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Single Family ResidenceResidential
$1,079,582$785 / 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 86How 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 $1,105,000 on Jan 6, 2025

646 CEDAR DR

LIVERMORE, CA 94551
3
Beds
2
Baths
1,376 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.
1969
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

$1.1M
$931K low$1.2M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$1,105,000 · Jan 6, 2025

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,493 (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.$1,120,100 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$338,130
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$788,970
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$291,588
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$947,520

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.7 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.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
StyleThe architectural style of the home, such as ranch or colonial.Custom Design
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)
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
CoolingThe type of cooling or air conditioning in the home.Central
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(3)

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
Rancho Las Positas Elementary SchoolA-
Elementary · Grades KG–5 · 0.3 mi
H
Granada High SchoolA
High · Grades 9–12 · 0.8 mi
M
Junction Avenue TK-8 SchoolC
Middle · Grades KG–8 · 1.4 mi

District: Livermore Valley Joint Unified School District

Neighborhood · ZIP 94551These 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.60
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.85
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.382

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.32%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.5.3%
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.47,124
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.555 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$145,402
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$169,089
Average tempThe average temperature here across a full year.59°F
Annual precipHow much rain and melted snow falls here in a typical year.17 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

646 Cedar Dr 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 67% of homes in Livermore 94551
  • Costs more per square foot than 87% of homes in Livermore 94551
  • Has a smaller lot than 72% of homes in Summerset
  • Older than 70% of homes in Livermore 94551

What homes are worth in Livermore 94551

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

This home
$598K$1.8M

This home is worth more than 67% of homes in Livermore 94551.

How it measures up in Livermore 94551

The dot is this home. The mark in the middle is the typical home in Livermore 94551.

Estimated value$1,079,582
CheaperTypical $974,360Pricier

Pricier than 67% of homes nearby

Price per ft²$785
CheaperTypical $648Pricier

Pricier than 87% of homes nearby

Living area1,376 ft²
SmallerTypical 1,514 ft²Bigger

Bigger than 38% of homes nearby

Lot size0.14 ac
SmallerTypical 0.15 acBigger

Bigger than 39% of homes nearby

Year built1969
OlderTypical 1985Newer

Newer than 30% of homes nearby

How 646 Cedar Dr ranks against every home in each area.
MeasureThis homeSummersetLivermore 94551Alameda County
Estimated valuepricier than$1,079,58254% of homes67% of homes52% of homes
Price per ft²pricier than$78581% of homes87% of homes72% of homes
Living areabigger than1,376 ft²40% of homes38% of homes38% of homes
Lot sizebigger than0.14 ac28% of homes39% of homes54% of homes
Year builtnewer than196937% of homes30% of homes56% of homes

About 646 Cedar Dr

How much is 646 Cedar Dr, Livermore, CA worth?

The TopHap Estimate for 646 Cedar Dr, Livermore, CA is $1,079,582 as of Sep 24, 2026. The likely range is $931,472 to $1,227,692. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 646 Cedar Dr, Livermore, CA last sell?

646 Cedar Dr, Livermore, CA last sold on Jan 6, 2025 for $1,105,000, according to the county's recorded deed.

How big is 646 Cedar Dr, Livermore, CA?

646 Cedar Dr, Livermore, CA has 3 bedrooms, 2 bathrooms, 1,376 square feet of living space and a 0.14-acre lot.

When was 646 Cedar Dr, Livermore, CA built?

646 Cedar Dr, Livermore, CA was built in 1969, making it 57 years old. It is a custom design home. The building has 1 story.

What schools serve 646 Cedar Dr, Livermore, CA?

646 Cedar Dr, Livermore, CA is assigned to Rancho Las Positas Elementary School (elementary), rated A-; Granada High School (high), rated A; Junction Avenue TK-8 School (middle), rated C. All sit in Livermore Valley Joint Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 646 Cedar Dr, Livermore, CA compare to other homes in Livermore 94551?

Among the 12,855 homes in Livermore 94551, it is worth more than 67% of them ($1,079,582 against a typical $974,360), its price per square foot is higher than 87% of them ($785 against a typical $648), it is bigger than 38% of them (1,376 ft² against a typical 1,514 ft²), its lot is bigger than 39% of them (0.14 ac against a typical 0.15 ac) and it is newer than 30% of them (1969 against a typical 1985). Measured against all of Alameda County, it is worth more than 52% 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 646 Cedar Dr, Livermore, CA?

The 2025 property tax bill for 646 Cedar Dr, Livermore, CA was $4,493. The county assessed it at $1,120,100.

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