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321 N San Mateo Dr

SAN MATEO, CA 94401
0.39 ac
Lot SizeThe size of the land the home sits on, from county records.
2000
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
1
ParkingThe number of parking spaces on the property, including the garage.
Built 20001 floors13 units1,070–1,330 ft²
$11M
All units combinedThe sum of our current value estimates for every unit in the building — roughly what the whole building's homes are worth together.
$864K
Median unit valueThe middle unit value in this building by our estimate: half the units are worth more, half less.
$722
Median $/ft²The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.

-0.5%vs the San Mateo ZIP median sale $/ft² ($726)

Sales Performance

$980K
Median sale (12 mo)The middle sale price among this building's units that sold in the last 12 months, from recorded deeds.
—
1-yr changeHow the building's median sale price over the last 12 months compares with the 12 months before that.
1
Sales (12 mo)Units in this building that sold in the last 12 months, from recorded arms-length deeds.
7.7%
Turnover (12 mo)The share of units that changed hands in the last 12 months. Around 4–6% a year is typical; much higher can signal investor churn or a wave of exits.
This building's own appreciationThe building's own appreciation: for every unit that sold twice (held over a year), we compute its yearly price change between the two sales and take the middle value. This is the cleanest read on how this specific building performs, because it compares each unit to itself.
+2.2%per yeartypical hold 6.3 yrsfrom 12 same-unit resales
Median sale price (yearly, all time)Every recorded arms-length sale in the building since records begin, grouped by year: the bars count sales and the line tracks the median price paid.MedianSales
20012004200720092010201220202026
Sale price per ft² (yearly, all time)The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.$/ft²
20012004200720092010201220202026

22 arms-length sales on record for this building.

Unit Mix & Floor PlansThe building's recurring floor plans, found by grouping units with identical beds, baths and square footage in county records. Larger groups are the building's standard layouts; leftover units have one-off sizes.

Every unit: size vs estimated valueEvery unit in the building as one dot: across is its size, up is our current value estimate, and color is its bedroom count. Vertical columns of dots are recurring floor plans; the height spread within a column shows how much floor, view and condition move prices for the same layout.
$686K$782K$878K$974K1,070 ft²1,122 ft²1,174 ft²1,226 ft²1,278 ft²1,330 ft²
2 bd
2 bed
13 units
Recurring floor plansThe building's recurring floor plans, found by grouping units with identical beds, baths and square footage in county records. Larger groups are the building's standard layouts; leftover units have one-off sizes.
2 bd · 2.5 ba · 1,120 ft²
3 units
2 bd · 2.5 ba · 1,080 ft²
2 units
2 bd · 2.5 ba · 1,140 ft²
2 units
2 bd · 2.5 ba · 1,260 ft²
2 units
One-off layouts
4 units

Value DistributionHow the building's units spread across value ranges by our current estimates. A wide spread usually means big differences in size, floor or view.

$686K–$686K
1 unit
$788K–$788K
1 unit
$800K–$824K
3 units
$839K–$864K
2 units
$872K–$881K
2 units
$910K–$910K
2 units
$942K–$974K
2 units

Ownership & Financing

Owner-occupiedThe share of units where the owner lives in the unit, per county records. The rest are second homes or rentals.62%
Company-ownedUnits owned through an LLC, trust, or other company — a rough proxy for investor ownership.46%
Typical owner tenureThe middle number of years since each unit last changed hands — how long the current owners have been in place.16.6 yrs
Cash purchases (5 yrs)The share of purchases in the last 5 years with no mortgage recorded. High cash share is common in second-home and investor buildings.0%
Avg. loan-to-valueAverage current loan balance against unit value across the building. Low numbers mean owners hold lots of equity — a sign of financial stability.52%
Median owner equityThe middle dollar amount of equity (value minus loans) unit owners hold in this building.$883,051
Median tax billThe middle annual property tax bill among the building's units.$11,846
Pre-foreclosure noticesUnits with an active pre-foreclosure or foreclosure notice on file.0

Recent SalesThe latest recorded arms-length sales in the building, newest first.

Unit 104Mar 9, 2026$980,000Unit 113Oct 7, 2022$1,057,500Unit 110Jun 5, 2020$1,030,000Unit 113Aug 11, 2015$780,000Unit 111Jun 30, 2015$788,000Unit 104Feb 20, 2015$775,000Unit 105Dec 5, 2012$583,000Unit 110Nov 18, 2011$500,000Unit 108Apr 5, 2011$635,000Unit 112Jan 22, 2010$525,000

Values are TopHap estimates, not appraisals. Sales, ownership and tax figures come from recorded county documents via ATTOM and can lag by several weeks.

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.15 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.34%
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.0.2 percent flood zone

Scores 0–100; higher = greater projected risk.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Condominium
StyleThe architectural style of the home, such as ranch or colonial.Condo/Apartment
CountySAN MATEO
Lot (acres)The size of the land the home sits on, from county records.0.39
PoolWhether the property has a pool, and what kind, such as in-ground.No
ViewThe type of view from the property, or another feature of the site that affects value.End Unit

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

H
San Mateo High SchoolA
High · Grades 9–12 · 0.4 mi
E
San Mateo Park Elementary SchoolD-
Elementary · Grades KG–5 · 0.6 mi
M
Borel Middle SchoolA-
Middle · Grades 6–8 · 1.6 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%

All UnitsEvery property record the county has at this street address, such as the units in a condo building. Prices shown are our estimates, not asking prices.

321 N San Mateo Dr # 101
2 bd · 2.5 ba · 1,260 ft²
$910K
321 N San Mateo Dr # 102
2 bd · 2.5 ba · 1,260 ft²
$910K
321 N San Mateo Dr # 103
2 bd · 2.5 ba · 1,070 ft²
$686K
321 N San Mateo Dr # 104
2 bd · 2.5 ba · 1,120 ft²
$974K
321 N San Mateo Dr # 105
2 bd · 2.5 ba · 1,120 ft²
$788K
321 N San Mateo Dr # 106
2 bd · 2.5 ba · 1,080 ft²
$800K
321 N San Mateo Dr # 107
2 bd · 2.5 ba · 1,080 ft²
$824K
321 N San Mateo Dr # 108
2 bd · 2.5 ba · 1,280 ft²
$839K
321 N San Mateo Dr # 109
2 bd · 2.5 ba · 1,330 ft²
$864K
321 N San Mateo Dr # 110
2 bd · 2.5 ba · 1,120 ft²
$881K
321 N San Mateo Dr # 111
2 bd · 2.5 ba · 1,140 ft²
$872K
321 N San Mateo Dr # 112
2 bd · 2.5 ba · 1,140 ft²
$806K
321 N San Mateo Dr # 113
2 bd · 2.5 ba · 1,290 ft²
$942K

Data by ATTOM. Valuations are automated estimates, not appraisals. Photos from Google Street View and may not depict the current property state.

About 321 N San Mateo Dr

How many units are in 321 N San Mateo Dr, San Mateo, CA?

321 N San Mateo Dr, San Mateo, CA has 13 residential units across 1 floors, built in 2000, according to county assessor records.

What is a unit at 321 N San Mateo Dr, San Mateo, CA worth?

The median TopHap Estimate across the 13 units at 321 N San Mateo Dr, San Mateo, CA is $864,314. That works out to $722 per square foot. Units run from 1,070 to 1,330 square feet. Estimates are modelled from recorded sales and assessments, not appraisals.

Is 321 N San Mateo Dr, San Mateo, CA expensive for San Mateo?

Units at 321 N San Mateo Dr, San Mateo, CA carry a median of $722 per square foot, 1% below the San Mateo median of $726 per square foot.

How often do units sell at 321 N San Mateo Dr, San Mateo, CA?

1 units at 321 N San Mateo Dr, San Mateo, CA sold in the last 12 months, out of 22 recorded arms-length sales all time. That is a turnover rate of 7.7% of the building per year. The median sale over that period was $980K.

Have units at 321 N San Mateo Dr, San Mateo, CA appreciated?

Across 12 repeat sales of the same unit, 321 N San Mateo Dr, San Mateo, CA returned a median 2.2% per year. Because each pair is the same unit bought and sold, the figure is not distorted by which units traded. The median owner held for 6.3 years.

What floor plans does 321 N San Mateo Dr, San Mateo, CA have?

The most common plan at 321 N San Mateo Dr, San Mateo, CA is a 2-bedroom of 1,120 square feet, repeated 3 times, with a median estimate of $881,214. TopHap identifies 4 recurring plans in the building.

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