Listed by ALLEN SHI •DRE #02045433 • Wetrust Realty

Contact: 626-202-8703

Pending

$1,460,000

Est. $9,534/mo —

•

2,712

sq ft

21504 Cold Spring Ln, Diamond Bar, CA 91765

About this home

PAID OFF Solar System with 32 Panasonic Panels. Two Tesla EV charging stations, 2025 AO Smith electric water heater, a whole-house water softener system, newer roof, and newer A/C. Enjoy beautiful mountain views by day and sparkling city lights by night from this lovely home nestled in the desirable hills of Diamond Bar, complete with a private pool perfect for relaxing or entertaining. The bright and airy layout features soaring high ceilings in the living room, abundant natural light, a desirable downstairs bedroom, and a spacious 3-car garage. Located within the award-winning Walnut Valley Unified School District with top-rated 10/10 schools, and just minutes from Diamond Hills Plaza featuring H Mart, popular dining, shopping, and everyday conveniences. NO HOA.

Single-familyProperty Type

1977Year Built

0.33 acresLot Size

$538Price/Sq.Ft.

3 car garageParking

Listing updated: Sep 10, 2026 at 12:42pm

Redfin checked: 2 minutes ago

•Source:CRMLS #WS26113219

Payment calculator

$9,534 per month

Principal and interest$7,673

Property taxes

$1,521

HOA dues

Home insurance

$341

Utilities

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Open houses

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Around this home

Schools

K - 12
Preschool & daycare

Castle Rock Elementary School

Public K-5 • Assigned • 0.4mi

10/10

South Pointe Middle School

Public 6-8 • Assigned • 1.8mi

10/10

Diamond Bar High School

Public 9-12 • Assigned • 1.0mi

10/10

Provided by GreatSchools

About

Pathfinder

Pathfinder, located between Colima Road and Pathfinder Road, is a hillside and residential Rowland Heights neighborhood with curving cul-de-sacs and wide valley views. The neighborhood’s character concentrates around the Colima Rd & Nogales St intersection, where late-night eateries, tea counters, and small plazas keep the sidewalks active. Housing leans toward 1970s–1990s ranch homes and two-story builds, often with stepped driveways and terraced yards. Schabarum Regional Park frames the area with ridgelines, equestrian trails, and big-sky overlooks. Pacific Palms Resort adds a golf-course edge and a resort-like streetscape nearby. Local staples such as The Hat, A Ri Rang Tofu House, and 101 Noodle Express act as familiar meeting points.

Provided by Walk Score and Local Logic

Market insights

21504 Cold Spring Ln · $1,460,000

DAYS ON MARKET

The average home goes pending in 45 days.

SALE-TO-LIST

Most homes are selling 0% below list price.

LIST PRICE

Median sale price in this area is $1,016,665. (30% lower than this home)

PRICE DROP

17% of homes in this area have had a price drop in the past month.

Property details

Interior
Exterior
Finance

Kitchen

Bathroom

Bedroom

Living

Dining

Interior features
Two-story home
Main-level entry
Main level includes one bedroom and one bathroom
Jack & Jill layout
Walk-in closet
Walk-in pantry
Foyer
Living room
Family room
Primary bedroom with primary bathroom
Has fireplace in the family room
Central cooling
Central furnace heating
Has heating and cooling

Bedrooms
Primary bedroom (includes primary bathroom)
One main-floor bedroom
Additional bedrooms served by Jack & Jill bathroom

Bathrooms
Three full bathrooms
One full bathroom on the main level

Kitchen
Kitchen with walk-in pantry

Laundry & utility
Has laundry room
Washer hookup
Gas dryer hookup
Dedicated laundry room

Heating & cooling
Central cooling
Central furnace heating

Sale and tax history for 21504 Cold Spring Ln

Sale History
Tax History

Date

Event

Price

CRMLS #WS26113219

Sep 10, 2026

Pending

—

Aug 25, 2026

Contingent

—

Aug 20, 2026

Price Changed

$1,460,000

$538/sq ft

Jul 29, 2026

Price Changed

$1,540,000

$568/sq ft

May 30, 2026

Listed

$1,580,000

$583/sq ft

CRMLS #C11114133

Jan 20, 2012

Sold

$700,000

$258/sq ft

Dec 9, 2011

Pending

—

Sep 9, 2011

Price Changed

$738,888

$272/sq ft

Aug 29, 2011

Listed

$748,888

$276/sq ft

WOW!!! GORGEOUS ESTATE SITUATED IN A SECLUDED HILLSIDE OF DIAMOND RIDGE VILLAGE IN SOUTH DIAMOND BAR. FEATURING SPECTACULAR PANORAMIC VIEW AND RESORT-LIKE PARADISE BACK YARD WITH POOL & SPA. THE MAGNIFICENT DOUBLE DOOR ENTRY GREETS YOU INTO A LARGE ENTRY, AN OPEN FLOOR PLAN & A GRAND ROUNDED STAIRCASE. MAIN FLOOR FEATURES A SPACIOUS LIVING ROOM WITH HIGH CEILINGS & FORMAL DINING ROOM, FAMILY ROOM WITH FIREPLACE, BREAKFAST NOOK & BEAUTIFUL KITCHEN WITH GRANITE COUNTER TOP & WALK-IN PANTRY. ALSO, A BEDROOM DOWNSTAIRS WITH DOUBLE DOOR ENTRY, A FULL BATH & LAUNDRY ROOM. * * * NEW ROOF, NEW FRONT DOOR & NEW TILE FLOOR * * * SECOND FLOOR FEATURES A GRAND MASTER SUITE WITH RETREAT & BALCONY WITH A SPECTACULAR VIEW! MASTER BATH HAS BEEN REMODELED WITH NEW TILE FLOORS, NEW CABINETS, SINK AND NEW LUXURIOUS JACUZZI TUB. ALSO, JACK & JILL BEDROOMS & FULL BATH. THE IMPRESSIVE VIEW OF THE HILLS AND CITY LIGHTS CAN BE ENJOYED FROM THE BACK YARD, KITCHEN, BREAKFAST NOOK, FAMILY ROOM, DINING ROOM, MASTER SUITE BATH & BALCONY. THE BACK YARD IS A TRUE PARADISE WITH STUNNING VIEW, SPARKLING POOL & SPA AND COVERED PATIO. YOU NEED TO SEE TO APPRECIATE! YOU WILL NOT BE DISAPPOINTED!

Public Records

Sep 26, 1995

Sold

$294,500

$109/sq ft

Public Records

Jul 19, 1991

Sold

$350,000

$129/sq ft

Public Records

Nov 16, 1988

Sold

$377,000

$139/sq ft

Year

Property tax

Land + Additions

Assessment*

2025

$11,512 (+5.6%)

$431,324 + $452,386

$883,710

2024

$10,906 (+2.9%)

$431,324 + $452,386

$883,710

2023

$10,599 (+2.6%)

$422,867 + $443,516

$866,383

2022

$10,333 (+1.9%)

$414,576 + $434,820

$849,396

2021

$10,140 (+1.3%)

$406,448 + $426,295

$832,743

2020

$10,012 (+1.9%)

$398,479 + $417,937

$816,416

2019

$9,822 (+4.4%)

$394,394 + $413,652

$808,046

2018

$9,412 (+4.8%)

$386,661 + $405,542

$792,203

2017

$8,982 (+3.1%)

$371,648 + $389,796

$761,444

2016

$8,715 (−0.6%)

$371,648 + $389,796

$761,444

2015

$8,769 (−0.1%)

$364,361 + $382,153

$746,514

2014

$8,779 (+76.6%)

$351,858 + $369,040

$720,898

2012

$4,972 (+3.0%)

$350,268 + $367,373

$717,641

2011

$4,829 (+0.8%)

$124,846 + $264,651

$389,497

2010

$4,791 (+0.4%)

$122,399 + $259,462

$381,861

2009

$4,771 (+2.8%)

$121,485 + $257,523

$379,008

2008

$4,641

$121,774 + $258,135

$379,909

Public record

Public record
Zoning

Beds

Baths

Stories

—

Lot width

—

Lot depth

—

Lot size

0.33 Acres

Year renovated

1977

Finished Sq. Ft.

2,712

Unfinished Sq. Ft.

—

Total Sq. Ft.

2,712

Year built

1977

Style

Single Family Residential

County

Los Angeles County

APN

8714002003

Parking Spaces

—

Basement

—

Accessible

—

HOA Dues

—

Garage

—

Features

—

Last updated by owner on Jul 9, 2026.

Low Density Residential District

The RL zoning district is intended primarily for parcels developed with existing detached single-family dwellings. The maximum allowed density for new residential subdivisions within this zoning district will be three dwellings per gross acre. The RL zoning district is consistent with the low density 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

Local insights from Redfin agents

The real estate market is becoming more balanced. Buyers have more inventory, more data, and more time to make informed decisions than they did a year ago. Well-priced homes are still moving quickly, but today’s market rewards preparation, strategy,...
2 months ago • Los Angeles County
Peter Santos
Redfin Premier agent
82 deals
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Climate risks

1/10 Flood Factor

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

5/10 Fire Factor

5% chance of being in a wildfire in next 30 years

5/10 Heat Factor

6 days above 98° expected this year, 17 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

81/ 100

Very good sunlight

Sunscore

This home receives average direct sun exposure in Diamond Bar. There appears to be minimal shading by surrounding buildings, terrain, and vegetation.

8.8 hrs

5.5 hrs

JuneDecember

Provided by Shadowmap

Redfin Estimate for 21504 Cold Spring Ln

$1,423,450

$37K under list price of $1.46M

Nearby comparable homes

The Redfin Estimate uses 6 recent nearby sales, priced between $1.3M to $1.7M.

SOLD JUN 29, 2026
$1,650,000 Last sold price
6 beds5 baths3,300 sq ft
3517 Hawkwood Dr, Diamond Bar, CA 91765
$38/sq ft
smaller lot
7 years newer
SOLD JUN 30, 2026
$1,600,000 Last sold price
4 beds3 baths2,615 sq ft
20139 Lake Canyon Dr, Walnut, CA 91789
$74/sq ft
smaller lot
4 years older
SOLD FEB 6, 2026
$1,330,000 Last sold price
4 beds3 baths2,302 sq ft
21307 Chirping Sparrow Rd, Diamond Bar, CA 91765
$40/sq ft
smaller lot
3 years newer
SOLD MAR 13, 2026
$1,670,000 Last sold price
4 beds3 baths3,263 sq ft
22138 Rim Fire Ln, Diamond Bar, CA 91765
$26/sq ft
larger lot
2 years newer
SOLD MAY 12, 2026
$1,680,000 Last sold price
4 beds3 baths2,697 sq ft
21535 Chirping Sparrow, Diamond Bar, CA 91765
$85/sq ft
smaller lot
3 years newer
SOLD MAY 27, 2026
$1,455,000 Last sold price
5 beds3 baths2,655 sq ft
1554 Deerfoot, Diamond Bar, CA 91765
$10/sq ft
larger lot
2 years newer

Rental earnings

Est. $3,967 per month, based on comparable rentals

This home is pending

The seller has accepted an offer, and this property is now .

Have questions?

Paul Vieyra

Diamond Bar Redfin Agent

Paul Vieyra typically replies in about 6 minutes

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GreatSchools Ratings provided by GreatSchools.org.

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About this home

Payment calculator

Open houses

Nearby open houses (10)

Around this home

Schools

Market insights

Property details

Sale and tax history for 21504 Cold Spring Ln

Public record

Local insights from Redfin agents

Climate risks

Historical weather

Sun exposure

Redfin Estimate for 21504 Cold Spring Ln

This home is pending

Have questions?

Nearby similar homes

New listings for sale in 91765

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