Los Alamos County, New Mexico Property Taxes
Property Taxes in Los Alamos County, New Mexico
Median Los Alamos County effective property tax rate: 0.76%, significantly lower than the national median of 1.02%.
Median Los Alamos County home value: $367,265
Median annual Los Alamos County tax bill: $2,686, higher than the national median property tax bill of $2,400.
How are property taxes in Los Alamos County calculated?
Property taxes in Los Alamos County are calculated based on the tax assessed value, which is often lower than the actual market value due to property tax exemptions such as the homestead or senior exemption.
Understanding your county's property tax system, exemptions, and reduction opportunities can lead to significant savings. Whether you live in Los Alamos or another part of Los Alamos County, knowing local tax details benefits homeowners and investors.
Last Updated April 13, 2026
Los Alamos County, New Mexico Property Tax Bill Calculator
$100,000
$1,500,000
$3,000,000
Median Effective Tax Rate
0.76%
Estimate Property Tax Bill
$2,791
$2,590
How Does the Los Alamos County Property Tax Calculator Work?
Use this Los Alamos County property tax calculator to estimate your annual property tax bill. Enter your property’s assessed value and the calculator applies Los Alamos County’s median effective tax rate of 0.76% to generate your estimate.
Enter your property’s estimated assessed value — the figure the appraisal district assigns for tax purposes, which is typically lower than market value after applicable exemptions. The calculator uses the median effective rate for a more accurate estimate than the statutory millage rate alone.
Your actual bill may vary based on your specific exemptions, local school district levies, and any special assessment districts that apply to your property.
Los Alamos County’s median tax rate is lower than New Mexico’s 0.85% and well below the national median property tax rate of 1.02%. The county’s median tax bill is $2,686, compared with the national median property tax bill of $2,400 and $286 lower than New Mexico.
Property Tax Rates Across Los Alamos County, New Mexico
What Are Effective Property Tax Rates Across Los Alamos County?
Local government entities set tax rates, which vary widely across Los Alamos County. Each year, the county estimates its budget for public services and divides that total by the assessed value of all taxable property within its jurisdiction.
Below, compare Los Alamos County's effective property tax rate to other counties in New Mexico or the U.S. median of 1.02%.
Los Alamos County's median effective rate stands at 0.76%, which is lower than the national median of 1.02%. Within Los Alamos County, the highest rate is found in LOS ALAMOS at 0.76%, while WHITE ROCK has the lowest at 0.76%.
These variations reflect differences in local school district levies, special assessment districts assessments, and special district bonds — which compound the base county rate.
Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective Los Alamos County Tax Rate
0.76%
Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective New Mexico Tax Rate
0.85%
Median Effective United States Tax Rate
1.02%
Property Tax Rates Across Los Alamos County, New Mexico
| City | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| Los Alamos | 0.72% | 0.75% | 0.76% | 0.76% | 0.76% |
| White Rock | 0.72% | 0.75% | 0.76% | 0.76% | 0.76% |
Source: Ownwell
Property Tax Assessment Values Across Los Alamos County, New Mexico
When examining property taxes in Los Alamos County, understanding the distinction between "market value" and "assessed value" is crucial.
The market value is what a willing buyer would pay to a willing seller in an open and competitive market, often influenced by location, property condition, and economic market trends. The Los Alamos County assessor estimates the market value for tax purposes.
The assessed value is the market value minus any applicable exemptions or limits determined by local laws and offerings. The tax assessed value is the figure used to calculate your property taxes or the amount multiplied by your tax rate to get your tax bill.
Assessment notices:
In Los Alamos County, assessment notices are sent in the spring each year. They'll typically reach your mailbox by the middle of April.
Each property owner receives an assessment notice that contains both the market value and assessed value, along with an estimate of your property tax bill. By providing insights into how assessed and market values are determined, this section helps property owners navigate their tax responsibilities and understand the valuation processes affecting their property taxes in Los Alamos County.
For example, the median tax bill in Los Alamos County is $2,686, compared with the national median property tax bill of $2,400. Tax bills range from $1,887 at the 25th percentile to $3,789 at the 75th percentile and $5,011 at the 90th percentile. Los Alamos has the highest median home price at $369,610.
Property Tax Assessment Values Across Los Alamos County, New Mexico
Source: Ownwell
$362,490
$366,050
$369,610
Median Los Alamos County Market Value
$367,265
Median New Mexico Market Value
$129,686
Median United States Market Value
$235,294
Property Tax Assessment Values Across Los Alamos County, New Mexico
| City | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| Los Alamos | $148,468 | $236,310 | $369,610 | $521,840 | $678,144 |
| White Rock | $224,170 | $281,940 | $362,490 | $507,360 | $661,560 |
Source: Ownwell
Property Tax Bills Across Los Alamos County, New Mexico
Property tax bills in Los Alamos County are based on the assessed value of a home and the local tax rate. When a property’s market value rises, the tax bill can increase as well, even if the homeowner has not made any changes to the house. For a county with a median home price of $367,265, the property tax burden can be significant for many households.
The typical bill in the county ranges from $1,887 at the 25th percentile to $3,789 at the 75th percentile, with the 90th percentile reaching $5,011. The highest median tax bill is $2,706 in Los Alamos, while White Rock has the lowest median tax bill at $2,667. Compared with the national median property tax rate of 1.02% and the national median property tax bill of $2,400, homeowners in Los Alamos County may see bills that are above or below the national norm depending on location and assessed value.
Median Los Alamos County Tax Bill
$2,686
Median New Mexico Tax Bill
$1,249
Median United States Tax Bill
$2,400
Property Tax Bills Across Los Alamos County, New Mexico
| City | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| Los Alamos | $1,084 | $1,738 | $2,706 | $3,838 | $5,007 |
| White Rock | $1,664 | $2,080 | $2,667 | $3,705 | $5,022 |
Source: Ownwell
Don't miss the deadline to appeal!
Dates | |
|---|---|
| Appeal Deadline | May 1 |
Links | |
|---|---|
| Los Alamos Tax Assessor | |
| Website | eagleweb.losalamosnm.us |