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CondominiumResidential
$588,838$335 / 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 96How 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 $750,000 on Oct 7, 2021

521 SYBIL AVE

SAN LEANDRO, CA 94577
2
Beds
2
Baths
1,758 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.
0.29 ac
Lot SizeThe size of the land the home sits on, from county records.
1981
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
5
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$589K
$564K low$614K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$750,000 · Oct 7, 2021

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$8,675 (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.$554,329 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$220,500
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$514,500
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$620,602
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$717,390

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Condominium
CountyALAMEDA
Lot (acres)The size of the land the home sits on, from county records.0.29
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(7)

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

Foreclosure Filings(3)

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

E
McKinley Elementary SchoolC
Elementary · Grades KG–5 · 0.1 mi
H
San Leandro High SchoolC-
High · Grades 9–12 · 0.4 mi
M
Bancroft Middle SchoolC-
Middle · Grades 6–8 · 0.5 mi

District: San Leandro Unified School District

Neighborhood · ZIP 94577These 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.86
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.93
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.585

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.26%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.8.8%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.5%
PopulationHow many people live in this area.48,861
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.5,612 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$106,335
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$133,543
Average tempThe average temperature here across a full year.58°F
Annual precipHow much rain and melted snow falls here in a typical year.21 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

521 Sybil 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 86% of homes in San Leandro 94577
  • Among the lowest price per square foot in San Leandro 94577
  • Bigger than 79% of homes in Downtown San Leandro
  • Has a bigger lot than 87% of homes in San Leandro 94577
  • Newer than 86% of homes in San Leandro 94577

What homes are worth in San Leandro 94577

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

This home
$422K$1.4M

This home is worth more than 14% of homes in San Leandro 94577.

How it measures up in San Leandro 94577

The dot is this home. The mark in the middle is the typical home in San Leandro 94577.

Estimated value$588,838
CheaperTypical $785,753Pricier

Pricier than 14% of homes nearby

Price per ft²$335
CheaperTypical $553Pricier

Cheaper than almost all homes nearby

Living area1,758 ft²
SmallerTypical 1,420 ft²Bigger

Bigger than 71% of homes nearby

Lot size0.29 ac
SmallerTypical 0.13 acBigger

Bigger than 87% of homes nearby

Year built1981
OlderTypical 1946Newer

Newer than 86% of homes nearby

How 521 Sybil Ave ranks against every home in each area.
MeasureThis homeDowntown San LeandroSan Leandro 94577Alameda County
Estimated valuepricier than$588,83836% of homes14% of homes14% of homes
Price per ft²pricier than$3354% of homesalmost no homes2% of homes
Living areabigger than1,758 ft²79% of homes71% of homes61% of homes
Lot sizebigger than0.29 ac71% of homes87% of homes84% of homes
Year builtnewer than198179% of homes86% of homes69% of homes

About 521 Sybil Ave

How much is 521 Sybil Ave, San Leandro, CA worth?

The TopHap Estimate for 521 Sybil Ave, San Leandro, CA is $588,838 as of Sep 24, 2026. The likely range is $563,780 to $613,896. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 521 Sybil Ave, San Leandro, CA last sell?

521 Sybil Ave, San Leandro, CA last sold on Oct 7, 2021 for $750,000, according to the county's recorded deed. TopHap holds 5 recorded sales for this parcel.

How big is 521 Sybil Ave, San Leandro, CA?

521 Sybil Ave, San Leandro, CA has 2 bedrooms, 2 bathrooms, 1,758 square feet of living space and a 0.29-acre lot.

When was 521 Sybil Ave, San Leandro, CA built?

521 Sybil Ave, San Leandro, CA was built in 1981, making it 45 years old. The building has 2 stories.

What schools serve 521 Sybil Ave, San Leandro, CA?

521 Sybil Ave, San Leandro, CA is assigned to McKinley Elementary School (elementary), rated C; San Leandro High School (high), rated C-; Bancroft Middle School (middle), rated C-. All sit in San Leandro Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 521 Sybil Ave, San Leandro, CA compare to other homes in San Leandro 94577?

Among the 12,255 homes in San Leandro 94577, it is worth more than 14% of them ($588,838 against a typical $785,753), its price per square foot is higher than almost none of them ($335 against a typical $553), it is bigger than 71% of them (1,758 ft² against a typical 1,420 ft²), its lot is bigger than 87% of them (0.29 ac against a typical 0.13 ac) and it is newer than 86% of them (1981 against a typical 1946). Measured against all of Alameda County, it is worth more than 14% 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 521 Sybil Ave, San Leandro, CA?

The 2025 property tax bill for 521 Sybil Ave, San Leandro, CA was $8,675. The county assessed it at $554,329.

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