---
listing_id: CRTR26156811
status: Active
price: 1348880
beds: 4
baths_full: 2
baths_half: 1
sqft_living: 1813
sqft_lot: 8392
lot_acres: 
year_built: 1963
property_type: Residential
property_subtype: Single Family Residence
address: "21725 Lost River"
city: Diamond Bar
state: CA
zip: 91765
county: "Los Angeles County"
lat: 33.981038
lng: -117.8328368
days_on_market: 14
hoa_fee: 
hoa_frequency: 
garage_spaces: 2
list_agent: "Ya Ting Chan"
list_office: "WeTrust Realty"
list_agent_phone: "(909) 606-0888"
list_agent_license: 01872450
mls_source: CRMLS
modified: 2026-07-31
transaction_type: buy
---

Home | Los Angeles County | Diamond Bar | 91765 | 21725 Lost River

21725 Lost River, Diamond Bar, CA 91765

MLS: CRTR26156811 | Status: Active | Price: $1,348,880
Beds/Baths: 4 / 2 /1
Property Type: Residential

Quick Facts

Beds Baths Sq Ft Sq Ft Lot Yr Built
4 2 /1 1,813 8,392 1963

Upcoming Open Houses

Date Time Hosted By
Saturday, August 1 1:30 pm - 3:30 pm Ya Ting Chan

Remarks

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 f

MLS Listing Information

Field Value
MLS # CRTR26156811
MLS Source California Regional MLS
Days on Site 14

Features

Interior Features

Feature Details
Bedrooms Ground Floor Bedroom
Fireplace Other Location
Laundry In Garage
Cooling Central Forced Air
Heating Central Forced Air

Exterior Features

Feature Details
Pool None

Parking, School, and Other Information

Feature Details
Garage/Parking Garage: 2 Car(s)
Elementary District Walnut Valley Unified
High School District Walnut Valley Unified
HOA Fee $0

Contact Information

Ya Ting Chan
WeTrust Realty
License #: 01872450
Phone: (909) 606-0888

School Ratings

School data provided by GreatSchools.org

Nearby Schools

School Type Grades Distance Rating
Evergreen Elementary School public K-5 0.11 mi 9
Diamond Bar High School public 9-12 0.36 mi 10
Castle Rock Elementary School public K-5 0.89 mi 10
South Pointe Middle School public 6-8 1.16 mi 10
Maple Hill Elementary School public K-5 1.17 mi 10
Chaparral Middle School public 6-8 1.31 mi 10
Quail Summit Elementary School public K-5 1.60 mi 9
Walnut Valley Adult public UG 1.79 mi N/A
Walnut Elementary School public K-5 1.89 mi 9
Ron Hockwalt Academies (Continuation) School public 9-12 2.31 mi N/A
Ybarra Academy For The Arts And Technology public K-8 2.33 mi 8
Shelyn Elementary School public K-6 2.49 mi 7
Lorbeer Middle School public 7-8 2.86 mi 5
John A. Rowland High School public 9-12 2.88 mi 8
Armstrong Elementary School public K-6 2.89 mi 5
Vejar Elementary School public K-5 2.94 mi 8
Cyrus J. Morris Elementary School public K-5 2.99 mi 8
Walnut High School public 9-12 3.01 mi 10
Killian Elementary School public K-6 3.11 mi 8
Rowland Adult And Community Education public UG 3.12 mi N/A

Nearby Homes

Address Price Beds Baths Sq Ft Status
20111 Evening Breeze Dr $1,398,000 4 3 2,404 Active
20002 Emerald Meadow Dr $1,275,000 3 2/1 2,292 Active
1010 Cogburn $1,118,000 4 3 1,747 Active
752 Golden Prados $1,189,000 4 2/1 2,268 Active
1821 Morning Canyon Rd. $1,295,000 4 2/1 2,071 Active

Disclosures

©2026 California Regional MLS. All rights reserved. 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. Information provided is for personal, non-commercial use by the viewer and may not be redistributed without explicit authorization from California Regional MLS.

Presently MLSListings.com displays Active, Contingent, Pending, and Recently Sold listings. Recently Sold listings are properties which were sold within the last three years. After that period listings are no longer displayed in MLSListings.com. Pending listings are properties under contract and no longer available for sale. Contingent listings are properties where there is an accepted offer, and seller may be seeking back-up offers. Active listings are available for sale.

This listing information is up-to-date as of July 31, 2026. For the most current information, please contact Ya Ting Chan, (909) 606-0888.