Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$886,788$395 / 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 Oct 21, 2026

400 WILLIAMS ST

SAN LEANDRO, CA 94577
3
Beds
2
Baths
2,246 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.
1953
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

$887K
$836K low$938K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,556 (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.$130,969 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$61,052
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$76,917
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$128,264
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$940,050

Climate Risk

Overall riskThe average of the five hazard scores below, on a 0 to 100 scale. Higher means greater projected risk over the coming decades.25
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
1
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
21
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
44
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
62
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
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
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)
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(1)

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
McKinley Elementary SchoolC
Elementary · Grades KG–5 · 0.5 mi
M
Bancroft Middle SchoolD+
Middle · Grades 6–8 · 0.8 mi
H
San Leandro High SchoolC
High · Grades 9–12 · 0.8 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

400 Williams St 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 79% of homes in Downtown San Leandro
  • Costs less per square foot than 95% of homes in Alameda County
  • Bigger than 90% of homes in Downtown San Leandro
  • Newer than 65% 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
$405K$1.4M

This home is worth more than 68% 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$886,788
CheaperTypical $783,125Pricier

Pricier than 68% of homes nearby

Price per ft²$395
CheaperTypical $554Pricier

Pricier than 7% of homes nearby

Living area2,246 ft²
SmallerTypical 1,424 ft²Bigger

Bigger than 87% of homes nearby

Lot size0.14 ac
SmallerTypical 0.13 acBigger

Bigger than 61% of homes nearby

Year built1953
OlderTypical 1946Newer

Newer than 65% of homes nearby

How 400 Williams St ranks against every home in each area.
MeasureThis homeDowntown San LeandroSan Leandro 94577Alameda County
Estimated valuepricier than$886,78879% of homes68% of homes39% of homes
Price per ft²pricier than$39527% of homes7% of homes5% of homes
Living areabigger than2,246 ft²90% of homes87% of homes79% of homes
Lot sizebigger than0.14 ac42% of homes61% of homes53% of homes
Year builtnewer than195350% of homes65% of homes36% of homes

About 400 Williams St

How much is 400 Williams St, San Leandro, CA worth?

The TopHap Estimate for 400 Williams St, San Leandro, CA is $886,788 as of Oct 21, 2026. The likely range is $835,576 to $938,000. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 400 Williams St, San Leandro, CA last sell?

400 Williams St, San Leandro, CA last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 400 Williams St, San Leandro, CA?

400 Williams St, San Leandro, CA has 3 bedrooms, 2 bathrooms, 2,246 square feet of living space and a 0.14-acre lot.

When was 400 Williams St, San Leandro, CA built?

400 Williams St, San Leandro, CA was built in 1953, making it 73 years old. The building has 2 stories.

What schools serve 400 Williams St, San Leandro, CA?

400 Williams St, San Leandro, CA is assigned to McKinley Elementary School (elementary), rated C; 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 400 Williams St, San Leandro, CA compare to other homes in San Leandro 94577?

Among the 12,260 homes in San Leandro 94577, it is worth more than 68% of them ($886,788 against a typical $783,125), its price per square foot is higher than 7% of them ($395 against a typical $554), it is bigger than 87% of them (2,246 ft² against a typical 1,424 ft²), its lot is bigger than 61% of them (0.14 ac against a typical 0.13 ac) and it is newer than 65% of them (1953 against a typical 1946). Measured against all of Alameda County, it is worth more than 39% 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 400 Williams St, San Leandro, CA?

The 2025 property tax bill for 400 Williams St, San Leandro, CA was $2,556. The county assessed it at $130,969.

More homes on Williams St

Closest homes

More homes in San Leandro 94577

Assigned schools

Explore the area

See this home in context

Open 400 Williams St 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