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Single Family ResidenceResidential
$2,870,273$1,069 / 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 91How 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 $536,000 on Jan 9, 1998

171 CASTRO LN

FREMONT, CA 94539
4
Beds
3
Baths
2,686 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.
0.15 ac
Lot SizeThe size of the land the home sits on, from county records.
1998
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
9
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
3
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$2.9M
$2.6M low$3.1M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$536,000 · Jan 9, 1998

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$10,744 (2025)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$865,766 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$262,041
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$610,725
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$848,655
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$2,211,660

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyALAMEDA
Lot (acres)The size of the land the home sits on, from county records.0.15
ConstructionThe main material the home's frame and walls are built from.Wood (Unspecified)
PoolWhether the property has a pool, and what kind, such as in-ground.No

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.

M
William Hopkins Middle SchoolA+
Middle · Grades 6–8 · 0.4 mi
H
Mission San Jose High SchoolA+
High · Grades 9–12 · 0.5 mi
E
Joshua Chadbourne Elementary SchoolA+
Elementary · Grades KG–5 · 0.6 mi

District: Fremont Unified School District

Neighborhood · ZIP 94539These 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.25
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.87
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.683

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.96%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.34%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.5%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.4%
PopulationHow many people live in this area.52,775
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,599 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$190,911
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$222,193
Average tempThe average temperature here across a full year.59°F
Annual precipHow much rain and melted snow falls here in a typical year.19 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.78%

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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

171 Castro Ln 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.

  • Worth more than 98% of homes in Alameda County
  • Costs more per square foot than 95% of homes in Alameda County
  • Bigger than 88% of homes in Alameda County
  • Has a smaller lot than 68% of homes in Fremont 94539
  • Newer than 86% of homes in Alameda County

What homes are worth in Fremont 94539

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

This home
$585K$4.4M

This home is worth more than 79% of homes in Fremont 94539.

How it measures up in Fremont 94539

The dot is this home. The mark in the middle is the typical home in Fremont 94539.

Estimated value$2,870,273
CheaperTypical $2,117,167Pricier

Pricier than 79% of homes nearby

Price per ft²$1069
CheaperTypical $998Pricier

Pricier than 64% of homes nearby

Living area2,686 ft²
SmallerTypical 2,029 ft²Bigger

Bigger than 75% of homes nearby

Lot size0.15 ac
SmallerTypical 0.18 acBigger

Bigger than 32% of homes nearby

Year built1998
OlderTypical 1979Newer

Newer than 80% of homes nearby

How 171 Castro Ln ranks against every home in each area.
MeasureThis homeMission ValleyFremont 94539Alameda County
Estimated valuepricier than$2,870,27376% of homes79% of homes98% of homes
Price per ft²pricier than$106932% of homes64% of homes95% of homes
Living areabigger than2,686 ft²76% of homes75% of homes88% of homes
Lot sizebigger than0.15 ac34% of homes32% of homes58% of homes
Year builtnewer than199882% of homes80% of homes86% of homes

About 171 Castro Ln

How much is 171 Castro Ln, Fremont, CA worth?

The TopHap Estimate for 171 Castro Ln, Fremont, CA is $2,870,273 as of Sep 24, 2026. The likely range is $2,599,678 to $3,140,868. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 171 Castro Ln, Fremont, CA last sell?

171 Castro Ln, Fremont, CA last sold on Jan 9, 1998 for $536,000, according to the county's recorded deed.

How big is 171 Castro Ln, Fremont, CA?

171 Castro Ln, Fremont, CA has 4 bedrooms, 3 bathrooms, 2,686 square feet of living space and a 0.15-acre lot.

When was 171 Castro Ln, Fremont, CA built?

171 Castro Ln, Fremont, CA was built in 1998, making it 28 years old. The building has 2 stories.

What schools serve 171 Castro Ln, Fremont, CA?

171 Castro Ln, Fremont, CA is assigned to William Hopkins Middle School (middle), rated A+; Mission San Jose High School (high), rated A+; Joshua Chadbourne Elementary School (elementary), rated A+. All sit in Fremont Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 171 Castro Ln, Fremont, CA compare to other homes in Fremont 94539?

Among the 17,344 homes in Fremont 94539, it is worth more than 79% of them ($2,870,273 against a typical $2,117,167), its price per square foot is higher than 64% of them ($1069 against a typical $998), it is bigger than 75% of them (2,686 ft² against a typical 2,029 ft²), its lot is bigger than 32% of them (0.15 ac against a typical 0.18 ac) and it is newer than 80% of them (1998 against a typical 1979). Measured against all of Alameda County, it is worth more than 98% 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 171 Castro Ln, Fremont, CA?

The 2025 property tax bill for 171 Castro Ln, Fremont, CA was $10,744. The county assessed it at $865,766.

More homes on Castro Ln

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Assigned schools

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