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CondominiumResidential
$881,232$569 / 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 95How 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
Last sold for $800,000 on Nov 24, 2020

509 WILLOW ST

ALAMEDA, CA 94501
2
Beds
2.5
Baths
1,550 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.
0.84 ac
Lot SizeThe size of the land the home sits on, from county records.
1973
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$881K
$834K low$928K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$800,000 · Nov 24, 2020

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$12,431 (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.$876,247 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$264,974
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$618,273
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$858,935
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$765,450

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.Condominium
CountyALAMEDA
Lot (acres)The size of the land the home sits on, from county records.0.84
ConstructionThe main material the home's frame and walls are built from.Wood (Unspecified)
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
FireplaceWhether the home has a fireplace, and what kind.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.Yes

Transaction History(10)

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
Wood Middle SchoolB
Middle · Grades 6–8 · 0.4 mi
H
Alameda High SchoolA+
High · Grades 9–12 · 0.5 mi
E
Franklin Elementary SchoolA
Elementary · Grades KG–5 · 0.7 mi

District: Alameda City Unified School District

Neighborhood · ZIP 94501These 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.124
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.88
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.409

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.93%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.35%
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.1.4%
PopulationHow many people live in this area.61,491
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.5,332 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$122,273
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$153,309
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

509 Willow 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 less than 76% of homes in Alameda 94501
  • Costs less per square foot than 86% of homes in Alameda 94501
  • Bigger than 72% of homes in South Shore
  • Has a bigger lot than 93% of homes in Alameda County
  • Newer than 84% of homes in South Shore

What homes are worth in Alameda 94501

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

This home
$406K$2.3M

This home is worth more than 24% of homes in Alameda 94501.

How it measures up in Alameda 94501

The dot is this home. The mark in the middle is the typical home in Alameda 94501.

Estimated value$881,232
CheaperTypical $1,148,244Pricier

Pricier than 24% of homes nearby

Price per ft²$569
CheaperTypical $732Pricier

Pricier than 14% of homes nearby

Living area1,550 ft²
SmallerTypical 1,651 ft²Bigger

Bigger than 45% of homes nearby

Lot size0.84 ac
SmallerTypical 0.11 acBigger

Bigger than 89% of homes nearby

Year built1973
OlderTypical 1933Newer

Newer than 82% of homes nearby

How 509 Willow St ranks against every home in each area.
MeasureThis homeSouth ShoreAlameda 94501Alameda County
Estimated valuepricier than$881,23244% of homes24% of homes38% of homes
Price per ft²pricier than$56922% of homes14% of homes30% of homes
Living areabigger than1,550 ft²72% of homes45% of homes49% of homes
Lot sizebigger than0.84 ac59% of homes89% of homes93% of homes
Year builtnewer than197384% of homes82% of homes62% of homes

About 509 Willow St

How much is 509 Willow St, Alameda, CA worth?

The TopHap Estimate for 509 Willow St, Alameda, CA is $881,232 as of Aug 30, 2026. The likely range is $834,376 to $928,088. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 509 Willow St, Alameda, CA last sell?

509 Willow St, Alameda, CA last sold on Nov 24, 2020 for $800,000, according to the county's recorded deed. TopHap holds 4 recorded sales for this parcel.

How big is 509 Willow St, Alameda, CA?

509 Willow St, Alameda, CA has 2 bedrooms, 2.5 bathrooms, 1,550 square feet of living space and a 0.84-acre lot.

When was 509 Willow St, Alameda, CA built?

509 Willow St, Alameda, CA was built in 1973, making it 53 years old. The building has 2 stories.

What schools serve 509 Willow St, Alameda, CA?

509 Willow St, Alameda, CA is assigned to Wood Middle School (middle), rated B; Alameda High School (high), rated A+; Franklin Elementary School (elementary), rated A. All sit in Alameda City Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 509 Willow St, Alameda, CA compare to other homes in Alameda 94501?

Among the 14,787 homes in Alameda 94501, it is worth more than 24% of them ($881,232 against a typical $1,148,244), its price per square foot is higher than 14% of them ($569 against a typical $732), it is bigger than 45% of them (1,550 ft² against a typical 1,651 ft²), its lot is bigger than 89% of them (0.84 ac against a typical 0.11 ac) and it is newer than 82% of them (1973 against a typical 1933). Measured against all of Alameda County, it is worth more than 38% 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 509 Willow St, Alameda, CA?

The 2025 property tax bill for 509 Willow St, Alameda, CA was $12,431. The county assessed it at $876,247.

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