Google street view image for 521 Deep Hill Rd, Diamond Bar, CA 91765

OFF MARKET

$844,614

•

2 ba

•

1,260

sq ft

521 Deep Hill Rd, Diamond Bar, CA 91765

About this home

521 Deep Hill Rd is a 1,260 square foot house on a 8,688 square foot lot with 3 bedrooms and 2 bathrooms. Based on Redfin's Diamond Bar data, we estimate the home's value is $844,614.

Single-familyProperty Type

1976Year Built

8,688 sq ftLot Size

$670Est. Price/Sq.Ft.

Source:Public Records

Redfin Estimate

$844,614

$6,000 since August

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 3.9% lower than the average sale price ($879K) of 6 comparable homes.

SOLD MAY 27, 2026
$900,000
A
3 beds2 baths1,553 sq ft
312 N Prospectors, Diamond Bar, CA 91765
SOLD SEP 2, 2026
$825,000
B
4 beds2 baths1,489 sq ft
105 N Palo Cedro, Diamond Bar, CA 91765
SOLD DEC 17, 2025
$795,000
C
3 beds2 baths1,260 sq ft
22704 Dry Crk, Diamond Bar, CA 91765
SOLD JUL 17, 2026
$920,000
D
3 beds2 baths1,272 sq ft
435 Navajo Spgs, Diamond Bar, CA 91765
Equity Union
SOLD JUN 9, 2026
$891,000
E
4 beds2 baths1,577 sq ft
353 S Rock River Rd, Diamond Bar, CA 91765
SOLD JUL 24, 2026
$945,000
F
4 beds2 baths1,503 sq ft
23905 Cholame, Diamond Bar, CA 91765

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Earn from this home

Sell

$797,767

Est. take-home

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Rent

$2,892/mo

Redfin rental estimate

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Market trends in 91765, CA

Last updated August 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-List Price

98.5%

0.6% MoM

Median sale price

$1.1M

$10K MoM

Avg. days on market

43d

1 days MoM

Recently sold homes

100

5 MoM

New listings for sale

$6,500,000
8 beds11 baths14,119 sq ft
2955 Wagon Train, Diamond Bar, CA 91765
Alt Financial Network Inc
$1,678,000
4 beds3.5 baths3,164 sq ft
20508 Crestline Dr, Diamond Bar, CA 91765
OPEN SAT, 1PM TO 4PM
$1,230,000
4 beds3 baths2,148 sq ft
2437 Harmony Hl, Diamond Bar, CA 91765
$579,000
2 beds2.5 baths1,241 sq ft
23721 Highland Valley Rd, Diamond Bar, CA 91765
$769,000
3 beds3 baths1,485 sq ft
23001 Paseo De Terrado, Diamond Bar, CA 91765
COMING SOON
$1,363,000
4 beds5 baths2,430 sq ft
883 Terrace W, Pomona, CA 91765
$1,149,000
6 beds3 baths1,300 sq ft
2646 Castle Rock Rd, Diamond Bar, CA 91765
$1,888,888
4 beds3 baths3,406 sq ft
23600 Ridge Line, Diamond Bar, CA 91765
$620,000
3 beds3 baths1,420 sq ft
430 Golden Springs Dr Unit B, Diamond Bar, CA 91765
$375,000
2 beds2 baths980 sq ft
318 S Prospectors #44, Diamond Bar, CA 91765
Century 21 Masters
See all

Provided by Redfin

Sale history for 521 Deep Hill Rd

As the MLS and public records start to fill up, we'll list the details here.

Year

Property tax

Land + Additions

Assessment*

2025

$4,045 (+9.6%)

$132,010 + $131,673

$263,683

2024

$3,690 (+1.9%)

$132,010 + $131,673

$263,683

2023

$3,622 (+1.6%)

$129,422 + $129,092

$258,514

2022

$3,563 (+2.3%)

$126,885 + $126,561

$253,446

2021

$3,483 (+0.4%)

$124,398 + $124,080

$248,478

2020

$3,470 (−2.2%)

$121,959 + $121,648

$243,607

2019

$3,547 (+8.6%)

$120,709 + $120,401

$241,110

2018

$3,267 (+1.8%)

$118,343 + $118,041

$236,384

2017

$3,210 (+4.6%)

$113,749 + $113,458

$227,207

2016

$3,068 (+0.8%)

$113,749 + $113,458

$227,207

2015

$3,043 (+0.5%)

$111,519 + $111,234

$222,753

2014

$3,028 (+0.8%)

$107,693 + $107,418

$215,111

2012

$3,003 (+3.1%)

$107,207 + $106,933

$214,140

2011

$2,913 (+0.7%)

$105,105 + $104,837

$209,942

2010

$2,893 (+2.8%)

$103,045 + $102,782

$205,827

2009

$2,813 (+5.0%)

$102,275 + $102,014

$204,289

2008

$2,680

$102,518 + $102,257

$204,775

Tax history for 521 Deep Hill Rd

Year

Property tax

Land + Additions

Assessment*

2025

$4,045 (+9.6%)

$132,010 + $131,673

$263,683

2024

$3,690 (+1.9%)

$132,010 + $131,673

$263,683

2023

$3,622 (+1.6%)

$129,422 + $129,092

$258,514

2022

$3,563 (+2.3%)

$126,885 + $126,561

$253,446

2021

$3,483 (+0.4%)

$124,398 + $124,080

$248,478

2020

$3,470 (−2.2%)

$121,959 + $121,648

$243,607

2019

$3,547 (+8.6%)

$120,709 + $120,401

$241,110

2018

$3,267 (+1.8%)

$118,343 + $118,041

$236,384

2017

$3,210 (+4.6%)

$113,749 + $113,458

$227,207

2016

$3,068 (+0.8%)

$113,749 + $113,458

$227,207

2015

$3,043 (+0.5%)

$111,519 + $111,234

$222,753

2014

$3,028 (+0.8%)

$107,693 + $107,418

$215,111

2012

$3,003 (+3.1%)

$107,207 + $106,933

$214,140

2011

$2,913 (+0.7%)

$105,105 + $104,837

$209,942

2010

$2,893 (+2.8%)

$103,045 + $102,782

$205,827

2009

$2,813 (+5.0%)

$102,275 + $102,014

$204,289

2008

$2,680

$102,518 + $102,257

$204,775

*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.

Zoning

RLM

Low/Medium Density Residential District

The RLM zoning district is intended primarily for existing subdivided areas developed with detached single-family dwellings. The maximum allowed density for new residential subdivisions within this zoning district will be five dwellings per gross acre. The RLM zoning district is consistent with the low density residential land use category of the general plan.

Permitted uses

Include but are not limited to:

Housing-Single unit
Housing-Senior
Housing-Other
Infrastructure
Fire house
Police station
Park & open space

Property details

Interior

Heating & Cooling
Heating Type: Central

Exterior

Property Information
Subdivision Name: 28065
Living Sq. Ft: 1,260
# of Units: 1
Legal Description: TRACT NO 28065 LOT 15

Lot Information
# of Buildings: 1
Land Sq. Ft: 8,688
Legal Lot Number: 15
Municipality Name: DIAMOND BAR
Acres: 0.1994
Depth Footage: 143
Front Footage: 60
Zoning Code: LCR18000*
County Use Description: SINGLE FAMILY RESID

Utility Information
Water Service Type: Public

Financial

Assessor Information
Assessment Year: 2025

Public facts

Beds: 3
Baths: 2.0
Sq. Ft.: 1,260
Stories: —
Lot Size: 8,688 square feet
Style: Single Family Residential
Year Built: 1976
Year Renovated: 1976
County: Los Angeles County
APN: 8718020009

Home facts updated by county records on Aug 30, 2026

Around this home

Schools

Armstrong Elementary School

Public K-6 • Assigned • 0.6mi

5/10

Lorbeer Middle School

Public 7-8 • Assigned • 1.0mi

5/10

Diamond Ranch High School

Public 9-12 • Assigned • 2.4mi

8/10

Provided by GreatSchools

Lifestyle

Provided by Walk Score and Local Logic

Climate risks

1/10 Flood Factor

Minimal risk of a flood reaching the building in the next 30 years

3/10 Fire Factor

0.15% chance of being in a wildfire in next 30 years

7/10 Heat Factor

7 days above 99° expected this year, 21 days in 30 years

1/10 Wind Factor

Minimal risk of severe winds over next 30 years

6/10 Air Factor

10 unhealthy days expected this year, 13 days in 30 years

Provided by First Street

Historical weather

Diamond Bar, CA • 91765

Average low and high temperatures (°F)

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Sun exposure

In this area, properties receive around 10.1 hours in June and 6.8 hours in December, placing it above the U.S. average for solar exposure.

10.1 hrs

6.8 hrs

JuneDecember

Provided by Shadowmap

Estimated sale price

$803,000 – $972,000

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$1,888,888

4 beds3 baths3,406 sq ft

23600 Ridge Line, Diamond Bar, CA 91765

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3 beds3 baths1,420 sq ft

430 Golden Springs Dr Unit B, Diamond Bar, CA 91765

Home values near 521 Deep Hill Rd

Data from public records.

Address	Redfin Estimate
531 Deep Hill Road, Diamond Bar, CA 3 Beds \| 2 Baths \| 1260 Sq. Ft.	$948,307
509 Deep Hill Road, Diamond Bar, CA 3 Beds \| 2 Baths \| 1260 Sq. Ft.	$813,950

Address	Redfin Estimate
527 Deep Hill Road, Diamond Bar, CA 3 Beds \| 2 Baths \| 1449 Sq. Ft.	$959,660
503 Deep Hill Road, Diamond Bar, CA 3 Beds \| 2 Baths \| 1553 Sq. Ft.	$884,392

Address	Redfin Estimate
515 Deep Hill Road, Diamond Bar, CA 3 Beds \| 2 Baths \| 1553 Sq. Ft.	$881,764
453 Deep Hill Road, Diamond Bar, CA 3 Beds \| 2 Baths \| 1260 Sq. Ft.	$745,517

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