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21833 Onawa Place
Diamond Bar CA 91765 US

$1,258,000

Active Listing ID WS26009062
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4 bed
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2.00 Bath (2 Full)
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Lot: 28,749.00 Square Feet
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Single Family Residence

$1,258,000

Active Listing ID WS26009062
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21833 Onawa Place Welcome to 21833 Onawa Pl in Diamond Bar! A completely reimagined, turnkey single-story residence tucked away on a peaceful cul-de-sac in the highly sought-after Walnut Valley Unified School District. Surrounded by mature trees and set on over half an acre, this home offers privacy, space, and modern comfort in one of Diamond Bar’s most desirable neighborhoods. This stunning 4-bedroom, 2-bath home has been thoughtfully remodeled from top to bottom, features brand new interior and exterior paint, creating a fresh, clean, and modern look from the moment you arrive. Step through the double-door entry into a bright, open living space filled with natural light, enhanced by upgraded flooring, recessed lighting, and a cozy fireplace — perfect for both everyday living and entertaining. The living room flows seamlessly into the dining area and family room, where large windows and a newer sliding door frame views of the expansive backyard. The fully remodeled kitchen is both stylish and functional, offering ample cabinetry, sleek modern finishes, brand new appliances, and backyard views. An individual laundry room with side-yard access adds to the home’s practical layout. The primary suite serves as a private retreat with generous closet space and a beautifully updated en-suite bathroom. Three additional bedrooms provide flexibility for a growing family, guests, or a home office. Every detail reflects quality craftsmanship and modern design, including updated bathrooms, newer windows and doors, newer roof, re-routed plumbing, tankless water heater, and numerous upgrades that enhance both style and function. Step outside to an exceptionally large and private backyard offering endless possibilities, including room for a future ADU, pool, outdoor kitchen, California room, or expanded garden — ideal for multi-generational living, rental income potential, or creating your dream outdoor retreat. The long driveway and 3-car attached garage provide abundant parking and storage, with additional space for trailer or RV parking. Ideally located less than a mile from top-rated Evergreen Elementary and Diamond Bar High School, and just minutes from Chaparral Middle School, close to shopping, dining, parks, and freeway access, this home delivers the perfect balance of tranquility and convenience. Completely remodeled. Large lot with ADU potential. Single-story homes on cul-de-sacs in Diamond Bar are rare — and this one makes a statement.

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Property Features

  • Facts
  • Lot Size: 28,749.00 Square Feet
  • Property Type: Residential
  • Property Sub-type: Single Family Residence
  • Features
  • Full Bathrooms: 2
  • Cooling System: Central Air
  • Exterior Finish: Community Features Included: Curbs, Hiking, Sidewalks, Street Lights, Back Yard, Cul-de-sac, Front Yard, Gentle Sloping, Lot 20000-39999 Sqft
  • Floor Covering: Wood
  • Roof Type: Composition
  • Heating Fuels: Central

School Information

  • School
  • DIABAR(HighSchool)

Property

  • propertytype: Residential
  • propertysubtype: Single Family Residence
  • listprice: 1258000
  • unparsedaddress: 21833 Onawa Place
  • postalcity: Diamond Bar
  • stateorprovince: CA
  • country: US
  • postalcode: 91765
  • bathroomsfull: 2
  • bathroomshalf: 0
  • bathroomsonequarter: 0
  • bathroomsthreequarter: 0
  • lotsizeacres: 0.659986225895317
  • lotsizeunits: Square Feet
  • lotsizearea: 28749
  • livingarea: 1881
  • livingareaunits: Square Feet
  • listagentfullname: CHEN DONG
  • listagentemail: alexdong75@gmail.com
  • listagentkey: 3yd-MRMLSCA-WS83708
  • listagentmlsid: WS83708
  • listagentpreferredphone: 9095008877
  • listagentofficephone: 6268889808
  • listofficekey: 3yd-MRMLSCA-20652
  • listagentstatelicense: 02151161
  • listofficemlsid: 20652
  • disclaimer: Copyright © 2026 California Regional Multiple Listing Service, Inc. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.
  • sourcesystemid: MRMLSCA
  • yearbuilt: 1964
  • listingcontractdate: 2026-01-15
  • listagenturl: http://www.usnationalrealty.com/
  • countyorparish: Los Angeles
  • parcelnumber: 8292012022
  • highschool: DIABAR
  • elementaryschooldistrict: Walnut Valley Unified
  • middleorjuniorschooldistrict: Walnut Valley Unified
  • highschooldistrict: Walnut Valley Unified
  • appliances: Dishwasher, Garbage Disposer, Microwave, Range, Range - Gas, Washer
  • cooling: Central Air
  • flooring: Wood
  • heating: Central
  • numberofunitstotal: 1
  • fireplaceyn: False
  • transactiontype: ForSale
  • storiestotal: 1
  • parkingtotal: 6
  • parkingfeatures: Driveway, Garage
  • roof: Composition
  • waterfrontyn: False
  • exteriorfeatures: Community Features Included: Curbs, Hiking, Sidewalks, Street Lights, Back Yard, Cul-de-sac, Front Yard, Gentle Sloping, Lot 20000-39999 Sqft
  • architecturalstyle: Other
  • rooms: Bathroom 1, Bathroom 2, Bedroom 1, Bedroom 2, Bedroom 3, Bedroom 4, Family Room, Kitchen, Laundry, Living Room
  • dock: False
  • poolprivateyn: False
  • spayn: False
  • internetaddressdisplayyn: True
  • internetautomatedvaluationdisplayyn: True
  • internetconsumercommentyn: True
  • openhouse: { "AppointmentRequiredYN": false, "ListingKey": "3yd-MRMLSCA-WS26009062", "OpenHouseEndTime": "2026-01-18T00:00:00+00:00", "OpenHouseId": "WS26009062", "OpenHouseRemarks": null, "OpenHouseStartTime": "2026-01-17T22:00:00+00:00", "OpenHouseType": null, "VirtualOpenHouseURL": null }, { "AppointmentRequiredYN": false, "ListingKey": "3yd-MRMLSCA-WS26009062", "OpenHouseEndTime": "2026-01-19T00:00:00+00:00", "OpenHouseId": "WS26009062", "OpenHouseRemarks": "", "OpenHouseStartTime": "2026-01-18T22:00:00+00:00", "OpenHouseType": null, "VirtualOpenHouseURL": null }
  • customfields: {"AdditionalInformation":{}, "AlternatePrices":[], "BrokerName":"US National Realty", "BuilderEmail":null, "BuilderFax":null, "BuilderPhone":null, "City":null, "Country":null, "Expenses":[], "GeocodeOptions":null, "LeadRoutingEmail":"alexdong75@gmail.com", "ListBrokerageCity":"Temple City", "ListBrokerageCountry":"US", "ListBrokerageEmail":"phsu168@gmail.com", "ListBrokerageLogoUrl":"http://brokerlogos.listhub.net/MRMLSCA/7f0c481077c911e3857e12313b0d48af/20140108222455000.png", "ListBrokerageName":"US National Realty", "ListBrokeragePhone":"(626) 382-1688", "ListBrokeragePostalCode":"91780", "ListBrokerageStateOrProvince":"CA", "ListBrokerageUnitNumber":null, "ListBrokerageUnparsedAddress":"9139 Las Tunas Dr", "ListBrokerageWebsiteUrl":"http://www.usnationalrealty.com/", "ListOfficeAddress1":"2633 S. Baldwin Ave.", "ListOfficeAddress2":null, "ListOfficeBrokerMlsId":"w74926", "ListOfficeCity":"Arcadia", "ListOfficeCountry":"US", "ListOfficeEmail":"usnationalrealty@gmail.com", "ListOfficePostalCode":"91007", "ListOfficeStateOrProvince":"CA", "ListPriceCurrencyType":"USD", "ListingTitle":"Single Family Residence - Diamond Bar, CA", "ListingURL":"https://www.realtor.com/realestateandhomes-detail/21833-Onawa-Pl_Diamond-Bar_CA_91765_M16009-02598?f=listhub&s=MRMLSCA&m=WS26009062&c=rexren", "MLSModificationTimestamp":"2026-01-15T00:06:05Z", "Neighborhoods":[], "PostalCode":null, "RawPropertySubType":"Single Family Residence", "RawPropertyType":"Residential", "RoomCount":null, "StateOrProvince":null, "Taxes":[], "UnitNumber":null, "UnparsedAddress":null}
Listing Changed: 1/15/2026 12:10:14 PM GMT
Source Updated Date: 1/15/2026 6:46:38 PM GMT

Courtesy of: CHEN DONG, Pinnacle Real Estate Group, alexdong75@gmail.com

Copyright © 2026 California Regional Multiple Listing Service, Inc. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.