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Single Family ResidenceResidential
$2,675,161$843 / 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 94How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026

421 CRYSTALLINE DR

FREMONT, CA 94539
4
Beds
3.5
Baths
3,172 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.
0.46 ac
Lot SizeThe size of the land the home sits on, from county records.
1985
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

$2.7M
$2.5M low$2.8M high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$8,046 (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.$631,283 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$188,494
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$449,789
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$618,771
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$2,710,710

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyALAMEDA
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.1992
Lot (acres)The size of the land the home sits on, from county records.0.46
ConstructionThe main material the home's frame and walls are built from.Wood (Unspecified)
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
CoolingThe type of cooling or air conditioning in the home.Central
FireplaceWhether the home has a fireplace, and what kind.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.No
ViewThe type of view from the property, or another feature of the site that affects value.Bay

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.

E
Fred E. Weibel Elementary SchoolA+
Elementary · Grades KG–5 · 0.4 mi
H
Irvington High SchoolA+
High · Grades 9–12 · 2.8 mi
M
John M. Horner Middle SchoolA
Middle · Grades 6–8 · 2.9 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

421 Crystalline Dr 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 97% of homes in Alameda County
  • Costs less per square foot than 90% of homes in Weibel
  • Bigger than 96% of homes in Weibel
  • Has a bigger lot than 96% of homes in Weibel
  • Newer than 90% of homes in Weibel

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
$579K$4.2M

This home is worth more than 74% 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$2,675,161
CheaperTypical $2,083,504Pricier

Pricier than 74% of homes nearby

Price per ft²$843
CheaperTypical $980Pricier

Pricier than 27% of homes nearby

Living area3,172 ft²
SmallerTypical 2,029 ft²Bigger

Bigger than 86% of homes nearby

Lot size0.46 ac
SmallerTypical 0.18 acBigger

Bigger than 86% of homes nearby

Year built1985
OlderTypical 1979Newer

Newer than 58% of homes nearby

How 421 Crystalline Dr ranks against every home in each area.
MeasureThis homeWeibelFremont 94539Alameda County
Estimated valuepricier than$2,675,16195% of homes74% of homes97% of homes
Price per ft²pricier than$84310% of homes27% of homes79% of homes
Living areabigger than3,172 ft²96% of homes86% of homes93% of homes
Lot sizebigger than0.46 ac96% of homes86% of homes89% of homes
Year builtnewer than198590% of homes58% of homes73% of homes

About 421 Crystalline Dr

How much is 421 Crystalline Dr, Fremont, CA worth?

The TopHap Estimate for 421 Crystalline Dr, Fremont, CA is $2,675,161 as of Aug 30, 2026. The likely range is $2,513,435 to $2,836,887. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 421 Crystalline Dr, Fremont, CA last sell?

421 Crystalline Dr, Fremont, CA last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 421 Crystalline Dr, Fremont, CA?

421 Crystalline Dr, Fremont, CA has 4 bedrooms, 3.5 bathrooms, 3,172 square feet of living space and a 0.46-acre lot.

When was 421 Crystalline Dr, Fremont, CA built?

421 Crystalline Dr, Fremont, CA was built in 1985, making it 41 years old. The building has 2 stories.

What schools serve 421 Crystalline Dr, Fremont, CA?

421 Crystalline Dr, Fremont, CA is assigned to Fred E. Weibel Elementary School (elementary), rated A+; Irvington High School (high), rated A+; John M. Horner Middle School (middle), rated A. All sit in Fremont Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 421 Crystalline Dr, Fremont, CA compare to other homes in Fremont 94539?

Among the 17,322 homes in Fremont 94539, it is worth more than 74% of them ($2,675,161 against a typical $2,083,504), its price per square foot is higher than 27% of them ($843 against a typical $980), it is bigger than 86% of them (3,172 ft² against a typical 2,029 ft²), its lot is bigger than 86% of them (0.46 ac against a typical 0.18 ac) and it is newer than 58% of them (1985 against a typical 1979). Measured against all of Alameda County, it is worth more than 97% 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 421 Crystalline Dr, Fremont, CA?

The 2025 property tax bill for 421 Crystalline Dr, Fremont, CA was $8,046. The county assessed it at $631,283.

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