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Single Family ResidenceResidential
$4,905,073$2,403 / 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 89How 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 $4,680,000 on Jun 2, 2025

143 LOWELL AVE

PALO ALTO, CA 94301
3
Beds
1.5
Baths
2,041 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.
4,000 ft²
Lot SizeThe size of the land the home sits on, from county records.
1931
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
7
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

$4.9M
$4.4M low$5.5M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$4,680,000 · Jun 2, 2025

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$43,535 (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.$1,917,600 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$1,876,800
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$40,800
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$3,537,360

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.35
25
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.
25
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
40
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
60
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.21 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
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.Single Family Residence
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.1948
Lot (acres)The size of the land the home sits on, from county records.0.09
ConstructionThe main material the home's frame and walls are built from.Wood (Unspecified)
HeatingThe type of heating system in the home.Yes
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(3)

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.

H
Palo Alto High SchoolA+
High · Grades 9–12 · 0.4 mi
E
Walter Hays Elementary SchoolA+
Elementary · Grades KG–5 · 0.6 mi
M
Frank S. Greene Jr Middle SchoolA+
Middle · Grades 6–8 · 0.8 mi

District: Palo Alto Unified School District

Neighborhood · ZIP 94301These 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.124
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.87
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.450

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.88%
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.5.2%
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.18,260
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.7,497 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$189,809
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$274,470
Average tempThe average temperature here across a full year.59°F
Annual precipHow much rain and melted snow falls here in a typical year.16 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

143 Lowell Ave 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 96% of homes in Santa Clara County
  • Among the highest price per square foot in Santa Clara County
  • Bigger than 70% of homes in Santa Clara County
  • Has a smaller lot than 96% of homes in Old Palo Alto
  • Older than 96% of homes in Santa Clara County

What homes are worth in Palo Alto 94301

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

This home
$1.1M$10M

This home is worth more than 56% of homes in Palo Alto 94301.

How it measures up in Palo Alto 94301

The dot is this home. The mark in the middle is the typical home in Palo Alto 94301.

Estimated value$4,905,073
CheaperTypical $4,594,329Pricier

Pricier than 56% of homes nearby

Price per ft²$2403
CheaperTypical $2080Pricier

Pricier than 76% of homes nearby

Living area2,041 ft²
SmallerTypical 2,182 ft²Bigger

Bigger than 45% of homes nearby

Lot size4,000 ft²
SmallerTypical 0.15 acBigger

Bigger than 21% of homes nearby

Year built1931
OlderTypical 1947Newer

Newer than 33% of homes nearby

How 143 Lowell Ave ranks against every home in each area.
MeasureThis homeOld Palo AltoPalo Alto 94301Santa Clara County
Estimated valuepricier than$4,905,07338% of homes56% of homes96% of homes
Price per ft²pricier than$240370% of homes76% of homesalmost all homes
Living areabigger than2,041 ft²33% of homes45% of homes70% of homes
Lot sizebigger than4,000 ft²4% of homes21% of homes24% of homes
Year builtnewer than193133% of homes33% of homes4% of homes

About 143 Lowell Ave

How much is 143 Lowell Ave, Palo Alto, CA worth?

The TopHap Estimate for 143 Lowell Ave, Palo Alto, CA is $4,905,073 as of Sep 24, 2026. The likely range is $4,357,793 to $5,452,353. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 143 Lowell Ave, Palo Alto, CA last sell?

143 Lowell Ave, Palo Alto, CA last sold on Jun 2, 2025 for $4,680,000, according to the county's recorded deed.

How big is 143 Lowell Ave, Palo Alto, CA?

143 Lowell Ave, Palo Alto, CA has 3 bedrooms, 1.5 bathrooms, 2,041 square feet of living space and a 0.09-acre lot.

When was 143 Lowell Ave, Palo Alto, CA built?

143 Lowell Ave, Palo Alto, CA was built in 1931, making it 95 years old. The building has 2 stories.

What schools serve 143 Lowell Ave, Palo Alto, CA?

143 Lowell Ave, Palo Alto, CA is assigned to Palo Alto High School (high), rated A+; Walter Hays Elementary School (elementary), rated A+; Frank S. Greene Jr Middle School (middle), rated A+. All sit in Palo Alto Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 143 Lowell Ave, Palo Alto, CA compare to other homes in Palo Alto 94301?

Among the 5,325 homes in Palo Alto 94301, it is worth more than 56% of them ($4,905,073 against a typical $4,594,329), its price per square foot is higher than 76% of them ($2403 against a typical $2080), it is bigger than 45% of them (2,041 ft² against a typical 2,182 ft²), its lot is bigger than 21% of them (4,000 ft² against a typical 0.15 ac) and it is newer than 33% of them (1931 against a typical 1947). Measured against all of Santa Clara County, it is worth more than 96% 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 143 Lowell Ave, Palo Alto, CA?

The 2025 property tax bill for 143 Lowell Ave, Palo Alto, CA was $43,535. The county assessed it at $1,917,600.

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