Tax Administrator.

  • The total value as determined by the County Assessor is certified to the county entities and the state.
  • Each entity certifies a mill levy to the Assessor and then it is the duty of the Assessor to extend the tax on all property assessed and direct the County Treasurer to collect the taxes.

All property, real and personal, located in the State of Colorado on the assessment date, January 1, is taxable unless expressly exempted by the Constitution or state statutes. Article X, Section 3, Colorado Constitution, and 39-1-102 (16), C.R.S.

  • Most property in Colorado is valued using the three approaches to value:
    • The market approach, the cost approach, and the income approach.
  • The exceptions to the three approaches include residential real property (market only), agricultural land, and natural resource land (special valuation procedures based on productivity and production).
  • The market, cost, and income data that county assessors use to apply the appropriate approaches to value is collected during specific periods prescribed by statute and represent a certain ''level of value''.
  • Property taxes are not calculated on the ''full actual value'' as determined by the assessor. Instead, an assessment percentage is applied according to the classification of the property. 39-1-104(1) and (1.5), C.R.S.
  • Residential property is assessed at a percentage of the actual value; currently, this percentage is 7.15% while most other property is assessed at 29%.

A property owner must be sent a notice of valuation (NOV) every year.

  • This notice must be mailed no later than May 1.
  • In the language of the notice is stated the actual value that the assessor has assigned to your property.
  • This notice of valuation is not a tax bill.
  • The purpose of this notice is to inform you of any change in your property valuation and advises you of your right to appeal the value.

If a taxpayer disagrees with the value assigned by the assessor, the taxpayer may file a protest during the statutory protest period.

  • Real property protests must be postmarked no later than June 1, or a taxpayer may appear in person to protest no later than June 1. 39-5-121(1), C.R.S.
  • Personal property protests must be postmarked no later than June 30, or a taxpayer may appear in person to protest no later than July 5. 39-5-121(1.5), C.R.S.
  • A protest form is included with the notice of valuation: however it is not mandatory for the taxpayer to use this form, or any other particular form, when protesting.

All personal inquiries and letters/faxes received during the protest period are processed and reviewed.

  • The assessor's staff corrects any erroneous or improper valuations.
  • If the assessor determines that the value is correct, no adjustments will be applied.
  • In each determination, the assessor includes the reason(s) for denial and information regarding the taxpayer's right of appeal to the county Board of Equalization.

NO! Colorado statutes require that the sitting assessor hear protest on valuation that has been assigned by the assessor.

    The assessor does not assign taxes.
    Taxes include a number of components that are beyond the assessor's control, such as mill levy and assessment rate.
        The assessment rate is set by the State Legislature and mill levies are determined by each governing entity such as schools, city or county, fire department, etc.
    The end results of these components determine the amount of taxes levied. The following is an example of how taxes are determined.

Property Type: Residential Non-Residential
Assigned by Assessor: $100,000   $100,000
State Statutes: x    .0796 x        .29
Assessed Value: $7,960 $29,000
Mill Levy assigned by an entity: x.074201 x .074201
Taxes Due: $590.64 $2,151.83

Agricultural land valuation is directed by Section 3(1)(a), article X of the Colorado Constitution and are calculated on the earning capacity of the land, using a ten year average of commodity prices, locally researched expenses and factors supplied by the Division of Property Taxation. Each of the Assessor’s offices are audited to verify that their calculations fall within the guidelines prescribed by the Colorado Constitution.