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Single Family ResidenceResidential
$2,782,069$859 / 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 Aug 30, 2026
Last sold for $2,500,000 on May 24, 2018

1820 DIAMOND AVE

SOUTH PASADENA, CA 91030
4
Beds
3
Baths
3,238 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.
0.21 ac
Lot SizeThe size of the land the home sits on, from county records.
1925
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.

Valuation

$2.8M
$2.5M low$3.1M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$2,500,000 · May 24, 2018

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$32,472 (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.$2,901,458 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$1,574,099
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$1,327,359
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$2,844,568

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.Spanish
CountyLOS ANGELES
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.1961
Lot (acres)The size of the land the home sits on, from county records.0.21
ConstructionThe main material the home's frame and walls are built from.Wood (Unspecified)
RoofThe main material covering the roof, such as asphalt shingle or tile.Tile
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.Yes

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.

H
South Pasadena High SchoolA+
High · Grades 9–12 · 0.3 mi
M
South Pasadena Middle SchoolA+
Middle · Grades 6–8 · 0.4 mi
E
Arroyo Vista Elementary SchoolA
Elementary · Grades KG–5 · 0.9 mi

District: South Pasadena Unified School District

Neighborhood · ZIP 91030These 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.83
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.110
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.460

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.35%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.6%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.9%
PopulationHow many people live in this area.26,335
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.7,682 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$124,668
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$168,895
Average tempThe average temperature here across a full year.65°F
Annual precipHow much rain and melted snow falls here in a typical year.19 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

1820 Diamond 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 95% of homes in Los Angeles County
  • Costs more per square foot than 86% of homes in Los Angeles County
  • Bigger than 90% of homes in Los Angeles County
  • Has a bigger lot than 67% of homes in Los Angeles County
  • Older than 90% of homes in Los Angeles County

What homes are worth in South Pasadena 91030

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

This home
$629K$4.1M

This home is worth more than 91% of homes in South Pasadena 91030.

How it measures up in South Pasadena 91030

The dot is this home. The mark in the middle is the typical home in South Pasadena 91030.

Estimated value$2,782,069
CheaperTypical $1,604,524Pricier

Pricier than 91% of homes nearby

Price per ft²$859
CheaperTypical $872Pricier

Pricier than 47% of homes nearby

Living area3,238 ft²
SmallerTypical 1,910 ft²Bigger

Bigger than 86% of homes nearby

Lot size0.21 ac
SmallerTypical 0.21 acBigger

Bigger than 52% of homes nearby

Year built1925
OlderTypical 1946Newer

Newer than 36% of homes nearby

How 1820 Diamond Ave ranks against every home in each area.
MeasureThis homeOneonta ParkSouth Pasadena 91030Los Angeles County
Estimated valuepricier than$2,782,06991% of homes91% of homes95% of homes
Price per ft²pricier than$85943% of homes47% of homes86% of homes
Living areabigger than3,238 ft²85% of homes86% of homes90% of homes
Lot sizebigger than0.21 ac57% of homes52% of homes67% of homes
Year builtnewer than192546% of homes36% of homes10% of homes

About 1820 Diamond Ave

How much is 1820 Diamond Ave, South Pasadena, CA worth?

The TopHap Estimate for 1820 Diamond Ave, South Pasadena, CA is $2,782,069 as of Aug 30, 2026. The likely range is $2,472,596 to $3,091,542. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 1820 Diamond Ave, South Pasadena, CA last sell?

1820 Diamond Ave, South Pasadena, CA last sold on May 24, 2018 for $2,500,000, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 1820 Diamond Ave, South Pasadena, CA?

1820 Diamond Ave, South Pasadena, CA has 4 bedrooms, 3 bathrooms, 3,238 square feet of living space and a 0.21-acre lot.

When was 1820 Diamond Ave, South Pasadena, CA built?

1820 Diamond Ave, South Pasadena, CA was built in 1925, making it 101 years old. It is a spanish home. The building has 1 story.

What schools serve 1820 Diamond Ave, South Pasadena, CA?

1820 Diamond Ave, South Pasadena, CA is assigned to South Pasadena High School (high), rated A+; South Pasadena Middle School (middle), rated A+; Arroyo Vista Elementary School (elementary), rated A. All sit in South Pasadena Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 1820 Diamond Ave, South Pasadena, CA compare to other homes in South Pasadena 91030?

Among the 6,479 homes in South Pasadena 91030, it is worth more than 91% of them ($2,782,069 against a typical $1,604,524), its price per square foot is higher than 47% of them ($859 against a typical $872), it is bigger than 86% of them (3,238 ft² against a typical 1,910 ft²), its lot is bigger than 52% of them (0.21 ac against a typical 0.21 ac) and it is newer than 36% of them (1925 against a typical 1946). Measured against all of Los Angeles County, it is worth more than 95% 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 1820 Diamond Ave, South Pasadena, CA?

The 2025 property tax bill for 1820 Diamond Ave, South Pasadena, CA was $32,472. The county assessed it at $2,901,458.

More homes on Diamond Ave

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Assigned schools

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