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Single Family ResidenceResidential
$8,748,298$2,751 / 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 Oct 21, 2026
Last sold for $8,000,000 on Sep 12, 2018

175 ALTA VISTA DR

ATHERTON, CA 94027
3
Beds
4
Baths
3,180 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.
1.14 ac
Lot SizeThe size of the land the home sits on, from county records.
1940
Year BuiltThe year the home was originally built, according to county records.
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

$8.7M
$7.6M low$9.9M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$8,000,000 · Sep 12, 2018

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$99,372 (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.$9,102,630 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$8,988,849
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$113,781
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$8,924,148
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$6,207,570

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountySAN MATEO
HeatingThe type of heating system in the home.Central
CoolingThe type of cooling or air conditioning in the home.Central
PoolWhether the property has a pool, and what kind, such as in-ground.Yes

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.

H
Woodside High SchoolB+
High · Grades 9–12 · 0.7 mi
E
Las Lomitas Elementary SchoolA+
Elementary · Grades KG–3 · 0.8 mi
M
La Entrada SchoolA+
Middle · Grades 4–8 · 1.5 mi

District: Las Lomitas 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

175 Alta Vista 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 98% of homes in San Mateo County
  • Among the highest price per square foot in San Mateo County
  • Bigger than 91% of homes in San Mateo County
  • Has a bigger lot than 89% of homes in San Mateo County
  • Older than 94% of homes in West of Alameda

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
$2.5M$10M

This home is worth more than 47% of 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$8,748,298
CheaperTypical $9,125,538Pricier

Pricier than 47% of homes nearby

Price per ft²$2751
CheaperTypical $2000Pricier

Pricier than 86% of homes nearby

Living area3,180 ft²
SmallerTypical 3,940 ft²Bigger

Bigger than 34% of homes nearby

Lot size1.14 ac
SmallerTypical 1 acBigger

Bigger than 78% of homes nearby

Year built1940
OlderTypical 1958Newer

Newer than 15% of homes nearby

How 175 Alta Vista Dr ranks against every home in each area.
MeasureThis homeWest of AlamedaAtherton 94027San Mateo County
Estimated valuepricier than$8,748,29836% of homes47% of homes98% of homes
Price per ft²pricier than$275189% of homes86% of homesalmost all homes
Living areabigger than3,180 ft²20% of homes34% of homes91% of homes
Lot sizebigger than1.14 ac58% of homes78% of homes89% of homes
Year builtnewer than19406% of homes15% of homes12% of homes

About 175 Alta Vista Dr

How much is 175 Alta Vista Dr, Atherton, CA worth?

The TopHap Estimate for 175 Alta Vista Dr, Atherton, CA is $8,748,298 as of Oct 21, 2026. The likely range is $7,553,106 to $9,943,491. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 175 Alta Vista Dr, Atherton, CA last sell?

175 Alta Vista Dr, Atherton, CA last sold on Sep 12, 2018 for $8,000,000, according to the county's recorded deed.

How big is 175 Alta Vista Dr, Atherton, CA?

175 Alta Vista Dr, Atherton, CA has 3 bedrooms, 4 bathrooms and 3,180 square feet of living space.

When was 175 Alta Vista Dr, Atherton, CA built?

175 Alta Vista Dr, Atherton, CA was built in 1940, making it 86 years old.

What schools serve 175 Alta Vista Dr, Atherton, CA?

175 Alta Vista Dr, Atherton, CA is assigned to Woodside High School (high), rated B+; Las Lomitas Elementary School (elementary), rated A+; La Entrada School (middle), rated A+. All sit in Las Lomitas Elementary School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 175 Alta Vista Dr, Atherton, CA compare to other homes in Atherton 94027?

Among the 2,583 homes in Atherton 94027, it is worth more than 47% of them ($8,748,298 against a typical $9,125,538), its price per square foot is higher than 86% of them ($2751 against a typical $2000), it is bigger than 34% of them (3,180 ft² against a typical 3,940 ft²), its lot is bigger than 78% of them (1.14 ac against a typical 1 ac) and it is newer than 15% of them (1940 against a typical 1958). Measured against all of San Mateo County, it is worth more than 98% 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 175 Alta Vista Dr, Atherton, CA?

The 2025 property tax bill for 175 Alta Vista Dr, Atherton, CA was $99,372. The county assessed it at $9,102,630.

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