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Single Family ResidenceResidential
$1,365,097$843 / 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 Sep 24, 2026
Last sold for $1,250,000 on Nov 18, 2025

320 S HUMBOLDT ST

SAN MATEO, CA 94401
2
Beds
2.5
Baths
1,620 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.
2,023 ft²
Lot SizeThe size of the land the home sits on, from county records.
1999
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
7
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

$1.4M
$1.3M low$1.5M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$1,250,000 · Nov 18, 2025

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$12,365 (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.$1,308,000 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$654,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$654,000
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$910,992

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.0.05
HeatingThe type of heating system in the home.Central
CoolingThe type of cooling or air conditioning in the home.None
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(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.

E
Sunnybrae Elementary SchoolD-
Elementary · Grades KG–5 · 0.5 mi
H
San Mateo High SchoolA-
High · Grades 9–12 · 0.9 mi
M
Borel Middle SchoolB
Middle · Grades 6–8 · 1.4 mi

District: San Mateo-Foster City Elementary School District

Neighborhood · ZIP 94401These 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.105
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.84
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.537

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.94%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.25%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.11%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.3%
PopulationHow many people live in this area.32,992
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.8,021 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$113,608
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$152,157
Average tempThe average temperature here across a full year.58°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

320 S Humboldt 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 more than 82% of homes in North Central
  • Costs more per square foot than 65% of homes in North Central
  • Bigger than 75% of homes in North Central
  • Among the smallest lots in San Mateo 94401
  • Newer than 96% of homes in North Central

What homes are worth in San Mateo 94401

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

This home
$365K$2.5M

This home is worth more than 69% of homes in San Mateo 94401.

How it measures up in San Mateo 94401

The dot is this home. The mark in the middle is the typical home in San Mateo 94401.

Estimated value$1,365,097
CheaperTypical $1,170,850Pricier

Pricier than 69% of homes nearby

Price per ft²$843
CheaperTypical $856Pricier

Pricier than 49% of homes nearby

Living area1,620 ft²
SmallerTypical 1,230 ft²Bigger

Bigger than 72% of homes nearby

Lot size2,023 ft²
SmallerTypical 0.16 acBigger

Smaller than almost all homes nearby

Year built1999
OlderTypical 1954Newer

Newer than 95% of homes nearby

How 320 S Humboldt St ranks against every home in each area.
MeasureThis homeNorth CentralSan Mateo 94401San Mateo County
Estimated valuepricier than$1,365,09782% of homes69% of homes45% of homes
Price per ft²pricier than$84365% of homes49% of homes35% of homes
Living areabigger than1,620 ft²75% of homes72% of homes50% of homes
Lot sizebigger than2,023 ft²2% of homesalmost no homes3% of homes
Year builtnewer than199996% of homes95% of homes93% of homes

About 320 S Humboldt St

How much is 320 S Humboldt St, San Mateo, CA worth?

The TopHap Estimate for 320 S Humboldt St, San Mateo, CA is $1,365,097 as of Sep 24, 2026. The likely range is $1,279,061 to $1,451,133. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 320 S Humboldt St, San Mateo, CA last sell?

320 S Humboldt St, San Mateo, CA last sold on Nov 18, 2025 for $1,250,000, according to the county's recorded deed. TopHap holds 4 recorded sales for this parcel.

How big is 320 S Humboldt St, San Mateo, CA?

320 S Humboldt St, San Mateo, CA has 2 bedrooms, 2.5 bathrooms, 1,620 square feet of living space and a 0.05-acre lot.

When was 320 S Humboldt St, San Mateo, CA built?

320 S Humboldt St, San Mateo, CA was built in 1999, making it 27 years old. The building has 2 stories.

What schools serve 320 S Humboldt St, San Mateo, CA?

320 S Humboldt St, San Mateo, CA is assigned to Sunnybrae Elementary School (elementary), rated D-; San Mateo High School (high), rated A-; Borel Middle School (middle), rated B. All sit in San Mateo-Foster City Elementary School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 320 S Humboldt St, San Mateo, CA compare to other homes in San Mateo 94401?

Among the 8,111 homes in San Mateo 94401, it is worth more than 69% of them ($1,365,097 against a typical $1,170,850), its price per square foot is higher than 49% of them ($843 against a typical $856), it is bigger than 72% of them (1,620 ft² against a typical 1,230 ft²), its lot is bigger than almost none of them (2,023 ft² against a typical 0.16 ac) and it is newer than 95% of them (1999 against a typical 1954). Measured against all of San Mateo County, it is worth more than 45% 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 320 S Humboldt St, San Mateo, CA?

The 2025 property tax bill for 320 S Humboldt St, San Mateo, CA was $12,365. The county assessed it at $1,308,000.

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