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CondominiumResidential
$836,247$1,005 / 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 96How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026
Last sold for $850,000 on May 21, 2021

1921 ROCK ST

MOUNTAIN VIEW, CA 94043
Building report
2
Beds
1
Baths
832 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.
832 ft²
Lot SizeThe size of the land the home sits on, from county records.
1963
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
3
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

$836K
$802K low$871K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$850,000 · May 21, 2021

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$10,885 (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.$910,000 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$455,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$455,000
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$920,066

Climate Risk

Overall riskThe average of the five hazard scores below, on a 0 to 100 scale. Higher means greater projected risk over the coming decades.42
66
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
27
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
23
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
32
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
62
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.10 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.51%
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.Custom Design
CountySANTA CLARA
Effective Year BuiltAn adjusted build year that accounts for condition and major remodels. A big renovation can make a home count as newer than it is.1974
Lot (acres)The size of the land the home sits on, from county records.0.02
ConstructionThe main material the home's frame and walls are built from.Wood (Unspecified)
HeatingThe type of heating system in the home.None
CoolingThe type of cooling or air conditioning in the home.None
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.

M
Crittenden Middle SchoolA
Middle · Grades 6–8 · 0.2 mi
E
Monta Loma Elementary SchoolB-
Elementary · Grades KG–5 · 0.6 mi
H
Los Altos High SchoolA+
High · Grades 9–12 · 2.1 mi

District: Mountain View Whisman Elementary School District

Neighborhood · ZIP 94043These 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.142
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.91
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.425

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.92%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.29%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.3%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.6%
PopulationHow many people live in this area.28,863
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,282 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$165,325
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$209,804
Average tempThe average temperature here across a full year.59°F
Annual precipHow much rain and melted snow falls here in a typical year.15 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.73%

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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

1921 Rock 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 less than 87% of homes in Santa Clara County
  • Smaller than 97% of homes in Santa Clara County
  • Has a smaller lot than 95% of homes in Santa Clara County
  • Older than 74% of homes in Mountain View 94043

What homes are worth in Mountain View 94043

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

This home
$540K$2.8M

This home is worth more than 14% of homes in Mountain View 94043.

How it measures up in Mountain View 94043

The dot is this home. The mark in the middle is the typical home in Mountain View 94043.

Estimated value$836,247
CheaperTypical $1,425,436Pricier

Pricier than 14% of homes nearby

Price per ft²$1005
CheaperTypical $973Pricier

Pricier than 54% of homes nearby

Living area832 ft²
SmallerTypical 1,384 ft²Bigger

Bigger than 7% of homes nearby

Lot size832 ft²
SmallerTypical 2,439 ft²Bigger

Bigger than 7% of homes nearby

Year built1963
OlderTypical 1974Newer

Newer than 26% of homes nearby

How 1921 Rock St ranks against every home in each area.
MeasureThis homeMountain View 94043Santa Clara County
Estimated valuepricier than$836,24714% of homes13% of homes
Price per ft²pricier than$100554% of homes61% of homes
Living areabigger than832 ft²7% of homes3% of homes
Lot sizebigger than832 ft²7% of homes5% of homes
Year builtnewer than196326% of homes38% of homes

About 1921 Rock St

How much is 1921 Rock St, Mountain View, CA worth?

The TopHap Estimate for 1921 Rock St, Mountain View, CA is $836,247 as of Aug 30, 2026. The likely range is $801,544 to $870,951. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 1921 Rock St, Mountain View, CA last sell?

1921 Rock St, Mountain View, CA last sold on May 21, 2021 for $850,000, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 1921 Rock St, Mountain View, CA?

1921 Rock St, Mountain View, CA has 2 bedrooms, 1 bathrooms, 832 square feet of living space and a 0.02-acre lot.

When was 1921 Rock St, Mountain View, CA built?

1921 Rock St, Mountain View, CA was built in 1963, making it 63 years old. It is a custom design home. The building has 1 story.

What schools serve 1921 Rock St, Mountain View, CA?

1921 Rock St, Mountain View, CA is assigned to Crittenden Middle School (middle), rated A; Monta Loma Elementary School (elementary), rated B-; Los Altos High School (high), rated A+. All sit in Mountain View Whisman Elementary School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 1921 Rock St, Mountain View, CA compare to other homes in Mountain View 94043?

Among the 8,797 homes in Mountain View 94043, it is worth more than 14% of them ($836,247 against a typical $1,425,436), its price per square foot is higher than 54% of them ($1005 against a typical $973), it is bigger than 7% of them (832 ft² against a typical 1,384 ft²), its lot is bigger than 7% of them (832 ft² against a typical 2,439 ft²) and it is newer than 26% of them (1963 against a typical 1974). Measured against all of Santa Clara County, it is worth more than 13% 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 1921 Rock St, Mountain View, CA?

The 2025 property tax bill for 1921 Rock St, Mountain View, CA was $10,885. The county assessed it at $910,000.

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