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Single Family ResidenceResidential
$1,258,979$832 / 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 Aug 30, 2026
Last sold for $353,000 on Apr 26, 2012

3821 COSMIC PL

FREMONT, CA 94538
4
Beds
2
Baths
1,514 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.
0.14 ac
Lot SizeThe size of the land the home sits on, from county records.
1979
Year BuiltThe year the home was originally built, according to county records.

Valuation

$1.3M
$1.2M low$1.3M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$353,000 · Apr 26, 2012

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,980 (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.$452,228 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$144,764
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$307,464
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$443,363
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,004,490

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.14 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.6%
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.minimal

Scores 0–100; higher = greater projected risk.

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.1980
Lot (acres)The size of the land the home sits on, from county records.0.14
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.Tile
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
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.Garage, Attached
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(6)

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
J. Haley Durham Elementary SchoolA
Elementary · Grades KG–5 · 0.2 mi
M
G. M. Walters Middle SchoolA
Middle · Grades 6–8 · 0.9 mi
H
Kennedy High SchoolB+
High · Grades 9–12 · 1.1 mi

District: Fremont Unified School District

Neighborhood · ZIP 94538These 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.65
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 100.620

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.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.31%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.5.3%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.6%
PopulationHow many people live in this area.67,745
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,952 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$137,410
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$160,880
Average tempThe average temperature here across a full year.59°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.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

3821 Cosmic Pl 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 80% of homes in Central / Downtown
  • Costs more per square foot than 77% of homes in Alameda County
  • Bigger than 76% of homes in Central / Downtown
  • Has a smaller lot than 70% of homes in Central / Downtown
  • Older than 69% of homes in Central / Downtown

What homes are worth in Fremont 94538

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

This home
$457K$1.9M

This home is worth more than 53% of homes in Fremont 94538.

How it measures up in Fremont 94538

The dot is this home. The mark in the middle is the typical home in Fremont 94538.

Estimated value$1,258,979
CheaperTypical $1,242,566Pricier

Pricier than 53% of homes nearby

Price per ft²$832
CheaperTypical $865Pricier

Pricier than 45% of homes nearby

Living area1,514 ft²
SmallerTypical 1,380 ft²Bigger

Bigger than 63% of homes nearby

Lot size0.14 ac
SmallerTypical 0.14 acBigger

Bigger than 34% of homes nearby

Year built1979
OlderTypical 1963Newer

Newer than 64% of homes nearby

How 3821 Cosmic Pl ranks against every home in each area.
MeasureThis homeCentral / DowntownFremont 94538Alameda County
Estimated valuepricier than$1,258,97980% of homes53% of homes63% of homes
Price per ft²pricier than$83273% of homes45% of homes77% of homes
Living areabigger than1,514 ft²76% of homes63% of homes47% of homes
Lot sizebigger than0.14 ac30% of homes34% of homes49% of homes
Year builtnewer than197931% of homes64% of homes68% of homes

About 3821 Cosmic Pl

How much is 3821 Cosmic Pl, Fremont, CA worth?

The TopHap Estimate for 3821 Cosmic Pl, Fremont, CA is $1,258,979 as of Aug 30, 2026. The likely range is $1,201,239 to $1,316,719. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 3821 Cosmic Pl, Fremont, CA last sell?

3821 Cosmic Pl, Fremont, CA last sold on Apr 26, 2012 for $353,000, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 3821 Cosmic Pl, Fremont, CA?

3821 Cosmic Pl, Fremont, CA has 4 bedrooms, 2 bathrooms, 1,514 square feet of living space and a 0.14-acre lot.

When was 3821 Cosmic Pl, Fremont, CA built?

3821 Cosmic Pl, Fremont, CA was built in 1979, making it 47 years old.

What schools serve 3821 Cosmic Pl, Fremont, CA?

3821 Cosmic Pl, Fremont, CA is assigned to J. Haley Durham Elementary School (elementary), rated A; G. M. Walters Middle School (middle), rated A; Kennedy High School (high), rated B+. All sit in Fremont Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 3821 Cosmic Pl, Fremont, CA compare to other homes in Fremont 94538?

Among the 15,977 homes in Fremont 94538, it is worth more than 53% of them ($1,258,979 against a typical $1,242,566), its price per square foot is higher than 45% of them ($832 against a typical $865), it is bigger than 63% of them (1,514 ft² against a typical 1,380 ft²), its lot is bigger than 34% of them (0.14 ac against a typical 0.14 ac) and it is newer than 64% of them (1979 against a typical 1963). Measured against all of Alameda County, it is worth more than 63% 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 3821 Cosmic Pl, Fremont, CA?

The 2025 property tax bill for 3821 Cosmic Pl, Fremont, CA was $5,980. The county assessed it at $452,228.

More homes on Cosmic Pl

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