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Single Family ResidenceResidential
$1,837,966$985 / 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 88How 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

1800 DIAMOND AVE

SOUTH PASADENA, CA 91030
4
Beds
2
Baths
1,866 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.
0.17 ac
Lot SizeThe size of the land the home sits on, from county records.
1919
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
9
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$1.8M
$1.6M low$2.1M high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,314 (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.$587,982 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$342,692
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$245,290
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$576,454

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.Conventional
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.1925
Lot (acres)The size of the land the home sits on, from county records.0.17
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.Wood Shingle
HeatingThe type of heating system in the home.Central
FireplaceWhether the home has a fireplace, and what kind.Yes
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Detached
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(5)

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

1800 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 89% of homes in Los Angeles County
  • Costs more per square foot than 91% of homes in Los Angeles County
  • Has a smaller lot than 66% of homes in Oneonta Park
  • Older than 96% 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
$648K$4.1M

This home is worth more than 62% 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$1,837,966
CheaperTypical $1,635,366Pricier

Pricier than 62% of homes nearby

Price per ft²$985
CheaperTypical $879Pricier

Pricier than 73% of homes nearby

Living area1,866 ft²
SmallerTypical 1,908 ft²Bigger

Bigger than 49% of homes nearby

Lot size0.17 ac
SmallerTypical 0.21 acBigger

Bigger than 34% of homes nearby

Year built1919
OlderTypical 1947Newer

Newer than 19% of homes nearby

How 1800 Diamond Ave ranks against every home in each area.
MeasureThis homeOneonta ParkSouth Pasadena 91030Los Angeles County
Estimated valuepricier than$1,837,96665% of homes62% of homes89% of homes
Price per ft²pricier than$98578% of homes73% of homes91% of homes
Living areabigger than1,866 ft²48% of homes49% of homes64% of homes
Lot sizebigger than0.17 ac34% of homes34% of homes54% of homes
Year builtnewer than191919% of homes19% of homes4% of homes

About 1800 Diamond Ave

How much is 1800 Diamond Ave, South Pasadena, CA worth?

The TopHap Estimate for 1800 Diamond Ave, South Pasadena, CA is $1,837,966 as of Sep 24, 2026. The likely range is $1,611,357 to $2,064,575. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 1800 Diamond Ave, South Pasadena, CA last sell?

1800 Diamond Ave, South Pasadena, CA last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 1800 Diamond Ave, South Pasadena, CA?

1800 Diamond Ave, South Pasadena, CA has 4 bedrooms, 2 bathrooms, 1,866 square feet of living space and a 0.17-acre lot.

When was 1800 Diamond Ave, South Pasadena, CA built?

1800 Diamond Ave, South Pasadena, CA was built in 1919, making it 107 years old. It is a conventional home. The building has 2 stories.

What schools serve 1800 Diamond Ave, South Pasadena, CA?

1800 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 1800 Diamond Ave, South Pasadena, CA compare to other homes in South Pasadena 91030?

Among the 6,485 homes in South Pasadena 91030, it is worth more than 62% of them ($1,837,966 against a typical $1,635,366), its price per square foot is higher than 73% of them ($985 against a typical $879), it is bigger than 49% of them (1,866 ft² against a typical 1,908 ft²), its lot is bigger than 34% of them (0.17 ac against a typical 0.21 ac) and it is newer than 19% of them (1919 against a typical 1947). Measured against all of Los Angeles County, it is worth more than 89% 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 1800 Diamond Ave, South Pasadena, CA?

The 2025 property tax bill for 1800 Diamond Ave, South Pasadena, CA was $7,314. The county assessed it at $587,982.

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Assigned schools

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