The effective property tax rate in Los Alamos County, New Mexico is 0.57%, based on 2024 Census Bureau data. The median annual property tax bill is $2,591 on homes with a median value of $452,500.
Based on the 0.57% effective rate. Actual taxes vary by assessed value and local exemptions.
| Home Value | Est. Annual Tax | Est. Monthly |
|---|---|---|
| $200,000 | $1,145/yr | $95/mo |
| $300,000 | $1,717/yr | $143/mo |
| $400,000 | $2,290/yr | $190/mo |
| $500,000 | $2,862/yr | $238/mo |
| $600,000 | $3,435/yr | $286/mo |
| $750,000 | $4,294/yr | $357/mo |
| $1,000,000 | $5,725/yr | $477/mo |
Property taxes in Los Alamos County, New Mexico are administered by the county assessor's office. Homes are typically reassessed on a regular cycle, and the tax rate (mill rate) is set annually by local government bodies.
1. Review your assessment. Request a copy of your property assessment and compare it to recent sales of similar properties in your neighborhood.
2. File an appeal. If your assessed value seems too high, you can formally appeal to the Los Alamos County Board of Assessment Appeals or equivalent body. Deadlines are typically 30–60 days after notice.
3. Check for exemptions. New Mexico offers several exemptions including homestead exemptions for primary residences, senior citizen discounts, veteran exemptions, and disability exemptions. Contact the Los Alamos County assessor's office to see what you qualify for.
Property tax due dates vary by county in New Mexico. Most counties bill annually or semi-annually. Contact your local county treasurer for exact payment schedules.
Property taxes, state income taxes, and deductions affect your federal return. Get clear, plain-English tax briefs from CapitalTaxBrief.com.