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Single Family ResidenceResidential
$666,768$368 / ft²
TopHap EstimateOur estimate of what this home would sell for today, based on nearby sales, the home's size and features, and local price trends. It is a starting point, not an appraisal.· confidence 95How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Sep 24, 2026
Last sold for $410,600 on Oct 1, 2018

728 42ND ST

LOS ALAMOS, NM 87544
3
Beds
1 / 1
Baths
1,813 ft²
Living AreaTotal finished area of the structures, from county records. Some counties include shared space like hallways or a building gym, so it may not match a listing.
0.26 ac
Lot SizeThe size of the land the home sits on, from county records.
1947
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
6
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$667K
$633K low$700K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$410,600 · Oct 1, 2018

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,007 (2026)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$130,450 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$33,140
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$97,310
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$126,660
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$391,360

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyLOS ALAMOS
Effective Year BuiltAn adjusted build year that accounts for condition and major remodels. A big renovation can make a home count as newer than it is.2006
Lot (acres)The size of the land the home sits on, from county records.0.26
RoofThe main material covering the roof, such as asphalt shingle or tile.Builtup (layered Asphalt)
HeatingThe type of heating system in the home.Hot Water
CoolingThe type of cooling or air conditioning in the home.None
FireplaceWhether the home has a fireplace, and what kind.Yes
GarageWhether the property has a garage, and details like whether it is attached to the home.Carport (Unspecified)
PoolWhether the property has a pool, and what kind, such as in-ground.No
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Patio · 377 ft²Porch · 75 ft²

Transaction History(2)

Sales and refinances filed with the county for this home. Not every transfer is a normal sale, so check the type before comparing prices.

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

H
Los Alamos High SchoolB+
High · Grades 10–12 · 0.4 mi
E
Mountain Elementary SchoolA-
Elementary · Grades KG–6 · 1.0 mi
M
Los Alamos Middle SchoolA
Middle · Grades 7–8 · 1.6 mi

District: Los Alamos Public Schools

Neighborhood · ZIP 87544These are comparison scores, not percentages. 100 equals the national average, so 150 means about 50% above average.

CrimeLocal crime compared with the rest of the country, where 100 is average. It reflects things like population density, income, and how crime gets reported.107
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.88
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.116

Index scale: 100 = US average (tick). Lower is better.

Homes occupiedThe share of homes here that someone lives in. The rest sit empty, including vacation and for-sale homes.93%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.28%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.5.1%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.7%
PopulationHow many people live in this area.16,205
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.54 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$134,232
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$159,555
Average tempThe average temperature here across a full year.50°F
Annual precipHow much rain and melted snow falls here in a typical year.16 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.76%

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Data by ATTOM. Valuations are automated estimates, not appraisals. Photos from Google Street View and may not depict the current property state.

How this home compares

728 42nd St measured against every home in its neighborhood, its ZIP code and its county, using county assessor records refreshed nightly. A home can stand out in one of those areas and look ordinary in another, because each one holds a different mix of homes.

  • Costs more per square foot than 89% of homes in Los Alamos County
  • Older than 96% of homes in Los Alamos County

What homes are worth in Los Alamos 87544

Each bar is how many homes fall in that price range. The marker is this home.

This home
$306K$1.2M

This home is worth more than 56% of homes in Los Alamos 87544.

How it measures up in Los Alamos 87544

The dot is this home. The mark in the middle is the typical home in Los Alamos 87544.

Estimated value$666,768
CheaperTypical $641,533Pricier

Pricier than 56% of homes nearby

Price per ft²$368
CheaperTypical $305Pricier

Pricier than 87% of homes nearby

Living area1,813 ft²
SmallerTypical 2,039 ft²Bigger

Bigger than 41% of homes nearby

Lot size0.26 ac
SmallerTypical 0.22 acBigger

Bigger than 59% of homes nearby

Year built1947
OlderTypical 1968Newer

Newer than 7% of homes nearby

How 728 42nd St ranks against every home in each area.
MeasureThis homeLos Alamos 87544Los Alamos County
Estimated valuepricier than$666,76856% of homes61% of homes
Price per ft²pricier than$36887% of homes89% of homes
Living areabigger than1,813 ft²41% of homes41% of homes
Lot sizebigger than0.26 ac59% of homes55% of homes
Year builtnewer than19477% of homes4% of homes

About 728 42nd St

How much is 728 42nd St, Los Alamos, NM worth?

The TopHap Estimate for 728 42nd St, Los Alamos, NM is $666,768 as of Sep 24, 2026. The likely range is $633,314 to $700,222. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 728 42nd St, Los Alamos, NM last sell?

728 42nd St, Los Alamos, NM last sold on Oct 1, 2018 for $410,600, according to the county's recorded deed.

How big is 728 42nd St, Los Alamos, NM?

728 42nd St, Los Alamos, NM has 3 bedrooms, 1 bathrooms, 1,813 square feet of living space and a 0.26-acre lot.

When was 728 42nd St, Los Alamos, NM built?

728 42nd St, Los Alamos, NM was built in 1947, making it 79 years old. The building has 1 story.

What schools serve 728 42nd St, Los Alamos, NM?

728 42nd St, Los Alamos, NM is assigned to Los Alamos High School (high), rated B+; Mountain Elementary School (elementary), rated A-; Los Alamos Middle School (middle), rated A. All sit in Los Alamos Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 728 42nd St, Los Alamos, NM compare to other homes in Los Alamos 87544?

Among the 4,477 homes in Los Alamos 87544, it is worth more than 56% of them ($666,768 against a typical $641,533), its price per square foot is higher than 87% of them ($368 against a typical $305), it is bigger than 41% of them (1,813 ft² against a typical 2,039 ft²), its lot is bigger than 59% of them (0.26 ac against a typical 0.22 ac) and it is newer than 7% of them (1947 against a typical 1968). Measured against all of Los Alamos County, it is worth more than 61% of homes there. These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 728 42nd St, Los Alamos, NM?

The 2026 property tax bill for 728 42nd St, Los Alamos, NM was $3,007. The county assessed it at $130,450.

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