Skip to content
Skip to content
TopHapOpen in map
Duplex (2 Units, Any Combination)Residential
Last sold for $717,000 on Oct 9, 2003

623 PROSPECT ROW

SAN MATEO, CA 94401
2
Beds
2
Baths
2,550 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.
0.16 ac
Lot SizeThe size of the land the home sits on, from county records.
1926
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

Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$717,000 · Oct 9, 2003

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$15,428 (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.$1,039,793 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$812,119
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$227,674
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,019,406

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Duplex (2 Units, Any Combination)
StyleThe architectural style of the home, such as ranch or colonial.Duplex Single
CountySAN MATEO
Lot (acres)The size of the land the home sits on, from county records.0.16
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.Garage, Detached
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
San Mateo Park Elementary SchoolD-
Elementary · Grades KG–5 · 0.3 mi
H
San Mateo High SchoolA
High · Grades 9–12 · 0.6 mi
M
Borel Middle SchoolA-
Middle · Grades 6–8 · 1.8 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%

Owner Tools

Do you own this home?
Claim this home

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

623 Prospect Row 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.

  • Bigger than 90% of homes in San Mateo 94401
  • Has a smaller lot than 74% of homes in Downtown San Mateo
  • Older than 95% of homes in San Mateo County

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.

Living area2,550 ft²
SmallerTypical 1,223 ft²Bigger

Bigger than 90% of homes nearby

Lot size0.16 ac
SmallerTypical 0.17 acBigger

Bigger than 49% of homes nearby

Year built1926
OlderTypical 1954Newer

Newer than 11% of homes nearby

How 623 Prospect Row ranks against every home in each area.
MeasureThis homeDowntown San MateoSan Mateo 94401San Mateo County
Living areabigger than2,550 ft²84% of homes90% of homes83% of homes
Lot sizebigger than0.16 ac26% of homes49% of homes58% of homes
Year builtnewer than192620% of homes11% of homes5% of homes

About 623 Prospect Row

When did 623 Prospect Row, San Mateo, CA last sell?

623 Prospect Row, San Mateo, CA last sold on Oct 9, 2003 for $717,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 623 Prospect Row, San Mateo, CA?

623 Prospect Row, San Mateo, CA has 2 bedrooms, 2 bathrooms, 2,550 square feet of living space and a 0.16-acre lot.

When was 623 Prospect Row, San Mateo, CA built?

623 Prospect Row, San Mateo, CA was built in 1926, making it 100 years old. It is a duplex single home. The building has 1 story.

What schools serve 623 Prospect Row, San Mateo, CA?

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

How does 623 Prospect Row, San Mateo, CA compare to other homes in San Mateo 94401?

Among the 8,111 homes in San Mateo 94401, it is bigger than 90% of them (2,550 ft² against a typical 1,223 ft²), its lot is bigger than 49% of them (0.16 ac against a typical 0.17 ac) and it is newer than 11% of them (1926 against a typical 1954). These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 623 Prospect Row, San Mateo, CA?

The 2025 property tax bill for 623 Prospect Row, San Mateo, CA was $15,428. The county assessed it at $1,039,793.

More homes on Prospect Row

Closest homes

More homes in San Mateo 94401

Assigned schools

Explore the area

See this home in context

Open 623 Prospect Row on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map