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Single Family ResidenceResidential
$4,385,000$1,907 / 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 94How 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 $4,385,000 on Jul 1, 2026

31 RITTENHOUSE AVE

ATHERTON, CA 94027
2
Beds
3
Baths
2,300 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.
0.32 ac
Lot SizeThe size of the land the home sits on, from county records.
1939
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
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

$4.4M
$4.1M low$4.6M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$4,385,000 · Jul 1, 2026
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.$1,754,000
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$1,403,200
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.63%
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.$2,631,000
WELLS FARGO · 4.75% 1 · recorded Jul 1, 2026

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$27,244 (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.$2,429,999 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$1,970,275
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$459,724
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$2,382,353
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$3,892,320

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.8 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
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
CountySAN MATEO
Lot (acres)The size of the land the home sits on, from county records.0.32
HeatingThe type of heating system in the home.Central
CoolingThe type of cooling or air conditioning in the home.Central
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Basement
PoolWhether the property has a pool, and what kind, such as in-ground.No

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
Garfield Elementary SchoolB-
Elementary · Grades KG–8 · 0.3 mi
H
Menlo-Atherton High SchoolA-
High · Grades 9–12 · 1.6 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%

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

31 Rittenhouse Ave 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 95% of homes in San Mateo County
  • Costs more per square foot than 97% of homes in San Mateo County
  • Smaller than 85% of homes in Atherton 94027
  • Has a smaller lot than 89% of homes in Atherton 94027
  • Older than 92% of homes in Lloyden Park

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
$1.4M$9.2M

This home is worth more than 22% 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$4,385,000
CheaperTypical $6,606,477Pricier

Pricier than 22% of homes nearby

Price per ft²$1907
CheaperTypical $2188Pricier

Pricier than 30% of homes nearby

Living area2,300 ft²
SmallerTypical 3,930 ft²Bigger

Bigger than 15% of homes nearby

Lot size0.32 ac
SmallerTypical 1 acBigger

Bigger than 11% of homes nearby

Year built1939
OlderTypical 1958Newer

Newer than 13% of homes nearby

How 31 Rittenhouse Ave ranks against every home in each area.
MeasureThis homeLloyden ParkAtherton 94027San Mateo County
Estimated valuepricier than$4,385,00049% of homes22% of homes95% of homes
Price per ft²pricier than$190754% of homes30% of homes97% of homes
Living areabigger than2,300 ft²48% of homes15% of homes77% of homes
Lot sizebigger than0.32 ac28% of homes11% of homes79% of homes
Year builtnewer than19398% of homes13% of homes11% of homes

About 31 Rittenhouse Ave

How much is 31 Rittenhouse Ave, Atherton, CA worth?

The TopHap Estimate for 31 Rittenhouse Ave, Atherton, CA is $4,385,000 as of Jul 14, 2026. The likely range is $4,142,268 to $4,627,732. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 31 Rittenhouse Ave, Atherton, CA last sell?

31 Rittenhouse Ave, Atherton, CA last sold on Jul 1, 2026 for $4,385,000, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 31 Rittenhouse Ave, Atherton, CA?

31 Rittenhouse Ave, Atherton, CA has 2 bedrooms, 3 bathrooms, 2,300 square feet of living space and a 0.32-acre lot.

When was 31 Rittenhouse Ave, Atherton, CA built?

31 Rittenhouse Ave, Atherton, CA was built in 1939, making it 87 years old. The building has 1 story.

What schools serve 31 Rittenhouse Ave, Atherton, CA?

31 Rittenhouse Ave, Atherton, CA is assigned to Garfield Elementary School (elementary), rated B-; 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 31 Rittenhouse Ave, Atherton, CA compare to other homes in Atherton 94027?

Among the 2,584 homes in Atherton 94027, it is worth more than 22% of them ($4,385,000 against a typical $6,606,477), its price per square foot is higher than 30% of them ($1907 against a typical $2188), it is bigger than 15% of them (2,300 ft² against a typical 3,930 ft²), its lot is bigger than 11% of them (0.32 ac against a typical 1 ac) and it is newer than 13% of them (1939 against a typical 1958). Measured against all of San Mateo County, it is worth more than 95% 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 31 Rittenhouse Ave, Atherton, CA?

The 2025 property tax bill for 31 Rittenhouse Ave, Atherton, CA was $27,244. The county assessed it at $2,429,999.

Closest homes

More homes in Atherton 94027

Assigned schools

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