21725 Lost River, Diamond Bar, CA 91765

Single-Family · For sale · $1,348,880 · MLS# TR26156811

Single-Family for sale in Southern California — $1,348,880. 4 beds · 3 baths · 1,813 sqft. 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 bathroom…

21725 Lost River
For sale

$1,348,880

21725 Lost River, Diamond Bar, CA 91765

4beds
3baths
1,813sqft
Single-FamilyProperty type
1963Year built
8,392 sqft lotLot size
1,813 sqftLiving area
$744/sqftPrice / sqft
HOA
2 spacesGarage

Facts & features

Interior

Bedrooms & bathrooms

  • Bedrooms: 4
  • Bathrooms: 3
  • Full bathrooms: 2
  • Half bathrooms: 1

Heating

  • Heating: Central

Cooling

  • Cooling: Central Air

Appliances

  • Laundry: In Garage

Interior area

  • Living area: 1,813 sqft

Property

Parking

  • Total parking spaces: 2
  • Garage spaces: 2

Lot

  • Lot size: 8,392 sqft

Features

  • Pool features: None
  • View: None

Construction

Type & style

  • Home type: Single-Family
  • Property subtype: Single Family Residence

Condition

  • Year built: 1963

Community & HOA

Community

  • Has HOA: No

Financial & listing details

  • Days on market: 1 day
  • Price / sqft: $744
  • Status: Active
  • MLS#: TR26156811

Location

  • City: Diamond Bar
  • ZIP: 91765

About this home

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.

Listing updated: July 19, 2026 at 6:12 AM

Listed by: Ya Ting Chan, WeTrust Realty

Source: CRMLS, MLS#: TR26156811, Originating MLS: California Regional MLS

Location

Explore parks, streets, and what's around this home.

Diamond Bar

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Facts & features

Interior

Bedrooms & bathrooms

  • Bedrooms: 4
  • Bathrooms: 3
  • Full bathrooms: 2
  • Half bathrooms: 1

Heating

  • Heating: Central

Cooling

  • Cooling: Central Air

Appliances

  • Laundry: In Garage

Interior area

  • Living area: 1,813 sqft

Property

Parking

  • Total parking spaces: 2
  • Garage spaces: 2

Lot

  • Lot size: 8,392 sqft

Features

  • Pool features: None
  • View: None

Construction

Type & style

  • Home type: Single-Family
  • Property subtype: Single Family Residence

Condition

  • Year built: 1963

Community & HOA

Community

  • Has HOA: No

Financial & listing details

  • Days on market: 1 day
  • Price / sqft: $744
  • Status: Active
  • MLS#: TR26156811

Location

  • City: Diamond Bar
  • ZIP: 91765

Price history

DateEventPrice
7/17/2026Source: CRMLS, #TR26156811Listed for sale$1,348,880$744/sqft
California Regional Multiple Listing Service (CRMLS)

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 2026-07-19 06:12:51 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