Diamond Bar
Property Data

Los Angeles County, California

Explore accurate parcel and ownership records,
directly sourced from county assessors.

Los Angeles County

ZIP Codesby Total Population

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Total Population
44,50244,502

DistributionTotal Population

No data available

Demographics

Total Population

44,502

Median Age

46.0

Population Under 18

18.5%

Population 65+

21.9%

Total Households

15,233

Average Household Size

2.91

Diamond Bar, CA housing and demographic statistics

ZIP/ZCTA areas can cross city and county boundaries. Each row describes its ZIP/ZCTA area, not the city as a whole. These values are not combined into a city estimate.

Individual ZIP/ZCTA estimates associated with Diamond Bar, CA
ZIP/ZCTAPopulationMedian household incomeMedian monthly gross rentOwner-occupied share
9176544,502$105,565$2,48677.5%

Source: U.S. Census Bureau American Community Survey (ACS), 2020–2024 five-year estimates, via Realie. Measurement period: –. Published by the Census Bureau on ; published by Realie on . These are five-year estimates, not a measurement of current conditions. — indicates unavailable or suppressed data.

Area property statistics

Recorded property characteristics and residential parcel-sale records for Diamond Bar, CA. Sale amounts describe recorded transfers, not asking prices or appraisals. Each measure uses records with that information available.

Sale records use the AVM's residential, amount, floor-area, year-built, price-per-area, deed, buyer-relationship and distress filters. Known multi-parcel deals are also excluded. Unknown package flags are not proof of a single-parcel sale. Counts represent eligible parcel sale records. Recorded annual averages require at least 10 eligible sales. Projections must have enough history and pass checks against earlier recorded sales. Recent sales can be underreported; different coverage between years can affect the changes.

City measurements cover the selected county's portion of the city.

Annual sales comparison

Calendar 2025 recorded sales versus calendar 2026 model projections. Both years cover January 1–December 31. Change compares the 2026 projection with the recorded 2025 value. Annual average amounts weight each month by its sales count; they are not monthly medians.

Calendar-year sales comparison
Metric20252026 projectedChange (%)
Residential sale records417Recorded345Model estimateRange: 310–400-17.3%
Average recorded sale amount$1,063,922Recorded$1,229,732Model estimate+15.6%

Projections are not confirmed transactions or property valuations. Recent sales can be underreported; different coverage between years can affect the change. Unsupported values remain unavailable. Ranges reflect historical model errors, not confidence intervals. Annual comparison calculated . Assumed observation cutoff: June 2026; not verified completeness.

Recorded property statistics

Reported property statistics for Diamond Bar, CA
MeasureDiamond Bar, CALos Angeles County, CA
Median recorded sale amount$987,500$898,000
Recorded amount, 10th percentile$450,000$488,000
Recorded amount, 90th percentile$1,529,600$2,290,000
Average recorded floor area (sq ft)2,1172,212
Average recorded bedrooms3.53.4
Average recorded bathrooms2.72.5
Median year built19791957
Condominium share of properties25.4%13.7%

Diamond Bar, CA: Recorded median and percentile amounts: May 7, 2025–Oct 28, 2026.

County input file published Oct 27, 2026. Calculated . Published . Dataset last refreshed: .

Los Angeles County, CA: Recorded median and percentile amounts: May 7, 2025–Oct 28, 2026.

County input file published Oct 27, 2026. Calculated . Published . Dataset last refreshed: .

Source: Realie property-record aggregates. Input publication and calculation dates do not establish complete transaction coverage. Missing measures are shown as — or omitted.

Other recent-period estimates

These use different periods from the calendar-year comparison. Estimates extend parcel-record counts and recorded amounts; they are not confirmed current transactions or individual-property values.

Parcel sale records
Oct 1, 2025–Sep 30, 2026
393
Model estimateHistorical error-adjusted range: 372–407.
Median sale amount
September 2026
$1,231,854
Model estimateHistorical error-adjusted range: $1,257,477–$1,618,155.
Median-amount change
September 2026 versus September 2025
+27.3%
Model estimateHistorical error-adjusted range: +29.9%–+67.2%.

Transaction coverage has not been verified. Known multi-parcel deals are excluded; missing package flags do not establish that every remaining sale covers one parcel. Amount change compares monthly record medians, not the appreciation of the same homes. Ranges reflect historical model errors; they are not confidence intervals and can exclude the point estimate. Assumed observation cutoff: June 2026; not a verified completeness date.

Properties in Diamond Bar

Showing page 259 of properties

3742 Castle Rock Road

Diamond Bar, CA 91765

3745 Castle Rock Road

Diamond Bar, CA 91765

3748 Castle Rock Road

Diamond Bar, CA 91765

375 San Leandro Drive

Diamond Bar, CA 91765

377 Covered Wagon Drive

Diamond Bar, CA 91765

378 Ballena Drive

Diamond Bar, CA 91765

378 North Palo Cedro Drive

Diamond Bar, CA 91765

378 North Prospectors Road

Diamond Bar, CA 91765

378 South Rock River Road

Diamond Bar, CA 91765

379 Armitos Place

Diamond Bar, CA 91765

379 South Diamond Bar Boulevard

Diamond Bar, CA 91765

380 Covered Wagon Drive

Diamond Bar, CA 91765

380 North Rock River Drive

Diamond Bar, CA 91765

380 South Prospectors Road Unit 90

Diamond Bar, CA 91765

380 South Prospectors Road Unit 88

Diamond Bar, CA 91765

380 South Prospectors Road Unit 85

Diamond Bar, CA 91765

380 South Prospectors Road Unit 93

Diamond Bar, CA 91765

380 South Prospectors Road Unit 94

Diamond Bar, CA 91765

380 South Prospectors Road Unit 92

Diamond Bar, CA 91765

380 South Prospectors Road Unit 91

Diamond Bar, CA 91765

380 South Prospectors Road Unit 86

Diamond Bar, CA 91765

380 South Prospectors Road Unit 89

Diamond Bar, CA 91765

380 South Prospectors Road Unit 87

Diamond Bar, CA 91765

380 South Prospectors Road Unit 95

Diamond Bar, CA 91765

380 South Prospectors Road Unit 96

Diamond Bar, CA 91765

3802 Castle Rock Road

Diamond Bar, CA 91765

3805 Castle Rock Road

Diamond Bar, CA 91765

3808 Castle Rock Road

Diamond Bar, CA 91765

381 Covered Wagon Drive

Diamond Bar, CA 91765

3814 Castle Rock Road

Diamond Bar, CA 91765

3815 Castle Rock Road

Diamond Bar, CA 91765

3822 Castle Rock Road

Diamond Bar, CA 91765

3825 Castle Rock Road

Diamond Bar, CA 91765

3828 Castle Rock Road

Diamond Bar, CA 91765

383 Covered Wagon Drive

Diamond Bar, CA 91765

3831 Castle Rock Road

Diamond Bar, CA 91765

3836 Castle Rock Road

Diamond Bar, CA 91765

3839 Castle Rock Road

Diamond Bar, CA 91765

384 Ballena Drive

Diamond Bar, CA 91765

384 South Rock River Road

Diamond Bar, CA 91765

3842 Castle Rock Road

Diamond Bar, CA 91765

3848 Castle Rock Road

Diamond Bar, CA 91765

385 Armitos Place

Diamond Bar, CA 91765

385 San Leandro Drive

Diamond Bar, CA 91765

3854 Castle Rock Road

Diamond Bar, CA 91765

388 South Prospectors Road Unit 112

Diamond Bar, CA 91765

388 South Prospectors Road Unit 116

Diamond Bar, CA 91765

388 South Prospectors Road Unit 110

Diamond Bar, CA 91765

388 South Prospectors Road Unit 119

Diamond Bar, CA 91765

388 South Prospectors Road Unit 117

Diamond Bar, CA 91765

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