Contact Info
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Contact Info



1000 Central Ave Suite 210, Los Alamos NM 87544

Monday - Friday

8:00 am - 5:00 pm

Ken Milder


Ken Milder
Term Ends December 31st 2022

The mission of the Los Alamos County Assessor’s Office is to provide excellent public service by providing complete, accurate and timely assessments of all property subject to taxation in accordance with the Property Tax Code applicable statutes, orders, regulations and laws, the tenants of the International Association of Assessing Officers, and Uniform Standard of Professional Appraisal Practice, with a well-managed office and professional staff.


  • Provide for a Property Valuation Maintenance Program that implements the process utilized in the valuation of property taxation and complies with the Property Tax Code.
  • Provide fair, uniform and equitable assessments on all real and personal property subject to property taxation, by utilizing a computer assisted mass appraisal (CAMA) system incorporated with a geographic information system (GIS).
  • Meet or exceed the requirements of the New Mexico Property Tax Division and the Property Tax Code for level of assessment and uniformity by constant market analysis.
  • Provide current, accurate information to the public as well as other departments and governmental entities upon which to base decisions on.
  • Conduct educational outreach programs to increase public awareness of assessment process and taxpayer benefits available.
  • Provide and maintain a professional, certified, and knowledgeable staff.

The Assessor's Office also welcomes any questions, comments or concerns. Please feel free to visit us at the address shown to the left or contact us by phone or mail.


NOV Image Assessor FAQ - Frequently Asked Questions Los Alamos County Property Tax Calendar Los Alamos County Property Tax Calculation Click here to File a Protest
Understanding the Residential 3% cap
Access Eagle Web Application Access Property and Assessor Forms Informational Pamphlets Get information about the tax schedule

Publications and Presentations

 Helpful Tips  Business Personal Property Video Presentation  Understanding NOV and 3% cap


2013 NM PTD Evaluation


"The overall operation of the Los Alamos County Assessor's Office is considered excellent."

-David Ortiz
Appraisal Bureau Chief
State of New Mexico Property Tax Division


Links and Documents

Description of the Notice of Valuation process and Exemptions.

Property Valuation & Maintenance Plan
Link to Assessor's annual Property Valuation & Maintenance Plan

Other Property Tax Related Links

New Mexico Property Tax Division
Information about the Appraisal Bureau, State Assessed Property Bureau and the Delinquent Property Tax Bureau.
New Mexico Department of Finance and Administration; Local Government Division
Assistance with the appropriate use of public funds.
New Mexico Association of Counties
Find out how counties work together to solve common problems.
New Mexico Department of Veterans Services
Information about support services for New Mexico Veterans
International Association of Assessing Officers (IAAO)
Resource of information for property appraisal, assessment administration, and property tax policy.
Office of The State Engineer
Click link to see how water right transfers are affected by state law.
New Mexico Livestock Board
Click here for information regarding livestock registry, inspections and transfers.
New Mexico Manufactured Housing Division
Click here for information related to Manufactured Homes