Assessor's Office


The primary responsibility of the assessor is to determine and maintain the current and correct fair market value of your property, ensuring that you pay only your fair share of taxes. The amount of taxes you pay is determined by a tax rate applied to your property's assessed value, which is set by all taxing agencies and varies based on the services required.


In addition to this, the Assessor's Office keeps track of ownership changes, maintains maps of parcel boundaries, updates descriptions of building and property characteristics, and tracks individuals and properties eligible for exemptions and other property tax relief. The Assessor's Office also analyzes trends in sales prices, construction costs, and rents to estimate the value of all assessable property.


The Assessor's Office is subject to review by the Property Tax Division of New Mexico, which is responsible for the general supervision of Assessors in New Mexico and enforcing property tax laws.


Please contact the Assessor's Office for comments, question or concerns. George Chandler is available for in-person visits every Monday from 9:00am to 12:00pm at the Assessor's Office.


***Please be advised appraisers will be conducting field inspections and taking photos of properties in the western area and downtown eastern area residential neighborhoods.***


Publications and Presentations

Helpful Tips
Helpful Tips(PDF, 471KB)

Videos and Presentations

Three Percent Cap
Videos and Presentations

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

NOV's and Exemptions
Description of the Notice of Valuation process and Exemptions.

Property Valuation & Maintenance Plan(PDF, 6MB)
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

Department Head


George Chandler

Term Ends December 31st 2026