Costilla County Assessor
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Thomas Aragon
County Assessor
P.O. Box 344
San Luis, CO 81152
Phone: (719) 937-7670
eFax: (888) 709-5722
Email: assessor@costillacounty.net
Office Hours:
Monday - Thursday: 7:00 a.m. - 5:30 p.m.
No closure for lunch.
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THE COSTILLA COUNTY ASSESSOR'S OFFICE IS NOW RE-OPEN TO THE PUBLIC
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About Our Office
This office is directly responsible for discovering, locating, classifying and valuing properties. It is the responsibility of this office to update and maintain accurate property records. These records include improvements and all improvement characteristics, along with pictures of these improvements. Records also include land size, location, maps and transfer history.
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Staff
Thomas Aragon - Assessor
Ronda Lobato - Deputy Assessor/Chief Appraiser
Pamela Vigil - Office Manager
Steve Valdez - Transfer Clerk
Loryn DeLeon - Field Inspector
Angelica Valdez - Field Inspector
Benita Martinez - Administrative Assistant
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- 2023-2024 Reappraisal Information
Sales Gathering Period Timeline
Reappraisal Reduction Information for 2023 taxes
2023 Vacant Land Sales Book with Time Trend
2023 Agricultural Land Appraisal
Video on Colorado appraisal - https://youtu.be/zOfFnn_AJVE
Colorado Map on percentages of increase in each county- https://gis.dola.colorado.gov/Residential_Value_Change/
- 2021-2022 Reappraisal Information
Sales Gathering Periods Explanation
Agricultural Land Valuation Summary
- 2019-2020 Reappraisal Information
Residential Sales Reappraisal 2019
2023 Costilla County Property Assessment Study - A Procedural and Statistical Audit
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Abstract Brochures
Classification and Valuation of Agricultural Property
Understanding Property Taxes in Colorado
Property Valuation and Taxation for Business and Industry
Natural Disaster Valuation in Colorado
FORMS
Address Change Form (Download and save form to enter your information)
Petition for Abatement or Refund of Taxes (One Year Form)
Petition for Abatement or Refund of Taxes (Two Year Form)
Real Property Transfer Declaration (TD-1000)_Revised 1-16-21
VACANT LAND QUESTIONNAIRE 2019
Veteran with a Disability Application Instructions 2024
Veteran with a Disability Property Tax Exemption Application 2024
Veteran with a Disability Surviving Spouse Application 2024
Gold Star Spouse Instructions 2024
Gold Star Spouse Application 2024
Senior Citizen Long Form Application 2024
Senior Citizen Long Form Instructions 2024
Senior Citizen Short Form Application 2024
Senior Citizen Short Form Instructions 2024
Helpful Links
Colorado Assessors' Association
Click here to go to the "Assessor's Helpful Information" page