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Single Family ResidenceResidential
$4,198,494$1,112 / 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 $3,260,000 on Sep 6, 2022

21 KING AVE

PIEDMONT, CA 94611
5
Beds
3
Baths
3,774 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.
0.17 ac
Lot SizeThe size of the land the home sits on, from county records.
1925
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
8
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$4.2M
$4M low$4.4M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$3,260,000 · Sep 6, 2022

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$47,112 (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.$3,459,511 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$1,037,853
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$2,421,658
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$3,391,703
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$2,881,080

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.1929
Lot (acres)The size of the land the home sits on, from county records.0.17
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.No

Transaction History(6)

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
Piedmont Middle SchoolA+
Middle · Grades 6–8 · 0.5 mi
H
Piedmont High SchoolA+
High · Grades 9–12 · 0.5 mi
E
Frank C. Havens Elementary SchoolA+
Elementary · Grades KG–5 · 0.6 mi

District: Piedmont City Unified School District

Neighborhood · ZIP 94611These 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.91
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.84
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.584

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.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.37%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.6.4%
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.39,965
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.5,185 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$165,259
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$221,766
Average tempThe average temperature here across a full year.57°F
Annual precipHow much rain and melted snow falls here in a typical year.26 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

21 King 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.

  • Among the most valuable homes in Alameda County
  • Costs more per square foot than 96% of homes in Alameda County
  • Bigger than 96% of homes in Alameda County
  • Has a bigger lot than 67% of homes in Alameda County
  • Older than 83% of homes in Alameda County

What homes are worth in Oakland 94611

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

This home
$290K$4.8M

This home is worth more than 97% of homes in Oakland 94611.

How it measures up in Oakland 94611

The dot is this home. The mark in the middle is the typical home in Oakland 94611.

Estimated value$4,198,494
CheaperTypical $1,493,102Pricier

Pricier than 97% of homes nearby

Price per ft²$1112
CheaperTypical $753Pricier

Pricier than 90% of homes nearby

Living area3,774 ft²
SmallerTypical 2,076 ft²Bigger

Bigger than 91% of homes nearby

Lot size0.17 ac
SmallerTypical 0.17 acBigger

Bigger than 49% of homes nearby

Year built1925
OlderTypical 1953Newer

Newer than 23% of homes nearby

How 21 King Ave ranks against every home in each area.
MeasureThis homeOakland 94611Alameda County
Estimated valuepricier than$4,198,49497% of homesalmost all homes
Price per ft²pricier than$111290% of homes96% of homes
Living areabigger than3,774 ft²91% of homes96% of homes
Lot sizebigger than0.17 ac49% of homes67% of homes
Year builtnewer than192523% of homes17% of homes

About 21 King Ave

How much is 21 King Ave, Piedmont, CA worth?

The TopHap Estimate for 21 King Ave, Piedmont, CA is $4,198,494 as of Sep 24, 2026. The likely range is $3,951,490 to $4,445,498. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 King Ave, Piedmont, CA last sell?

21 King Ave, Piedmont, CA last sold on Sep 6, 2022 for $3,260,000, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 21 King Ave, Piedmont, CA?

21 King Ave, Piedmont, CA has 5 bedrooms, 3 bathrooms, 3,774 square feet of living space and a 0.17-acre lot.

When was 21 King Ave, Piedmont, CA built?

21 King Ave, Piedmont, CA was built in 1925, making it 101 years old. The building has 2 stories.

What schools serve 21 King Ave, Piedmont, CA?

21 King Ave, Piedmont, CA is assigned to Piedmont Middle School (middle), rated A+; Piedmont High School (high), rated A+; Frank C. Havens Elementary School (elementary), rated A+. All sit in Piedmont City Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 King Ave, Piedmont, CA compare to other homes in Oakland 94611?

Among the 12,694 homes in Oakland 94611, it is worth more than 97% of them ($4,198,494 against a typical $1,493,102), its price per square foot is higher than 90% of them ($1112 against a typical $753), it is bigger than 91% of them (3,774 ft² against a typical 2,076 ft²), its lot is bigger than 49% of them (0.17 ac against a typical 0.17 ac) and it is newer than 23% of them (1925 against a typical 1953). Measured against all of Alameda County, it is worth more than almost all 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 21 King Ave, Piedmont, CA?

The 2025 property tax bill for 21 King Ave, Piedmont, CA was $47,112. The county assessed it at $3,459,511.

More homes on King Ave

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