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For sale
  • Listed by: WeTrust Realty • Ya Ting Chan • Contact: 626.566.8000
    $1,348,880

    21725 Lost River Dr, Diamond Bar, CA 91765

    4beds
    1,813sqft
    : 
    $8,593/mo
    Get pre-qualified
    Single Family Residence
    Built in 1963
    8,392 Square Feet Lot
    $1,314,200 Zestimate®
    $744/sqft
    $-- HOA

    What's special

    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.
    22 days
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    761
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    31
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    Zillow last checked:

    Listing updated:

    Listed by:

    Ya Ting Chan DRE #01872450 626.566.8000,

    WeTrust Realty

    Source: CRMLS,MLS#: TR26156811MLS LogoOriginating MLS: California Regional MLS

      Facts & features

      Interior

      Bedrooms & bathrooms
      • Bedrooms: 4
      • Bathrooms: 3
      • Full bathrooms: 2
      • 1/2 bathrooms: 1
      • Main level bathrooms: 3
      • Main level bedrooms: 5
      Rooms
      • Room types: Bedroom
      Bedroom
      • Features: All Bedrooms Down
      Heating
      • Central
      Cooling
      • Central Air
      Appliances
      • Laundry: In Garage
      Features
      • All Bedrooms Down
      • Has fireplace: Yes
      • Fireplace features: Bonus Room
      • Common walls with other units/homes: No Common Walls
      Interior area
      • Total interior livable area: 1,813 sqft

      Property

      Parking
      • Total spaces: 2
      • Parking features: Garage - Attached
      • Attached garage spaces: 2
      Features
      • Levels: One
      • Stories: 1
      • Entry location: 1
      • Pool features: None
      • Has view: Yes
      • View description: None
      Lot
      • Size: 8,392 Square Feet
      • Features: Lawn
      Details
      • Parcel number: 8285007027
      • Special conditions: Standard

      Construction

      Type & style
      • Home type: SingleFamily
      • Property subtype: Single Family Residence
      Condition
      • New construction: No
      • Year built: 1963

      Utilities & green energy

      • Sewer: Public Sewer
      • Water: Public

      Community & HOA

      Community
      • Features: Sidewalks
      Location
      • Region: Diamond Bar

      Financial & listing details

      • Price per square foot: $744/sqft
      • Tax assessed value: $500,823
      • Annual tax amount: $6,584
      • Date on market: 7/17/2026
      • Cumulative days on market: 22 days
      • Listing terms: Cash to New Loan

        Estimated market value

        $1,314,200

        $1.25M - $1.38M

        $4,447/mo

        Price history

        DateEventPrice
        7/18/2026Listed for sale$1,348,880+247.6%$744/sqft
        Source: CRMLS #TR26156811 Report a problem
        5/21/2026Listing removed$4,600$3/sqft
        Source: Zillow Rentals Report a problem
        5/8/2026Listed for rent$4,600$3/sqft
        Source: Zillow Rentals Report a problem
        5/3/2010Sold$388,000+147%$214/sqft
        Source: Public Record Report a problem
        2/8/2010Sold$157,100-17.3%$87/sqft
        Source: Public Record Report a problem
        8/2/1999Sold$190,000$105/sqft
        Source: Public Record Report a problem

        Public tax history

        YearProperty taxesTax assessment
        2025$6,584 +5.7%$500,823 +2%
        2024$6,231 +2.4%$491,004 +2%
        2023$6,084 +2.2%$481,377 +2%
        2022$5,956 +1.9%$471,939 +2%
        2021$5,845 +1.3%$462,686 +1%
        2020$5,771 $457,943 +2%
        2019$5,771 +6.8%$448,965 +2%
        2018$5,406 $440,163 +2%
        2017$5,406 +4.8%$431,533 +2%
        2016$5,161 +3%$423,072 +1.5%
        2015$5,011 -0.7%$416,719 +2%
        2014$5,046 $408,557 +2.5%
        2012-- $398,738 +2%
        2011-- $390,921 +42.3%
        2010-- $274,664 -0.2%
        2009-- $275,318 +2%
        2008-- $269,921 +2%
        2007-- $264,630 +2%
        2006-- $259,442
        2005-- $259,442 +4%
        2004-- $249,370 +1.9%
        2003-- $244,800 +2%
        2002-- $240,000 +26.3%
        2000-- $190,000
        Find assessor info on the county website

        Monthly payment

        Est. payment

        Payment breakdown

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        All calculations are estimates and provided by Zillow, Inc. for informational purposes only. Actual amounts may vary.
        HOA fees may include property taxes on listings classified as Co-Ops. Contact the listing agent and/or owner for fee details.
        Mortgage interest rates are dependent on a number of factors, including credit score, down payment, and repayment length. Interest rate data provided by Zillow Group Marketplace, Inc. as of 1/1/1970 from various mortgage lenders with which we have lead or other similar arrangements; the Estimated Payment is an average of those rates.
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        Climate risks

        Neighborhood: 91765

        Getting around

        28 / 100
        Car-Dependent
        27 / 100
        Somewhat Bikeable

        Nearby schools

        GreatSchools rating

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