Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$1,977,659$1,268 / 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 92How 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 $990,000 on Jun 12, 2007

1840 ALDEN ST

BELMONT, CA 94002
3
Beds
2
Baths
1,560 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.
0.13 ac
Lot SizeThe size of the land the home sits on, from county records.
1947
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
6
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$2M
$1.8M low$2.1M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$990,000 · Jun 12, 2007

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$17,112 (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.$1,352,902 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$676,451
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$676,451
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,326,376
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$2,018,430

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
StyleThe architectural style of the home, such as ranch or colonial.Ranch
CountySAN MATEO
Lot (acres)The size of the land the home sits on, from county records.0.13
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
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
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(7)

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
Central Elementary SchoolA
Elementary · Grades KG–5 · 0.8 mi
H
Carlmont High SchoolA+
High · Grades 9–12 · 0.8 mi
M
Ralston Middle SchoolA+
Middle · Grades 6–8 · 1.1 mi

District: Belmont-Redwood Shores Elementary School District

Neighborhood · ZIP 94002These 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.91
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.82
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.598

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.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.34%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.7.1%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.2%
PopulationHow many people live in this area.27,900
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.4,367 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$172,695
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$212,627
Average tempThe average temperature here across a full year.58°F
Annual precipHow much rain and melted snow falls here in a typical year.25 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

1840 Alden 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 66% of homes in San Mateo County
  • Costs more per square foot than 78% of homes in Central
  • Has a smaller lot than 76% of homes in Central
  • Older than 87% of homes in Belmont 94002

What homes are worth in Belmont 94002

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

This home
$624K$3.5M

This home is worth more than 42% of homes in Belmont 94002.

How it measures up in Belmont 94002

The dot is this home. The mark in the middle is the typical home in Belmont 94002.

Estimated value$1,977,659
CheaperTypical $2,098,000Pricier

Pricier than 42% of homes nearby

Price per ft²$1268
CheaperTypical $1157Pricier

Pricier than 66% of homes nearby

Living area1,560 ft²
SmallerTypical 1,820 ft²Bigger

Bigger than 36% of homes nearby

Lot size0.13 ac
SmallerTypical 0.16 acBigger

Bigger than 28% of homes nearby

Year built1947
OlderTypical 1959Newer

Newer than 13% of homes nearby

How 1840 Alden St ranks against every home in each area.
MeasureThis homeCentralBelmont 94002San Mateo County
Estimated valuepricier than$1,977,65953% of homes42% of homes66% of homes
Price per ft²pricier than$126878% of homes66% of homes75% of homes
Living areabigger than1,560 ft²41% of homes36% of homes47% of homes
Lot sizebigger than0.13 ac24% of homes28% of homes40% of homes
Year builtnewer than194723% of homes13% of homes20% of homes

About 1840 Alden St

How much is 1840 Alden St, Belmont, CA worth?

The TopHap Estimate for 1840 Alden St, Belmont, CA is $1,977,659 as of Sep 24, 2026. The likely range is $1,810,851 to $2,144,467. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 1840 Alden St, Belmont, CA last sell?

1840 Alden St, Belmont, CA last sold on Jun 12, 2007 for $990,000, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 1840 Alden St, Belmont, CA?

1840 Alden St, Belmont, CA has 3 bedrooms, 2 bathrooms, 1,560 square feet of living space and a 0.13-acre lot.

When was 1840 Alden St, Belmont, CA built?

1840 Alden St, Belmont, CA was built in 1947, making it 79 years old. It is a ranch home. The building has 1 story.

What schools serve 1840 Alden St, Belmont, CA?

1840 Alden St, Belmont, CA is assigned to Central Elementary School (elementary), rated A; Carlmont High School (high), rated A+; Ralston Middle School (middle), rated A+. All sit in Belmont-Redwood Shores Elementary School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 1840 Alden St, Belmont, CA compare to other homes in Belmont 94002?

Among the 7,604 homes in Belmont 94002, it is worth more than 42% of them ($1,977,659 against a typical $2,098,000), its price per square foot is higher than 66% of them ($1268 against a typical $1157), it is bigger than 36% of them (1,560 ft² against a typical 1,820 ft²), its lot is bigger than 28% of them (0.13 ac against a typical 0.16 ac) and it is newer than 13% of them (1947 against a typical 1959). Measured against all of San Mateo County, it is worth more than 66% 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 1840 Alden St, Belmont, CA?

The 2025 property tax bill for 1840 Alden St, Belmont, CA was $17,112. The county assessed it at $1,352,902.

More homes on Alden St

Closest homes

More homes in Belmont 94002

Assigned schools

Explore the area

See this home in context

Open 1840 Alden St 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