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Single Family ResidenceResidential
$4,130,281$2,047 / 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 Oct 21, 2026
Last sold for $3,200,000 on Jul 12, 2019

30 SOUTHGATE ST

ATHERTON, CA 94027
3
Beds
2
Baths
2,018 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.
0.15 ac
Lot SizeThe size of the land the home sits on, from county records.
1912
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
9
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$4.1M
$3.8M 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.$3,200,000 · Jul 12, 2019

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$39,469 (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.$3,569,657 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$2,788,796
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$780,861
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$3,499,664
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$3,996,090

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.0.15
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.No

Transaction History(16)

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 · 1.7 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

30 Southgate St 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 less than 97% of homes in West Atherton
  • Costs more per square foot than 97% of homes in San Mateo County
  • Smaller than 93% of homes in West Atherton
  • Among the smallest lots in West Atherton
  • Among the oldest 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 8% 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$4,130,281
CheaperTypical $9,125,301Pricier

Pricier than 8% of homes nearby

Price per ft²$2047
CheaperTypical $2004Pricier

Pricier than 53% of homes nearby

Living area2,018 ft²
SmallerTypical 3,920 ft²Bigger

Bigger than 10% of homes nearby

Lot size0.15 ac
SmallerTypical 1 acBigger

Bigger than 3% of homes nearby

Year built1912
OlderTypical 1958Newer

Newer than 2% of homes nearby

How 30 Southgate St ranks against every home in each area.
MeasureThis homeWest AthertonAtherton 94027San Mateo County
Estimated valuepricier than$4,130,2813% of homes8% of homes93% of homes
Price per ft²pricier than$204752% of homes53% of homes97% of homes
Living areabigger than2,018 ft²7% of homes10% of homes67% of homes
Lot sizebigger than0.15 acalmost no homes3% of homes57% of homes
Year builtnewer than19122% of homes2% of homesalmost no homes

About 30 Southgate St

How much is 30 Southgate St, Atherton, CA worth?

The TopHap Estimate for 30 Southgate St, Atherton, CA is $4,130,281 as of Oct 21, 2026. The likely range is $3,821,459 to $4,439,103. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 30 Southgate St, Atherton, CA last sell?

30 Southgate St, Atherton, CA last sold on Jul 12, 2019 for $3,200,000, according to the county's recorded deed. TopHap holds 7 recorded sales for this parcel.

How big is 30 Southgate St, Atherton, CA?

30 Southgate St, Atherton, CA has 3 bedrooms, 2 bathrooms, 2,018 square feet of living space and a 0.15-acre lot.

When was 30 Southgate St, Atherton, CA built?

30 Southgate St, Atherton, CA was built in 1912, making it 114 years old. The building has 1 story.

What schools serve 30 Southgate St, Atherton, CA?

30 Southgate St, 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 30 Southgate St, Atherton, CA compare to other homes in Atherton 94027?

Among the 2,583 homes in Atherton 94027, it is worth more than 8% of them ($4,130,281 against a typical $9,125,301), its price per square foot is higher than 53% of them ($2047 against a typical $2004), it is bigger than 10% of them (2,018 ft² against a typical 3,920 ft²), its lot is bigger than 3% of them (0.15 ac against a typical 1 ac) and it is newer than 2% of them (1912 against a typical 1958). Measured against all of San Mateo County, it is worth more than 93% 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 30 Southgate St, Atherton, CA?

The 2025 property tax bill for 30 Southgate St, Atherton, CA was $39,469. The county assessed it at $3,569,657.

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