Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$905,423$448 / 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 93How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Jul 14, 2026
Last sold for $390,000 on Nov 30, 2012

16840 ROBEY DR

CASTRO VALLEY, CA 94578
3
Beds
2
Baths
2,021 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.
4,275 ft²
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.
6
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$905K
$845K low$966K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$390,000 · Nov 30, 2012
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$760,971
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$608,777
Loan-to-ValueHow much is still owed on the home compared to what it is worth. 80% means loans equal 80% of our estimate, so it shifts when the estimate does.15%
1st MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$144,452
Null Placeholder · 6% · recorded Apr 16, 2026

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,782 (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.$420,040 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$128,112
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$298,928
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$411,668
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$974,430

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.1974
Lot (acres)The size of the land the home sits on, from county records.0.10
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(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.

Foreclosure Filings(1)

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

M
Edendale Middle SchoolF
Middle · Grades 6–8 · 0.9 mi
H
San Lorenzo High SchoolC-
High · Grades 9–12 · 1.3 mi
E
Corvallis Elementary SchoolC
Elementary · Grades KG–5 · 2.8 mi

District: San Lorenzo Unified School District

Neighborhood · ZIP 94578These 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.96
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 100.654

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.21%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.13%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.3%
PopulationHow many people live in this area.36,127
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.9,333 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$79,481
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$101,965
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%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Owner occupied
Company ownedWhether the owner is a company or trust rather than a person.No

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

16840 Robey 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 85% of homes in San Leandro 94578
  • Costs less per square foot than 95% of homes in Castro Valley
  • Bigger than 87% of homes in San Leandro 94578
  • Has a smaller lot than 91% of homes in Castro Valley
  • Newer than 77% of homes in San Leandro 94578

What homes are worth in San Leandro 94578

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

This home
$366K$1.1M

This home is worth more than 85% of homes in San Leandro 94578.

How it measures up in San Leandro 94578

The dot is this home. The mark in the middle is the typical home in San Leandro 94578.

Estimated value$905,423
CheaperTypical $742,724Pricier

Pricier than 85% of homes nearby

Price per ft²$448
CheaperTypical $551Pricier

Pricier than 16% of homes nearby

Living area2,021 ft²
SmallerTypical 1,342 ft²Bigger

Bigger than 87% of homes nearby

Lot size4,275 ft²
SmallerTypical 0.13 acBigger

Bigger than 14% of homes nearby

Year built1973
OlderTypical 1953Newer

Newer than 77% of homes nearby

How 16840 Robey Dr ranks against every home in each area.
MeasureThis homeCastro ValleySan Leandro 94578Alameda County
Estimated valuepricier than$905,42331% of homes85% of homes40% of homes
Price per ft²pricier than$4485% of homes16% of homes10% of homes
Living areabigger than2,021 ft²66% of homes87% of homes72% of homes
Lot sizebigger than4,275 ft²9% of homes14% of homes23% of homes
Year builtnewer than197365% of homes77% of homes63% of homes

About 16840 Robey Dr

How much is 16840 Robey Dr, Castro Valley, CA worth?

The TopHap Estimate for 16840 Robey Dr, Castro Valley, CA is $905,423 as of Jul 14, 2026. The likely range is $845,168 to $965,678. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 16840 Robey Dr, Castro Valley, CA last sell?

16840 Robey Dr, Castro Valley, CA last sold on Nov 30, 2012 for $390,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 16840 Robey Dr, Castro Valley, CA?

16840 Robey Dr, Castro Valley, CA has 3 bedrooms, 2 bathrooms, 2,021 square feet of living space and a 0.10-acre lot.

When was 16840 Robey Dr, Castro Valley, CA built?

16840 Robey Dr, Castro Valley, CA was built in 1973, making it 53 years old.

What schools serve 16840 Robey Dr, Castro Valley, CA?

16840 Robey Dr, Castro Valley, CA is assigned to Edendale Middle School (middle), rated F; San Lorenzo High School (high), rated C-; Corvallis Elementary School (elementary), rated C. All sit in San Lorenzo Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 16840 Robey Dr, Castro Valley, CA compare to other homes in San Leandro 94578?

Among the 7,940 homes in San Leandro 94578, it is worth more than 85% of them ($905,423 against a typical $742,724), its price per square foot is higher than 16% of them ($448 against a typical $551), it is bigger than 87% of them (2,021 ft² against a typical 1,342 ft²), its lot is bigger than 14% of them (4,275 ft² against a typical 0.13 ac) and it is newer than 77% of them (1973 against a typical 1953). Measured against all of Alameda County, it is worth more than 40% 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 16840 Robey Dr, Castro Valley, CA?

The 2025 property tax bill for 16840 Robey Dr, Castro Valley, CA was $5,782. The county assessed it at $420,040.

Closest homes

More homes in Castro Valley 94578

Assigned schools

Explore the area

See this home in context

Open 16840 Robey Dr 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