21725 Lost River Dr, Diamond Bar, CA 91765
Property image
Property image
FOR SALE
Listed by Ya Ting Chan, WeTrust Realty, (626) 566-8000

$1,258,880

Original price: $1,348,880
  • 4 Beds
  • 2.5 Baths
  • 1,813 sqft

21725 Lost River Dr, Diamond Bar, CA 91765

Est. Mortgage $7,953/mo*
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Home Highlights

Single-Family Home
Built in 1963
$694/sqft
2 Car Garage

Local Information

  • Map ViewExplore the area around 21725 Lost River Dr.
  • Schools1 Elementary School1 Middle School1 High School
  • Shop & Eat
-- mins to
Commute Destination

About this House

What's unique:Beautifully remodeled single-story homeNew insulationSpacious backyardLarge front yardDedicated officeBrand-new roof
Beautifully Remodeled Single-Story Home in the Heart of Diamond Bar!

Welcome to 21725 Lost River Dr., Diamond Bar, a beautifully renovated single-story home offering 4 bedrooms plus a private office, 2.5 bathrooms, and approximately 1,813 sq. ft. of comfortable living space.

This move-in-ready home has been fully remodeled with quality upgrades throughout, including a brand-new roof, new interior and exterior paint, new water piping, new central A/C system, and new insulation, providing comfort, efficiency, and peace of mind for years to come.

The functional floor plan features bright and spacious living areas, generously sized bedrooms, and a dedicated office that's perfect for working from home, studying, or creating a flex space to fit your lifestyle.

Situated on a desirable lot with a large front yard and spacious backyard, this property offers plenty of room for entertaining, gardening, children to play, or simply relaxing outdoors.

Conveniently located within walking distance to Diamond Bar High School, Evergreen Elementary School, and the popular H Mart shopping plaza, you'll enjoy easy access to shopping, dining, parks, and everyday conveniences. Located in the highly acclaimed Walnut Valley Unified School District, this home is an exceptional opportunity for families seeking top-rated schools.

Home Details for 21725 Lost River Dr

Interior Features

Interior Details
Number of Rooms: 1Types of Rooms: Bedroom
Beds & Baths
Number of Bedrooms: 4Main Level Bedrooms: 5Number of Bathrooms: 3Number of Bathrooms (full): 2Number of Bathrooms (half): 1Number of Bathrooms (main level): 3
Dimensions and Layout
Living Area: 1813 Square Feet
Appliances & Utilities
Laundry: In Garage
Heating & Cooling
Heating: CentralHas CoolingAir Conditioning: Central AirHas HeatingHeating Fuel: Central
Fireplace & Spa
Fireplace: Bonus RoomHas a Fireplace
Windows, Doors, Floors & Walls
Common Walls: No Common Walls
Levels, Entrance, & Accessibility
Stories: 1Number of Stories: 1Levels: OneEntry Location: 1
View
No View

Exterior Features

Exterior Home Features
No Private Pool
Parking & Garage
Number of Garage Spaces: 2Number of Covered Spaces: 2Has a GarageHas an Attached GarageParking Spaces: 2Parking: Garage Attached
Pool
Pool: None
Frontage
Not on Waterfront
Water & Sewer
Sewer: Public Sewer
Surface & Elevation
Elevation Units: Feet

Days on Market

Cumulative Days on Market: 64Days on Market: 69

Property Information

Year Built
Year Built: 1963
Property Type / Style
Property Type: ResidentialProperty Subtype: Single Family ResidenceStructure Type: HouseArchitecture: House
Building
Not a New ConstructionNot Attached PropertyNo Additional Parcels
Property Information
Parcel Number: 8285007027

Price & Status

Price
List Price: $1,258,880Price Per Sqft: $694

Active Status

MLS Status: Active

Location

Direction & Address
City: Diamond Bar
School Information
High School District: Walnut Valley Unified

Agent Information

Listing Agent
Listing ID: TR26156811

Community

Community Features: SidewalksNot Senior Community

HOA

Association for this Listing: California Regional MLSHOA Fee: No HOA Fee

Lot Information

Lot Area: 8392 sqft

Listing Info

Special Conditions: Standard

Offer

Listing Terms: Cash to New Loan

Miscellaneous

Mls Number: TR26156811Living Area Range Units: Square FeetAttribution Contact: 626.566.8000Common Interest: NoneUniversal Property Id: US-06037-N-8285007027-R-N

Additional Information

SidewalksSource Internet Entire Listing Display

Around this home

What Locals Say about Diamond Bar

At least 314 Trulia users voted on each feature.

  • 89 % Say it's dog friendly

  • 88 % Say there are sidewalks

  • 85 % Say car is needed

  • 80 % Say streets are well-lit

  • 78 % Say parking is easy

  • 77 % Say yards are well-kept

  • 74 % Say it's quiet

  • 66 % Say there's holiday spirit

  • 65 % Say people would walk alone at night

  • 64 % Say there's wildlife

  • 60 % Say they plan to stay for at least 5 years

  • 50 % Say kids play outside

  • 48 % Say it's walkable to grocery stores

  • 47 % Say neighbors are friendly

  • 45 % Say it's walkable to restaurants

  • 25 % Say there are community events

Sourced by Trulia users. Learn more about our methodology.
  • 4szj5yrwps
    "Diamond Bar, California, is a distinctive suburban community in eastern Los Angeles County, offering a unique blend of natural beauty, cultural diversity, and modern amenities. The city is characterized by its rolling hills, scenic landscapes, and well-maintained parks, providing residents with ample opportunities for outdoor recreation. Notable parks include Sycamore Canyon Park and Summitridge Park, both offering hiking trails with picturesque views of the San Gabriel Mountains.  The community’s cultural diversity is reflected in its vibrant culinary scene, featuring a wide array of international cuisines. Events such as the annual Family Festival showcase this diversity through live music, carnival games, and food vendors, fostering a strong sense of community among residents.  Education is a cornerstone of Diamond Bar the unique combination of natural beauty, cultural richness, educational excellence, and forward-thinking initiatives make it a standout community within the greater Los Angeles area."
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    Flag
  • Linda Correa
    "School district, bad traffic, no food variety, city does not help girls softball, no entertaining, safe neighborhood."
    0
    Flag
  • hubby pie
    "Safe and quiet. Many families live here and school district is top notch if you are in Walnut Valley Unified School District. That covers about half of Diamond Bar. The other district is good but not as good as Walnut."
    0
    Flag
  • Trulia User
    "Plenty of dog owners in the neighborhood. Everyone is polite to pick up their dogs poop as well as training friendly dogs."
    0
    Flag
  • hubby pie
    "Diamond Bar is a great city with plenty of parks, quiet neighborhoods and excellent shopping and dining. Schools are top notch."
    0
    Flag
  • hubby pie
    "Diamond Bar is a safe and friendly community. People care about the community and are proud of this community."
    2
    Flag
  • hubby pie
    "easy commute with two freeways passing through the community so access to LA, OC, and IE are as easy as it gets."
    0
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  • Madelynnpf
    "I lived in this neighborhood for almost 30 years and can’t imagine living anywhere else. It’s quiet and a great place to rise a family."
    1
    Flag
  • Alexis T.
    "Dogs are welcome in this neighborhood. Everyone cleans up after themselves, keeping the neighborhood tidy. The only thing I can think of is that there are sometimes mountain lions and hawks present which is dangerous for small dogs"
    12
    Flag
  • Romoguadalupe
    "there are many wonderful hiking trails in the area with beautiful views. If you love nature, you'll love DB. "
    1
    Flag
  • Deanna L. R.
    "The yearly Firework show in the park is always nice. The Diamond Bar birthday celebration is a lot of fun as well. "
    0
    Flag
  • Hemming L. A.
    "I’ve lived in this neighborhood for 40 years and it’s a great place to live. Lots of hiking trails and 30 minutes to downtown or the beach."
    0
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  • Nicholesaralegui
    "I like this place very family and friendly. kids have greats activity here in city. we live this place"
    0
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  • Lauren B.
    "Commute is not too bad. I drive my own vehicle. It only gets congested on Diamond Bar Blvd or Grand Ave but otherwise driving in Diamond Bar is pleasant "
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  • Raymond W.
    "Diamond Bar is the safest city I’ve ever lived in. Also, it has many schools and parks! Very family oriented. "
    3
    Flag
  • Oryaan53
    "my family has lived in this neighborhood for 10plus years and its always been a nice quiet , safe and friendly place to live "
    1
    Flag
  • Shengbinmi
    "Some of them allow dogs to walk around by themselves in front of their houses, but the dogs are actually very friendly."
    0
    Flag
  • Trulia User
    "Lots of open space and parks. Lots of sidewalks with trees. There are pet friendly parks and houses. "
    1
    Flag
  • Evelyn G. D. L. C.
    "A lot of cars speed down Pathfinder, otherwise its a very safe neighborhood. The schools are good. Neighbors are friendly. "
    0
    Flag
  • Nicholesaralegui
    "we have amazing neighbors and love the community. the city offers a lot of family activities for everyone."
    0
    Flag
  • Vickiwj
    "Festival, movie night, fireworks, recreational activities, library events, many scenic trails, dog parks, "
    0
    Flag
  • Nicholesaralegui
    "the city is wonderful for family activities. we love this city and all it has to offer. its a great place to raise a family."
    0
    Flag
  • Hemming L. A.
    "I’ve lived here for 40 years. Plenty of hiking trails, 30 minutes from LA, 40 min from the beach. Good area."
    1
    Flag
  • Allyawsome01
    "Good transportation not too much traffic nice people nice area beautiful place to raise a family. Amazing schools"
    0
    Flag
  • Christine B.
    "My neighborhood is clean and has very respectable and friendly residents. I feel very safe living here."
    0
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  • Ashley S.
    "Driving is the main means of transportation. There is a metro station as well as bus stops. However, most people drive."
    0
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  • Wlcastellanos
    "Lots of places to walk your dog...plenty of parks. A few people do not pick up after their dogs but most do and care for the neighborhood."
    0
    Flag
  • Nathan Q.
    "We have young whipper snappers race their cars up and down the street at all hours of the night. As a community we all take turns calling the sheriffs department on them. "
    1
    Flag
  • Steveji1019
    "Neighborhood with quite a lot of Asian cultures. Schools are some of the best around. Middle class to upper middle class families. "
    0
    Flag
  • Tahir P.
    "I work in Diamond Bar, my job is less than 3 miles from my house, but still my commute is 15 minutes at times on a good day (no red lights) 7 mins is as fast as I can get to work which is awesome. Lots of cars on main roads (Grand and Diamond Bar) every morning. People going to schools /work. "
    1
    Flag
  • Joel P.
    "Diamond bar is perfectly located at the intersection of 3 major freeways. 57 ,60, and 10. and very close to the 210. I use all of these in my commute making Diamond bar ideal for my line of work. "
    1
    Flag
  • Christine
    "Summer movie nights, Fourth of July celebrations, avid long-time spirited Halloween, farmer’s markets. "
    0
    Flag
  • Ethan Y
    "Yes, they would like living in my area. There are many people walking their dogs in my community. But I don’t like dog barking"
    0
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  • Kenny O.
    "Quiet area, but be careful of home invasion robbers. Always closed garage doors, and entry points of your home."
    0
    Flag
  • Polly Anderson
    "There are frequent car crashes and dangerous drivers running red lights and just causing close calls."
    0
    Flag
  • Su S.
    "This is a Good place. Good high school near by. Neighborhood are friendly. I really love this community. Pet friendly. Easy to go freeway. "
    0
    Flag
  • Andy M
    "Not much. Just a bedroom community. But I like it the way it is. There have been little.changes in the past ten years other than two small new developments. "
    0
    Flag
  • Tahir P.
    "Cut down to 7 mins as opposed to 45-60 mins one way , the mornings can be a little annoying with the 2 minute signals on main roads"
    0
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Market trends in Diamond Bar

Last updated August 2026
Buyer'sMarketSeller'sMarket
Avg. sale price
$1.08M
$21.33KMoM
Sale-to-List Price
99.0%
0.3%MoM
Price per sq ft
$560
$6MoM
Available listings
193
10MoM

Home Value

Trulia Estimate
$1.23M
Since last month
Decreased$77K (-5.9%)
Since last year
Increased$326K (+36.1%)
Since last sale
Increased$842K (+217.1%)
Learn more about this home's value by checking out its Trulia Estimate, the value of nearby homes, and how much similar homes have sold for.

Trulia Estimate

The of this home's value increased by +110% in the last 10 years
MonthEstimated value
2026
September 2026$1.23M
August 2026$1.31M
July 2026$1.34M
June 2026$1.01M
May 2026$1.02M
April 2026$922K
March 2026$940K
February 2026$926K
January 2026$893K
2025
2024
2023
2022
2021
2020
2019
2018
2017
2016

Comparable sales

These are recently sold homes that have a similar location or other similar features to this home, like bedrooms, bathrooms, and square footage. Get a sense of the expected prices in the area by viewing these homes.
Address
Distance
Property Type
Sold Price
Sold Date
Bed
Bath
Sqft
2421 Castle Rock Rd, Diamond Bar, CA
0.02
Single-Family Home
$959,000
12/12/25
3
2
1,300
2624 Crooked Creek Dr, Diamond Bar, CA
0.29
Single-Family Home
$1,030,000
10/16/25
4
2
1,688
2463 Harmony Hill Dr, Diamond Bar, CA
0.25
Single-Family Home
$1,300,000
02/06/26
4
2
1,831
2013 Morning Canyon Rd, Diamond Bar, CA
0.32
Single-Family Home
$1,158,000
01/26/26
4
2
1,881
1869 Morning Canyon Rd, Diamond Bar, CA
0.40
Single-Family Home
$1,290,000
05/04/26
4
2
1,788
2127 Evergreen Springs Dr, Diamond Bar, CA
0.34
Single-Family Home
$958,600
07/16/26
3
2
1,372
2118 Tierra Loma Dr, Diamond Bar, CA
0.23
Single-Family Home
$1,315,000
03/31/26
5
3
2,468
2710 Castle Rock Rd, Diamond Bar, CA
0.50
Single-Family Home
$1,030,000
02/27/26
4
2
1,756
2606 Castle Rock Rd, Diamond Bar, CA
0.35
Single-Family Home
$975,000
07/31/26
3
2
1,300
2632 Castle Rock Rd, Diamond Bar, CA
0.40
Single-Family Home
$880,000
02/26/26
3
2
1,280

Nearby home prices

Get a sense of expected prices in the area by checking the value of nearby homes.
Address
Distance
Price
Bed
Bath
Sqft
Status
21711 Lost River Dr, Diamond Bar, CA 91765
0.03
$1,057,100
4
2
1,315
Off Market
2421 Castle Rock Rd, Diamond Bar, CA 91765
0.02
$959,000
3
2
1,300
Recently Sold
21624 Birch Hill Dr, Diamond Bar, CA 91765
0.12
$998,000
4
2
1,288
For Sale
2501 Reata Pl, Diamond Bar, CA 91765
0.11
$2,650,000
5
4.5
4,850
Recently Sold
2436 S Diamond Bar Blvd #11, Diamond Bar, CA 91765
0.13
$544,600
2
2.5
1,162
Off Market
2350 Presado Dr #D, Diamond Bar, CA 91765
0.13
$640,300
3
2
1,136
Off Market
21648 Laurelrim Dr #D, Diamond Bar, CA 91765
0.14
$625,000
3
2
1,136
Recently Sold
21750 Laurelrim Dr #A, Diamond Bar, CA 91765
0.13
$569,000
2
1
869
Off Market
21715 Laurelrim Dr #D, Diamond Bar, CA 91765
0.13
$667,900
3
1.5
1,136
Off Market
21725 Laurelrim Dr #D, Diamond Bar, CA 91765
0.13
$575,000
3
2
1,136
Recently Sold
21760 Laurelrim Dr #A, Diamond Bar, CA 91765
0.13
$555,000
2
1
869
For Sale

Price and Tax history

DateEventPrice
Sep 14, 2026
Source: CRMLS #TR26156811
PriceChange
$1,258,880
Price decreased by 7%
Jul 18, 2026
Source: CRMLS #TR26156811
Listed For Sale
$1,348,880
May 21, 2026
Source: Zillow Rentals
ListingRemoved
$4,600
May 8, 2026
Source: Zillow Rentals
Listed For Rent
$4,600
May 3, 2010
Source: N/A
Sold
$388,000

LGBTQ Local Legal Protections

Ya Ting Chan, WeTrust Realty
Agent Phone: (626) 566-8000
The multiple listing data appearing on this website, or contained in reports produced therefrom, is owned and copyrighted by California Regional Multiple Listing Service, Inc. ("CRMLS") and is protected by all applicable copyright laws. Information provided is for viewer's personal, non-commercial use and may not be used for any purpose other than to identify prospective properties the viewer may be interested in purchasing. All listing data, including but not limited to square footage and lot size is believed to be accurate, but the listing Agent, listing Broker and CRMLS and its affiliates do not warrant or guarantee such accuracy. The viewer should independently verify the listed data prior to making any decisions based on such information by personal inspection and/or contacting a real estate professional.
Based on information from California Regional Multiple Listing Service, Inc. as of 2026-09-24 00:06:15 PDT and /or other sources. All data, including all measurements and calculations of area, is obtained from various sources and has not been, and will not be, verified by broker or MLS. All information should be independently reviewed and verified for accuracy. Properties may or may not be listed by the office/agent presenting the information

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Frequently asked questions about 21725 Lost River Dr

  • What is the estimated monthly payment for 21725 Lost River Dr?
    Based on a $1,258,880 list price with 20% down at today's rates, the estimated monthly payment for 21725 Lost River Dr in Diamond Bar, CA is approximately $8,212 (about $6,899 principal & interest, $1,238 property taxes, and $75 homeowner's insurance). This is an estimate. Actual payment depends on your loan terms.
  • How does the list price for 21725 Lost River Dr compare to homes in Diamond Bar?
    21725 Lost River Dr in Diamond Bar, CA is listed at $1,258,880, about 17% above the $1.08M median sale price in Diamond Bar.
  • What do residents say about Diamond Bar?
    Residents describe Diamond Bar, CA as dog-friendly, pedestrian-friendly, and easy to park in. See homes for sale in Diamond Bar, CA.
  • What are the closest schools to 21725 Lost River Dr?
    The closest schools to 21725 Lost River Dr in Diamond Bar, CA are Chaparral Middle School (rated 10/10), Diamond Bar High School (rated 10/10), Evergreen Elementary School (rated 9/10).
  • Does 21725 Lost River Dr have air conditioning?
    Yes, 21725 Lost River Dr in Diamond Bar, CA has air conditioning.
  • Does 21725 Lost River Dr have laundry facilities?
    Yes, 21725 Lost River Dr in Diamond Bar, CA has laundry facilities.
21725 Lost River Dr, Diamond Bar, CA 91765 is a 4 bedroom, 3 bathroom, 1,813 sqft single-family home built in 1963. This property is currently available for sale and was listed by CRMLS on Jul 18, 2026. The MLS # for this home is MLS# TR26156811.