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CondominiumResidential

21 S Claremont St

SAN MATEO, CA 94401
0.38 ac
Lot SizeThe size of the land the home sits on, from county records.
2011
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
2
ParkingThe number of parking spaces on the property, including the garage.
Built 201118 units390–1,140 ft²
$12M
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.
$733K
Median unit valueThe middle unit value in this building by our estimate: half the units are worth more, half less.
$843
Median $/ft²The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.

+96.6%vs the San Mateo ZIP median sale $/ft² ($429)

Sales Performance

—
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.
0
Sales (12 mo)Units in this building that sold in the last 12 months, from recorded arms-length deeds.
0.0%
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.
+12.4%per yeartypical hold 7.8 yrsfrom 6 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
20102011201320142018201920202021
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
20102011201320142018201920202021

26 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.
$381K$610K$838K$1.1M390 ft²540 ft²690 ft²840 ft²990 ft²1,140 ft²
1 bd2 bd
1 bed
4 units
2 bed
14 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 ba · 1,000 ft²
4 units
2 bd · 2 ba · 1,140 ft²
3 units
1 bd · 1.5 ba · 390 ft²
2 units
1 bd · 1.5 ba · 400 ft²
2 units
2 bd · 1.5 ba · 780 ft²
2 units
2 bd · 2 ba · 950 ft²
2 units
2 bd · 1.5 ba · 950 ft²
2 units
One-off layouts
1 unit

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.

$381K–$388K
2 units
$538K–$538K
1 unit
$656K–$719K
5 units
$733K–$801K
5 units
$854K–$863K
2 units
$1000K–$1.1M
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.33%
Company-ownedUnits owned through an LLC, trust, or other company — a rough proxy for investor ownership.67%
Typical owner tenureThe middle number of years since each unit last changed hands — how long the current owners have been in place.13.5 yrs
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.24%
Median owner equityThe middle dollar amount of equity (value minus loans) unit owners hold in this building.$666,055
Median tax billThe middle annual property tax bill among the building's units.$8,080
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 13May 5, 2021$510,500Unit 2Feb 5, 2021$950,000Unit 3Feb 5, 2021$930,000Unit 14Nov 10, 2020$236,000Unit 7Oct 11, 2019$1,000,000Unit 1May 13, 2019$945,000Unit 16Jul 13, 2018$500,000Unit 1Apr 8, 2014$645,000Unit 1Sep 12, 2013$500,000Unit 9Apr 11, 2013$325,000

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

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.0.38
HeatingThe type of heating system in the home.Central
CoolingThe type of cooling or air conditioning in the home.None
FireplaceWhether the home has a fireplace, and what kind.Yes
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 · 0.7 mi
M
Abbott Middle SchoolC
Middle · Grades 6–8 · 2.7 mi
E
Laurel Elementary SchoolD+
Elementary · Grades KG–5 · 2.8 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%

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.

21 S Claremont St
2 bd · 2 ba · 1,140 ft²
$1000K
21 S Claremont St
2 bd · 2 ba · 1,000 ft²
$854K
21 S Claremont St # 3
2 bd · 1.5 ba · 950 ft²
$801K
21 S Claremont St # 4
2 bd · 2 ba · 950 ft²
$707K
21 S Claremont St # 5
2 bd · 2 ba · 1,000 ft²
$743K
21 S Claremont St # 6
2 bd · 1 ba · 960 ft²
$863K
21 S Claremont St # 7
2 bd · 2 ba · 1,140 ft²
$1.1M
21 S Claremont St # 8
2 bd · 2 ba · 1,000 ft²
$719K
21 S Claremont St # 9
2 bd · 1.5 ba · 950 ft²
$734K
21 S Claremont St # 10
2 bd · 2 ba · 950 ft²
$733K
21 S Claremont St # 11
2 bd · 2 ba · 1,000 ft²
$714K
21 S Claremont St # 12
2 bd · 2 ba · 1,140 ft²
$734K
21 S Claremont St # 13
1 bd · 1.5 ba · 400 ft²
21 S Claremont St # 14
1 bd · 1.5 ba · 390 ft²
$381K
21 S Claremont St # 15
1 bd · 1.5 ba · 390 ft²
$388K
21 S Claremont St # 16
1 bd · 1.5 ba · 400 ft²
$538K
21 S Claremont St # 17
2 bd · 1.5 ba · 780 ft²
$689K
21 S Claremont St # 18
2 bd · 1.5 ba · 780 ft²
$656K

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

About 21 S Claremont St

How many units are in 21 S Claremont St, San Mateo, CA?

21 S Claremont St, San Mateo, CA has 18 residential units across built in 2011, according to county assessor records.

What is a unit at 21 S Claremont St, San Mateo, CA worth?

The median TopHap Estimate across the 18 units at 21 S Claremont St, San Mateo, CA is $733,216. That works out to $843 per square foot. Units run from 390 to 1,140 square feet. Estimates are modelled from recorded sales and assessments, not appraisals.

Is 21 S Claremont St, San Mateo, CA expensive for San Mateo?

Units at 21 S Claremont St, San Mateo, CA carry a median of $843 per square foot, 97% above the San Mateo median of $429 per square foot.

How often do units sell at 21 S Claremont St, San Mateo, CA?

0 units at 21 S Claremont St, San Mateo, CA sold in the last 12 months, out of 26 recorded arms-length sales all time. That is a turnover rate of 0.0% of the building per year.

Have units at 21 S Claremont St, San Mateo, CA appreciated?

Across 6 repeat sales of the same unit, 21 S Claremont St, San Mateo, CA returned a median 12.4% 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 7.8 years.

What floor plans does 21 S Claremont St, San Mateo, CA have?

The most common plan at 21 S Claremont St, San Mateo, CA is a 2-bedroom of 1,000 square feet, repeated 4 times, with a median estimate of $730,769. TopHap identifies 7 recurring plans in the building.

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