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Single Family ResidenceResidential
$602,527$555 / 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 92How 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

670 CROSBY PL

SAN LEANDRO, CA 94579
3
Beds
1
Baths
1,086 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.
0.39 ac
Lot SizeThe size of the land the home sits on, from county records.
1952
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

$603K
$555K low$650K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,188 (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.$294,352 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$128,779
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$165,573
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$288,581
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$700,020

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.18 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.34%
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.1 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
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.1953
Lot (acres)The size of the land the home sits on, from county records.0.39
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.

M
Washington Manor Middle SchoolC+
Middle · Grades 6–8 · 0.5 mi
E
Corvallis Elementary SchoolC
Elementary · Grades KG–5 · 0.6 mi
H
Arroyo High SchoolB+
High · Grades 9–12 · 0.9 mi

District: San Lorenzo Unified School District

Neighborhood · ZIP 94579These 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.55
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.90
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.555

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.98%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.23%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.8.6%
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.21,577
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.5,388 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$89,526
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$114,894
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

670 Crosby 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 less than 90% of homes in San Leandro 94579
  • Costs less per square foot than 72% of homes in Alameda County
  • Smaller than 84% of homes in San Leandro 94579
  • Has a bigger lot than 96% of homes in Washington Manor
  • Older than 65% of homes in Alameda County

What homes are worth in San Leandro 94579

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

This home
$455K$1.2M

This home is worth more than 10% of homes in San Leandro 94579.

How it measures up in San Leandro 94579

The dot is this home. The mark in the middle is the typical home in San Leandro 94579.

Estimated value$602,527
CheaperTypical $757,883Pricier

Pricier than 10% of homes nearby

Price per ft²$555
CheaperTypical $542Pricier

Pricier than 56% of homes nearby

Living area1,086 ft²
SmallerTypical 1,379 ft²Bigger

Bigger than 16% of homes nearby

Lot size0.39 ac
SmallerTypical 0.12 acBigger

Bigger than 94% of homes nearby

Year built1952
OlderTypical 1953Newer

Newer than 43% of homes nearby

How 670 Crosby Pl ranks against every home in each area.
MeasureThis homeWashington ManorSan Leandro 94579Alameda County
Estimated valuepricier than$602,52713% of homes10% of homes15% of homes
Price per ft²pricier than$55551% of homes56% of homes28% of homes
Living areabigger than1,086 ft²20% of homes16% of homes18% of homes
Lot sizebigger than0.39 ac96% of homes94% of homes88% of homes
Year builtnewer than195252% of homes43% of homes35% of homes

About 670 Crosby Pl

How much is 670 Crosby Pl, San Leandro, CA worth?

The TopHap Estimate for 670 Crosby Pl, San Leandro, CA is $602,527 as of Sep 24, 2026. The likely range is $554,948 to $650,106. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 670 Crosby Pl, San Leandro, CA last sell?

670 Crosby Pl, San Leandro, CA last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 670 Crosby Pl, San Leandro, CA?

670 Crosby Pl, San Leandro, CA has 3 bedrooms, 1 bathrooms, 1,086 square feet of living space and a 0.39-acre lot.

When was 670 Crosby Pl, San Leandro, CA built?

670 Crosby Pl, San Leandro, CA was built in 1952, making it 74 years old. The building has 1 story.

What schools serve 670 Crosby Pl, San Leandro, CA?

670 Crosby Pl, San Leandro, CA is assigned to Washington Manor Middle School (middle), rated C+; Corvallis Elementary School (elementary), rated C; Arroyo High School (high), rated B+. All sit in San Lorenzo Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 670 Crosby Pl, San Leandro, CA compare to other homes in San Leandro 94579?

Among the 6,156 homes in San Leandro 94579, it is worth more than 10% of them ($602,527 against a typical $757,883), its price per square foot is higher than 56% of them ($555 against a typical $542), it is bigger than 16% of them (1,086 ft² against a typical 1,379 ft²), its lot is bigger than 94% of them (0.39 ac against a typical 0.12 ac) and it is newer than 43% of them (1952 against a typical 1953). Measured against all of Alameda County, it is worth more than 15% 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 670 Crosby Pl, San Leandro, CA?

The 2025 property tax bill for 670 Crosby Pl, San Leandro, CA was $4,188. The county assessed it at $294,352.

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