Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$855,541$681 / 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 Sep 24, 2026
Last sold for $390,000 on May 28, 2010

521 SUPERIOR AVE

SAN LEANDRO, CA 94577
2
Beds
1
Baths
1,257 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.
0.12 ac
Lot SizeThe size of the land the home sits on, from county records.
1927
Year BuiltThe year the home was originally built, according to county records.
1
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

$856K
$808K low$903K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$390,000 · May 28, 2010

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,134 (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.$506,450 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$154,035
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$359,415
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$496,384
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$825,120

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.0.12
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(5)

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
Roosevelt Elementary SchoolA-
Elementary · Grades KG–5 · 0.2 mi
M
Bancroft Middle SchoolD+
Middle · Grades 6–8 · 0.6 mi
H
San Leandro High SchoolC
High · Grades 9–12 · 1.3 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%

Owner Tools

Do you own this home?
Claim this home

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 Superior 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.

  • Costs more per square foot than 87% of homes in San Leandro 94577
  • Smaller than 70% of homes in Alameda County
  • Older than 85% 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
$414K$1.4M

This home is worth more than 63% 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$855,541
CheaperTypical $783,109Pricier

Pricier than 63% of homes nearby

Price per ft²$681
CheaperTypical $554Pricier

Pricier than 87% of homes nearby

Living area1,257 ft²
SmallerTypical 1,423 ft²Bigger

Bigger than 37% of homes nearby

Lot size0.12 ac
SmallerTypical 0.13 acBigger

Bigger than 42% of homes nearby

Year built1927
OlderTypical 1946Newer

Newer than 15% of homes nearby

How 521 Superior Ave ranks against every home in each area.
MeasureThis homeNorth AreaSan Leandro 94577Alameda County
Estimated valuepricier than$855,54161% of homes63% of homes36% of homes
Price per ft²pricier than$68186% of homes87% of homes55% of homes
Living areabigger than1,257 ft²35% of homes37% of homes30% of homes
Lot sizebigger than0.12 ac57% of homes42% of homes37% of homes
Year builtnewer than192738% of homes15% of homes19% of homes

About 521 Superior Ave

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

The TopHap Estimate for 521 Superior Ave, San Leandro, CA is $855,541 as of Sep 24, 2026. The likely range is $808,325 to $902,757. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

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

521 Superior Ave, San Leandro, CA last sold on May 28, 2010 for $390,000, according to the county's recorded deed.

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

521 Superior Ave, San Leandro, CA has 2 bedrooms, 1 bathrooms, 1,257 square feet of living space and a 0.12-acre lot.

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

521 Superior Ave, San Leandro, CA was built in 1927, making it 99 years old. The building has 1 story.

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

521 Superior Ave, San Leandro, CA is assigned to Roosevelt Elementary School (elementary), rated A-; Bancroft Middle School (middle), rated D+; San Leandro High School (high), 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 Superior Ave, San Leandro, CA compare to other homes in San Leandro 94577?

Among the 12,259 homes in San Leandro 94577, it is worth more than 63% of them ($855,541 against a typical $783,109), its price per square foot is higher than 87% of them ($681 against a typical $554), it is bigger than 37% of them (1,257 ft² against a typical 1,423 ft²), its lot is bigger than 42% of them (0.12 ac against a typical 0.13 ac) and it is newer than 15% of them (1927 against a typical 1946). Measured against all of Alameda County, it is worth more than 36% 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 Superior Ave, San Leandro, CA?

The 2025 property tax bill for 521 Superior Ave, San Leandro, CA was $7,134. The county assessed it at $506,450.

More homes on Superior Ave

Closest homes

More homes in San Leandro 94577

Assigned schools

Explore the area

See this home in context

Open 521 Superior Ave on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map