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Single Family ResidenceResidential
$5,028,434$1,557 / 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 Sep 24, 2026

358 ALAMOS RD

PORTOLA VALLEY, CA 94028
3
Beds
2.5
Baths
3,230 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.
3.06 ac
Lot SizeThe size of the land the home sits on, from county records.
1955
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

$5M
$4.3M low$5.7M high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,244 (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.$308,805 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$106,013
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$202,792
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$302,751
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$6,200,460

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
FireplaceWhether the home has a fireplace, and what kind.Yes
GarageWhether the property has a garage, and details like whether it is attached to the home.Carport (Unspecified)
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(2)

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
Ormondale SchoolA+
Elementary · Grades KG–3 · 1.4 mi
M
Corte Madera SchoolA+
Middle · Grades 4–8 · 1.9 mi
H
Woodside High SchoolB+
High · Grades 9–12 · 3.9 mi

District: Portola Valley Elementary School District

Neighborhood · ZIP 94028These 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.75
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.83
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.708

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.91%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.32%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.3%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.0%
PopulationHow many people live in this area.6,086
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.365 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$234,946
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$375,942
Average tempThe average temperature here across a full year.58°F
Annual precipHow much rain and melted snow falls here in a typical year.33 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.67%

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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

358 Alamos Rd 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 90% of homes in San Mateo County
  • Bigger than 91% of homes in San Mateo County
  • Has a bigger lot than 94% of homes in Portola Valley 94028
  • Older than 83% of homes in Westridge

What homes are worth in Portola Valley 94028

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

This home
$1.7M$10M

This home is worth more than 73% of homes in Portola Valley 94028.

How it measures up in Portola Valley 94028

The dot is this home. The mark in the middle is the typical home in Portola Valley 94028.

Estimated value$5,028,434
CheaperTypical $3,811,547Pricier

Pricier than 73% of homes nearby

Price per ft²$1557
CheaperTypical $1434Pricier

Pricier than 67% of homes nearby

Living area3,230 ft²
SmallerTypical 2,720 ft²Bigger

Bigger than 68% of homes nearby

Lot size3.06 ac
SmallerTypical 0.82 acBigger

Bigger than 94% of homes nearby

Year built1955
OlderTypical 1963Newer

Newer than 25% of homes nearby

How 358 Alamos Rd ranks against every home in each area.
MeasureThis homeWestridgePortola Valley 94028San Mateo County
Estimated valuepricier than$5,028,43416% of homes73% of homes95% of homes
Price per ft²pricier than$155726% of homes67% of homes90% of homes
Living areabigger than3,230 ft²32% of homes68% of homes91% of homes
Lot sizebigger than3.06 ac79% of homes94% of homes93% of homes
Year builtnewer than195517% of homes25% of homes43% of homes

About 358 Alamos Rd

How much is 358 Alamos Rd, Portola Valley, CA worth?

The TopHap Estimate for 358 Alamos Rd, Portola Valley, CA is $5,028,434 as of Sep 24, 2026. The likely range is $4,325,018 to $5,731,850. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 358 Alamos Rd, Portola Valley, CA last sell?

358 Alamos Rd, Portola Valley, CA last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 358 Alamos Rd, Portola Valley, CA?

358 Alamos Rd, Portola Valley, CA has 3 bedrooms, 2.5 bathrooms and 3,230 square feet of living space.

When was 358 Alamos Rd, Portola Valley, CA built?

358 Alamos Rd, Portola Valley, CA was built in 1955, making it 71 years old. The building has 1 story.

What schools serve 358 Alamos Rd, Portola Valley, CA?

358 Alamos Rd, Portola Valley, CA is assigned to Ormondale School (elementary), rated A+; Corte Madera School (middle), rated A+; Woodside High School (high), rated B+. All sit in Portola Valley Elementary School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 358 Alamos Rd, Portola Valley, CA compare to other homes in Portola Valley 94028?

Among the 2,380 homes in Portola Valley 94028, it is worth more than 73% of them ($5,028,434 against a typical $3,811,547), its price per square foot is higher than 67% of them ($1557 against a typical $1434), it is bigger than 68% of them (3,230 ft² against a typical 2,720 ft²), its lot is bigger than 94% of them (3.06 ac against a typical 0.82 ac) and it is newer than 25% of them (1955 against a typical 1963). 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 358 Alamos Rd, Portola Valley, CA?

The 2025 property tax bill for 358 Alamos Rd, Portola Valley, CA was $3,244. The county assessed it at $308,805.

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