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Duplex (2 Units, Any Combination)Residential
Last sold for $412,000 on May 14, 2013

531 DIAMOND ST

MONROVIA, CA 91016
2
Beds
2
Baths
1,109 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.
0.15 ac
Lot SizeThe size of the land the home sits on, from county records.
1948
Year BuiltThe year the home was originally built, according to county records.

Valuation

Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$412,000 · May 14, 2013

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,267 (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.$517,482 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$427,053
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$90,429
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$507,336

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.9 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.minimal

Scores 0–100; higher = greater projected risk.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Duplex (2 Units, Any Combination)
StyleThe architectural style of the home, such as ranch or colonial.Duplex Single
CountyLOS ANGELES
Lot (acres)The size of the land the home sits on, from county records.0.15
ConstructionThe main material the home's frame and walls are built from.Wood (Unspecified)
CoolingThe type of cooling or air conditioning in the home.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(10)

Sales and refinances filed with the county for this home. Not every transfer is a normal sale, so check the type before comparing prices.

Foreclosure Filings(3)

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

M
Santa Fe Computer Science Magnet SchoolB-
Middle · Grades 6–8 · 0.5 mi
H
Monrovia High SchoolB+
High · Grades 9–12 · 0.8 mi
E
Plymouth Elementary SchoolA-
Elementary · Grades KG–5 · 1.4 mi

District: Monrovia Unified School District

Neighborhood · ZIP 91016These 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.97
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.104
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.694

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.27%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.8.8%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.7%
PopulationHow many people live in this area.41,126
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,298 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$91,319
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$114,406
Average tempThe average temperature here across a full year.61°F
Annual precipHow much rain and melted snow falls here in a typical year.32 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

531 Diamond 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.

  • Smaller than 82% of homes in Monrovia 91016
  • Has a smaller lot than 78% of homes in Monrovia 91016
  • Older than 72% of homes in Los Angeles County

How it measures up in Monrovia 91016

The dot is this home. The mark in the middle is the typical home in Monrovia 91016.

Living area1,109 ft²
SmallerTypical 1,552 ft²Bigger

Bigger than 18% of homes nearby

Lot size0.15 ac
SmallerTypical 0.18 acBigger

Bigger than 22% of homes nearby

Year built1948
OlderTypical 1951Newer

Newer than 41% of homes nearby

How 531 Diamond St ranks against every home in each area.
MeasureThis homeMonrovia 91016Los Angeles County
Living areabigger than1,109 ft²18% of homes18% of homes
Lot sizebigger than0.15 ac22% of homes35% of homes
Year builtnewer than194841% of homes28% of homes

About 531 Diamond St

When did 531 Diamond St, Monrovia, CA last sell?

531 Diamond St, Monrovia, CA last sold on May 14, 2013 for $412,000, according to the county's recorded deed. TopHap holds 5 recorded sales for this parcel.

How big is 531 Diamond St, Monrovia, CA?

531 Diamond St, Monrovia, CA has 2 bedrooms, 2 bathrooms, 1,109 square feet of living space and a 0.15-acre lot.

When was 531 Diamond St, Monrovia, CA built?

531 Diamond St, Monrovia, CA was built in 1948, making it 78 years old. It is a duplex single home.

What schools serve 531 Diamond St, Monrovia, CA?

531 Diamond St, Monrovia, CA is assigned to Santa Fe Computer Science Magnet School (middle), rated B-; Monrovia High School (high), rated B+; Plymouth Elementary School (elementary), rated A-. All sit in Monrovia Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 531 Diamond St, Monrovia, CA compare to other homes in Monrovia 91016?

Among the 10,399 homes in Monrovia 91016, it is bigger than 18% of them (1,109 ft² against a typical 1,552 ft²), its lot is bigger than 22% of them (0.15 ac against a typical 0.18 ac) and it is newer than 41% of them (1948 against a typical 1951). These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 531 Diamond St, Monrovia, CA?

The 2025 property tax bill for 531 Diamond St, Monrovia, CA was $7,267. The county assessed it at $517,482.

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