23303 Ridge Line Rd, Diamond Bar, CA 91765

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Off market oct 2012 for $1.1M

$2,388,961

Est. refi paymentEst. refi $8,117/mo

•

5,505

sq ft

23303 Ridge Line Rd, Diamond Bar, CA 91765

About this home

Views- Views- Views!!! Breathtaking panoramic mountains views and city lights views. Living in the prestigious community "The Country Estates of Diamond Bar" is where you find this custom ranch style masterpiece. This beautiful home has plenty of detail and professional craftsmanship in every way using the very finest of woods, huge living and entertaining areas, lush carpets, and textures to compliment the fixtures and hardware. This home boasts approximately 5,505 sq. ft. of living space on a 1.65 acre parcel with breathtaking panoramic, unobstructed views. A few amenities of this 5 bedroom, 4.5 bathroom estate are: gourmet country kitchen ~ huge game/entertainment room ~ 3 fireplaces ~ high ceilings ~ hardwood flooring ~ spacious guest rooms ~ wine cellar ~ French Doors and plenty of natural sunshine. Four of the five bedrooms have private balconies and there are 2 custom wet bars; this home is truly an entertainers dream house. This immaculate residence has unique finishes and personal touches that you would absolutely love. Come see it before it’s gone…

Single-familyProperty Type

1980Year Built

1.65 acresLot Size

$434Est. Price/Sq.Ft.

3 car garageParking

Listed by Frank Del Rio •DRE #01321550 • Prudential California Realty

Bought with Lina LEE •DRE #00849382 • SOUTHLAND REALTY CO.

Redfin checked: a minute ago

•Source:CRMLS #H12109393

Redfin Estimate

$2,388,961

$1.2M since sold in October 2012$125K since September

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 17.3% higher than the average sale price ($2.04M) of 6 comparable homes.

SOLD APR 30, 2026
$2,900,000
A
5 beds6 baths6,078 sq ft
23615 Falcons View Dr, Diamond Bar, CA 91765
RE/MAX Galaxy
SOLD MAY 27, 2026
$1,455,000
B
5 beds3 baths2,655 sq ft
1554 Deerfoot, Diamond Bar, CA 91765
SOLD SEP 24, 2026
$1,450,000
C
5 beds3 baths2,806 sq ft
1590 Deer Crossing Dr, Diamond Bar, CA 91765
Re/Max Premier Properties
SOLD JUL 23, 2026
$1,980,000
D
5 beds4 baths4,642 sq ft
22517 Lazy Mdw, Diamond Bar, CA 91765
SOLD SEP 4, 2026
$1,640,000
E
5 beds3 baths2,842 sq ft
1566 Autumn Hl, Diamond Bar, CA 91765
SOLD DEC 9, 2025
$2,790,000
F
5 beds5 baths4,809 sq ft
22536 Ridge Line Rd, Diamond Bar, CA 91765

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Earn from this home

Sell

$1,616,487

Est. take-home

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Refinance

Est. cash available

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Rent

$5,300/mo

Redfin rental estimate

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Market trends in 91765, CA

Last updated September 2026

Buyer's Market

Seller's Market

Balanced 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

8 MoM

New listings for sale

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K.W. EXECUTIVE
$4,000,000
6 beds5 baths5,797 sq ft
1809 Diamond Knl, Diamond Bar, CA 91765
$1,480,000
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$1,170,000
4 beds2.5 baths2,154 sq ft
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$1,200,000
3 beds2 baths1,339 sq ft
512 Armitos Pl, Diamond Bar, CA 91765
OPEN SAT, 2PM TO 5PM
$1,499,900
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$468,000
2 beds2.5 baths1,056 sq ft
22871 Hilton Head Dr #230, Diamond Bar, CA 91765
OPEN SAT, 11AM TO 3PM
$1,363,000
4 beds5 baths2,430 sq ft
883 Terrace W, Pomona, CA 91765
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See all

Provided by Redfin

Sale history for 23303 Ridge Line Rd

Date

Event

Price

CRMLS #TR18023364

Feb 3, 2018

Listed

$2,180,000

$396/sq ft

CRMLS #H12109393

Oct 19, 2012

Sold

$1,189,000

$216/sq ft

Sep 20, 2012

Pending

—

Aug 31, 2012

Listed

$1,250,000

$227/sq ft

CRMLS #H12073674

Aug 30, 2012

Listing Removed

—

Jun 12, 2012

Listed

$1,350,000

$245/sq ft

CRMLS #H12051972

Jun 11, 2012

Listing Removed

—

Apr 24, 2012

Listed

$1,500,000

$272/sq ft

CRMLS #H11083151

Jan 27, 2012

Listing Removed

—

Jun 29, 2011

Listed

$1,690,000

$307/sq ft

Public Records

Jun 16, 1988

Sold

$610,000

$111/sq ft

Public Records

Jul 31, 1986

Sold

$560,000

$102/sq ft

Year

Property tax

Land + Additions

Assessment*

2025

$18,749 (+5.8%)

$604,786 + $888,654

$1,493,440

2024

$17,726 (+2.7%)

$592,928 + $871,230

$1,464,158

2023

$17,255 (+2.4%)

$581,302 + $854,148

$1,435,450

2022

$16,854 (+1.9%)

$569,904 + $837,400

$1,407,304

2021

$16,532 (+1.3%)

$558,730 + $820,981

$1,379,711

2020

$16,321 (+1.9%)

$547,775 + $804,884

$1,352,659

2019

$16,010 (+4.0%)

$542,159 + $796,631

$1,338,790

2018

$15,389 (+4.8%)

$531,529 + $781,011

$1,312,540

2017

$14,685 (+3.2%)

$510,890 + $750,685

$1,261,575

2016

$14,231 (−0.6%)

$510,890 + $750,685

$1,261,575

2015

$14,321 (−0.4%)

$500,873 + $735,966

$1,236,839

2014

$14,373 (+19.8%)

$483,686 + $710,712

$1,194,398

2012

$11,996 (+2.9%)

$481,500 + $707,500

$1,189,000

2011

$11,658 (+0.7%)

$388,890 + $583,343

$972,233

2010

$11,576 (+0.2%)

$381,265 + $571,905

$953,170

2009

$11,554 (+2.6%)

$378,416 + $567,631

$946,047

2008

$11,262

$379,315 + $568,980

$948,295

Tax history for 23303 Ridge Line Rd

Year

Property tax

Land + Additions

Assessment*

2025

$18,749 (+5.8%)

$604,786 + $888,654

$1,493,440

2024

$17,726 (+2.7%)

$592,928 + $871,230

$1,464,158

2023

$17,255 (+2.4%)

$581,302 + $854,148

$1,435,450

2022

$16,854 (+1.9%)

$569,904 + $837,400

$1,407,304

2021

$16,532 (+1.3%)

$558,730 + $820,981

$1,379,711

2020

$16,321 (+1.9%)

$547,775 + $804,884

$1,352,659

2019

$16,010 (+4.0%)

$542,159 + $796,631

$1,338,790

2018

$15,389 (+4.8%)

$531,529 + $781,011

$1,312,540

2017

$14,685 (+3.2%)

$510,890 + $750,685

$1,261,575

2016

$14,231 (−0.6%)

$510,890 + $750,685

$1,261,575

2015

$14,321 (−0.4%)

$500,873 + $735,966

$1,236,839

2014

$14,373 (+19.8%)

$483,686 + $710,712

$1,194,398

2012

$11,996 (+2.9%)

$481,500 + $707,500

$1,189,000

2011

$11,658 (+0.7%)

$388,890 + $583,343

$972,233

2010

$11,576 (+0.2%)

$381,265 + $571,905

$953,170

2009

$11,554 (+2.6%)

$378,416 + $567,631

$946,047

2008

$11,262

$379,315 + $568,980

$948,295

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

Public record

Public record
Zoning

Beds

Baths

Stories

—

Lot width

—

Lot depth

—

Lot size

1.67 Acres

Year renovated

1980

Sq. Ft.

5,505

Year built

1980

Style

Single Family Residential

County

Los Angeles County

APN

8713005018

Parking Spaces

—

Basement

—

Accessible

—

HOA Dues

—

Garage

—

Features

—

Last updated by owner on Oct 7, 2026.

Rural Residential District

The RR zoning district identifies hillside areas intended for rural living, including the keeping of animals, with supporting accessory structures. The maximum allowed density for new residential subdivisions within this zoning district will be one dwelling unit per gross acre, or lower densities where required by chapter 22.22 (Hillside Management). The RR zoning district is consistent with the rural residential land use category of the general plan.

Permitted uses

Include but are not limited to:

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

Property details

Parking

Parking / Garage Information
Attached Garage
# of Garage Spaces: 3

Interior

Laundry Information
Has Laundry
Individual Room

Kitchen Information
Appliances: Barbecue, Built-In, Counter Top, Double Oven, Dishwasher, Gas Cooking, Garbage Disposal, Grill, Stove, Trash Compactor
Has Appliances
Breakfast Counter / Bar, Formal Dining Room, In Kitchen

Bathroom Information
# of Baths (Full): 4
# of Baths (1/2): 1

Cooling Information
Central
Has Cooling

Room Information
Family Room, Guest/Maid's Quarters, Jack & Jill, Library, Living Room, Primary Bedroom, Walk-In Closet, Wine Cellar

Fireplace Information
Family Room, Game Room, Gas, Living Room
Has Fireplace

Flooring Information
Carpet, Tile, Wood

Heating Information
Central Furnace
Has Heating

Interior Features
Bar, Tile Counters
Levels: Three Or More
Security Features: 24 Hour Security, Gated Community, Gated with Guard, Guarded
Spa Features: Association
Has Spa
Window Features: Blinds, Drapes/Curtains

Exterior

Exterior Information
Roof: Tile
Fencing: Vinyl
Has Fence
Construction Materials: Brick, Hardboard, Stucco

Exterior Features
Barbecue Private
Patio And Porch Features: Deck, Wood
Has Patio
Pool Features: Community Pool
Has Pool
Has Sprinklers

Lot Information
Lot Size Source: Assessor's Data
Lot Features: Front Yard, Lawn, Level with Street, Sprinklers In Front, Sprinklers On Side, Yard

Property Information
Living Area Source: Assessor's Data
Parcel Number: 8713005018
Has View
Year Built Source: Assessor

Financial

Assesments Information
Assessments: Unknown

Utilities

Utilities Information
Water Source: District/Public

Location

Homeowners Association
Association Name: DBCEA
Association Fee: $205
Association Fee Frequency: Monthly
Association Amenities: Barbecue, Biking Trails, Club House, Controlled Access, Guard, Hiking Trails, Horse Trails, Meeting Room, Outdoor Cooking Area, Picnic Area, Playground, Pool, Security, Spa, Sport Court, Tennis

School Information
High School District: Walnut Valley Unified

Location Information
Latitude: 33.98957800
Longitude: -117.81346100
Other Subdivision Name: Diamond Bar Country Estates

Public facts

Beds: 5
Baths: 5.0
Sq. Ft.: 5,505
Stories: —
Lot Size: 1.67 acres
Style: Single Family Residential
Year Built: 1980
Year Renovated: 1980
County: Los Angeles County
APN: 8713005018

Home facts updated by county records on Oct 7, 2026

Other

Listing Information
Days Active in MLS: 50
Continuous Days Active in MLS: 340

Listing Agent Information
List Agent First Name: Frank
List Agent Last Name: Del Rio

Listing Office Information
List Office Name: Prudential California Realty

Selling Agent Information
Buyer Agent First Name: Lina
Buyer Agent Last Name: To

Selling Office Information
Buyer Office Name: Southland Realty Co.

Around this home

Schools

Evergreen Elementary School

Public K-5 • Assigned • 1.4mi

9/10

Chaparral Middle School

Public 6-8 • Assigned • 0.5mi

10/10

Diamond Bar High School

Public 9-12 • Assigned • 1.6mi

10/10

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

5/10 Fire Factor

4% chance of being in a wildfire in next 30 years

5/10 Heat Factor

2 days above 98° expected this year, 5 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 9.7 hours in June and 6.9 hours in December, placing it above the U.S. average for solar exposure.

9.7 hrs

6.9 hrs

JuneDecember

Provided by Shadowmap

Estimated sale price

$2.27M – $2.75M

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New listings for sale in 91765

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FOR SALE BY OWNER

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OPEN SAT, 2PM TO 5PM

$1,499,900

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24215 Delta Dr, Diamond Bar, CA 91765

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OPEN SAT, 11AM TO 3PM

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Home values near 23303 Ridge Line Rd

Data from public records.

Address	Redfin Estimate
23421 Ridge Line Road, Diamond Bar, CA 4 Beds \| 2.5 Baths \| 3366 Sq. Ft.	$1,563,618
23317 Ridge Line Road, Diamond Bar, CA 5 Beds \| 4 Baths \| 4542 Sq. Ft.	$3,184,663

Address	Redfin Estimate
23223 Ridge Line Road, Diamond Bar, CA 4 Beds \| - Baths \| 3079 Sq. Ft.	$1,942,407
23347 Ridge Line Road, Diamond Bar, CA 5 Beds \| 4 Baths \| 5642 Sq. Ft.	$2,252,565

Address	Redfin Estimate
23235 Ridge Line Road, Diamond Bar, CA 4 Beds \| 4 Baths \| 4046 Sq. Ft.	$1,760,313
23411 Ridge Line Road, Diamond Bar, CA 3 Beds \| 2 Baths \| 2196 Sq. Ft.	$1,476,347

Property information provided by CRMLS when last listed in 2012. This data may not match . Learn more.

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