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Single Family ResidenceResidential
$644,344$644 / 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 Aug 30, 2026

27870 BISCAYNE AVE

HAYWARD, CA 94544
3
Beds
2
Baths
1,000 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.
0.11 ac
Lot SizeThe size of the land the home sits on, from county records.
1954
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.

Valuation

$644K
$589K low$700K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,153 (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.$154,265 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$81,782
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$72,483
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$151,240
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$591,840

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.1 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.0.2 percent flood zone

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
StyleThe architectural style of the home, such as ranch or colonial.Custom Design
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.1955
Lot (acres)The size of the land the home sits on, from county records.0.12
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(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
Ruus Elementary SchoolC
Elementary · Grades KG–6 · 0.1 mi
M
Cesar Chavez Middle SchoolD
Middle · Grades 7–8 · 0.8 mi
H
Tennyson High SchoolD+
High · Grades 9–12 · 1.0 mi

District: Hayward Unified School District

Neighborhood · ZIP 94544These 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.74
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 100.615

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.20%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.9.7%
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.78,842
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.6,902 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$95,392
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$122,897
Average tempThe average temperature here across a full year.58°F
Annual precipHow much rain and melted snow falls here in a typical year.20 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

27870 Biscayne Ave 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 less than 81% of homes in Tennyson-Alquire
  • Costs more per square foot than 75% of homes in Tennyson-Alquire
  • Smaller than 88% of homes in Alameda County
  • Has a smaller lot than 84% of homes in Hayward 94544
  • Older than 73% of homes in Tennyson-Alquire

What homes are worth in Hayward 94544

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

This home
$401K$1.7M

This home is worth more than 21% of homes in Hayward 94544.

How it measures up in Hayward 94544

The dot is this home. The mark in the middle is the typical home in Hayward 94544.

Estimated value$644,344
CheaperTypical $773,022Pricier

Pricier than 21% of homes nearby

Price per ft²$644
CheaperTypical $584Pricier

Pricier than 75% of homes nearby

Living area1,000 ft²
SmallerTypical 1,329 ft²Bigger

Bigger than 16% of homes nearby

Lot size0.11 ac
SmallerTypical 0.13 acBigger

Bigger than 16% of homes nearby

Year built1954
OlderTypical 1956Newer

Newer than 34% of homes nearby

How 27870 Biscayne Ave ranks against every home in each area.
MeasureThis homeTennyson-AlquireHayward 94544Alameda County
Estimated valuepricier than$644,34419% of homes21% of homes19% of homes
Price per ft²pricier than$64475% of homes75% of homes47% of homes
Living areabigger than1,000 ft²19% of homes16% of homes12% of homes
Lot sizebigger than0.11 ac32% of homes16% of homes29% of homes
Year builtnewer than195427% of homes34% of homes37% of homes

About 27870 Biscayne Ave

How much is 27870 Biscayne Ave, Hayward, CA worth?

The TopHap Estimate for 27870 Biscayne Ave, Hayward, CA is $644,344 as of Aug 30, 2026. The likely range is $588,956 to $699,732. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 27870 Biscayne Ave, Hayward, CA last sell?

27870 Biscayne Ave, Hayward, CA last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 27870 Biscayne Ave, Hayward, CA?

27870 Biscayne Ave, Hayward, CA has 3 bedrooms, 2 bathrooms, 1,000 square feet of living space and a 0.12-acre lot.

When was 27870 Biscayne Ave, Hayward, CA built?

27870 Biscayne Ave, Hayward, CA was built in 1954, making it 72 years old. It is a custom design home. The building has 1 story.

What schools serve 27870 Biscayne Ave, Hayward, CA?

27870 Biscayne Ave, Hayward, CA is assigned to Ruus Elementary School (elementary), rated C; Cesar Chavez Middle School (middle), rated D; Tennyson High School (high), rated D+. All sit in Hayward Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 27870 Biscayne Ave, Hayward, CA compare to other homes in Hayward 94544?

Among the 15,610 homes in Hayward 94544, it is worth more than 21% of them ($644,344 against a typical $773,022), its price per square foot is higher than 75% of them ($644 against a typical $584), it is bigger than 16% of them (1,000 ft² against a typical 1,329 ft²), its lot is bigger than 16% of them (0.11 ac against a typical 0.13 ac) and it is newer than 34% of them (1954 against a typical 1956). Measured against all of Alameda County, it is worth more than 19% 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 27870 Biscayne Ave, Hayward, CA?

The 2025 property tax bill for 27870 Biscayne Ave, Hayward, CA was $2,153. The county assessed it at $154,265.

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Assigned schools

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