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Single Family ResidenceResidential
$9,999,999$1,785 / 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 95How 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
Last sold for $11,850,000 on May 21, 2018

27 ADAM WAY

ATHERTON, CA 94027
5
Beds
6.5
Baths
5,603 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.
0.94 ac
Lot SizeThe size of the land the home sits on, from county records.
1990
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
12
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

$10M
$10M low$10M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$11,850,000 · May 21, 2018

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$148,776 (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.$13,752,938 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$9,627,058
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$4,125,880
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$13,483,274

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountySAN MATEO
Lot (acres)The size of the land the home sits on, from county records.0.94
HeatingThe type of heating system in the home.Central
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.No

Transaction History(8)

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
Garfield Elementary SchoolF
Elementary · Grades KG–8 · 0.6 mi
H
Menlo-Atherton High SchoolA
High · Grades 9–12 · 1.8 mi

District: Redwood City Elementary School District

Neighborhood · ZIP 94027These 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.98
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 100.511

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.87%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.28%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.5%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.9%
PopulationHow many people live in this area.7,126
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,411 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$294,375
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$482,221
Average tempThe average temperature here across a full year.59°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.66%

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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

27 Adam Way 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 West Atherton
  • Costs more per square foot than 94% of homes in San Mateo County
  • Bigger than 98% of homes in San Mateo County
  • Has a bigger lot than 87% of homes in San Mateo County
  • Newer than 89% of homes in San Mateo County

What homes are worth in Atherton 94027

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

This home
$2.6M$10M

This home is worth more than almost all homes in Atherton 94027.

How it measures up in Atherton 94027

The dot is this home. The mark in the middle is the typical home in Atherton 94027.

Estimated value$9,999,999
CheaperTypical $9,153,485Pricier

Pricier than almost all homes nearby

Price per ft²$1785
CheaperTypical $2007Pricier

Pricier than 36% of homes nearby

Living area5,603 ft²
SmallerTypical 3,930 ft²Bigger

Bigger than 71% of homes nearby

Lot size0.94 ac
SmallerTypical 1 acBigger

Bigger than 41% of homes nearby

Year built1990
OlderTypical 1958Newer

Newer than 70% of homes nearby

How 27 Adam Way ranks against every home in each area.
MeasureThis homeWest AthertonAtherton 94027San Mateo County
Estimated valuepricier than$9,999,999almost all homesalmost all homesalmost all homes
Price per ft²pricier than$178536% of homes36% of homes94% of homes
Living areabigger than5,603 ft²61% of homes71% of homes98% of homes
Lot sizebigger than0.94 ac32% of homes41% of homes87% of homes
Year builtnewer than199064% of homes70% of homes89% of homes

About 27 Adam Way

How much is 27 Adam Way, Atherton, CA worth?

The TopHap Estimate for 27 Adam Way, Atherton, CA is $9,999,999 as of Oct 21, 2026. The likely range is $9,999,999 to $9,999,999. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 27 Adam Way, Atherton, CA last sell?

27 Adam Way, Atherton, CA last sold on May 21, 2018 for $11,850,000, according to the county's recorded deed. TopHap holds 5 recorded sales for this parcel.

How big is 27 Adam Way, Atherton, CA?

27 Adam Way, Atherton, CA has 5 bedrooms, 6.5 bathrooms, 5,603 square feet of living space and a 0.94-acre lot.

When was 27 Adam Way, Atherton, CA built?

27 Adam Way, Atherton, CA was built in 1990, making it 36 years old. The building has 2 stories.

What schools serve 27 Adam Way, Atherton, CA?

27 Adam Way, Atherton, CA is assigned to Garfield Elementary School (elementary), rated F; Menlo-Atherton High School (high), rated A. All sit in Redwood City Elementary School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 27 Adam Way, Atherton, CA compare to other homes in Atherton 94027?

Among the 2,583 homes in Atherton 94027, it is worth more than almost all of them ($9,999,999 against a typical $9,153,485), its price per square foot is higher than 36% of them ($1785 against a typical $2007), it is bigger than 71% of them (5,603 ft² against a typical 3,930 ft²), its lot is bigger than 41% of them (0.94 ac against a typical 1 ac) and it is newer than 70% of them (1990 against a typical 1958). Measured against all of San Mateo 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 27 Adam Way, Atherton, CA?

The 2025 property tax bill for 27 Adam Way, Atherton, CA was $148,776. The county assessed it at $13,752,938.

More homes on Adam Way

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Assigned schools

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