Los Alamos County, NM Property Taxes (2026)

Los Alamos County owners pay a median of $2,591 a year on a median home value of $452,500, an effective rate of 0.57%. That's the 12th-highest rate of 33 New Mexico counties with Census data, above the New Mexico county median of 0.55%.

Updated October 2026 · Data: U.S. Census Bureau, American Community Survey 5-Year Estimates (2019–2023)

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Effective tax rate

0.57%

12th highest of 33 in NM

Median annual bill

$2,591

~$216/month

Median home value

$452,500

New Mexico county median

0.55%

Effective rate

What a protest could save you in Los Alamos County

Enter the market value from your appraisal notice. We apply Los Alamos County's 0.57% effective rate and a 10–15% reduction, the typical range for successful protests.

$
Est. annual tax
$2,579
Savings at 10–15% off
$258–$387
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Los Alamos County vs. New Mexico vs. U.S. property tax rates

Los Alamos County0.57%
New Mexico county median0.55%
U.S. county median0.84%

Key stat: Los Alamos County's effective property tax rate is 0.57%, vs. 0.55% for the median New Mexico county and 0.84% for the median U.S. county. It ranks 12th of 33 in New Mexico. Effective rate = median tax bill ÷ median home value, so it already reflects typical exemptions. (Source: U.S. Census Bureau, American Community Survey 5-Year Estimates (2019–2023))

How to appeal your property taxes in Los Alamos County

  1. 1

    Review your assessment notice

    Check the assessed value from the Los Alamos County Assessor. Compare it to recent sales of similar homes nearby.

  2. 2

    File your appeal before the deadline

    The Los Alamos County deadline is Within 30 days of notice. Missing it means waiting until the next assessment year.

  3. 3

    Gather evidence

    Recent comparable sales, photos of condition issues, repair estimates or an independent appraisal.

  4. 4

    Present your case

    Submit evidence or attend a hearing with the County Assessor.

  5. 5

    Get your decision

    If you win, your assessed value and bill go down. On a $2,591 bill, 10–15% off is $259–$389 a year.

Want help with it?

TaxDrop builds your case from comparable sales data.

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Property tax exemptions in New Mexico

New Mexico homeowners may qualify for exemptions that reduce taxable value. Check with the Los Alamos County Assessor for amounts.

Homestead exemption

For your primary residence. Reduces the value used to calculate your bill.

Senior / over-65

Many states add an exemption or freeze for owners 65 and older.

Disability

For homeowners with qualifying disabilities, often similar to the over-65 benefit.

Veterans

Disabled veterans may get partial or full exemptions depending on rating.

Frequently Asked Questions

What is the property tax rate in Los Alamos County, New Mexico?
The median effective property tax rate in Los Alamos County is 0.57%: a median annual bill of $2,591 on a median home value of $452,500. That's the 12th-highest rate of 33 New Mexico counties with Census data. Your own rate depends on which city, school district and special districts you're in. Source: U.S. Census Bureau, American Community Survey 5-Year Estimates (2019–2023).
How much are property taxes in Los Alamos County?
The median Los Alamos County property tax bill is $2,591 a year, about $216 a month, compared with a New Mexico county median of $893.
What is the deadline to appeal property taxes in Los Alamos County?
The deadline to appeal in Los Alamos County is Within 30 days of notice. Missing it means waiting until the next assessment cycle.
Is Los Alamos County a high property tax area?
Los Alamos County's 0.57% effective rate is above the New Mexico county median of 0.55% and below the U.S. county median of 0.84%. That's the 12th-highest rate of 33 New Mexico counties with Census data.
Can TaxDrop help lower my Los Alamos County property taxes?
TaxDrop analyzes your property against local comparable sales and helps you appeal your assessment.

Property taxes in nearby counties

Santa Fe County

Rate: 0.51%

Median bill: $2,110

Sandoval County

Rate: 0.76%

Median bill: $2,147

Rio Arriba County

Rate: 0.43%

Median bill: $1,000

Bernalillo County

Rate: 0.95%

Median bill: $2,544

Taos County

Rate: 0.33%

Median bill: $1,164

Mora County

Rate: 0.54%

Median bill: $642

Valencia County

Rate: 0.66%

Median bill: $1,365

San Miguel County

Rate: 0.56%

Median bill: $991

← All 33 New Mexico counties

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