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21833 Onawa Pl
Diamond Bar, CA 91765
Diamond Bar Area
Price:$1,050,000
$558.21 / Sq.Ft.
Bedroom:4Bathroom:2
Sq. Ft.:1,881Year Built:1964
Type:Single Family Residence, Detached
MLS #:DW25220826Status:Active
Listed:9/17/2025Modified:9/20/2025
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Welcome home to 21833 Onawa Pl in Diamond Bar! Peaceful and quiet, this cul de sac location amongst mature trees sits in the coveted Walnut Valley Unified School District and cannot be beat!! Single story stunner with 4 bedrooms, 2 baths and a primary suite with an en suite bathroom. Step through the double door entry into the light and bright front living room featuring bamboo floors, recessed lighting, window seat and cozy fireplace. Perfect spot for entertaining and enjoying family gatherings during the upcoming holiday season! Family room with dining combo await just off living room and kitchen, featuring newer sliding door and gorgeous views of the private backyard. Kitchen has plenty of storage, newer oven and beautiful views of the backyard. Individual laundry room with side yard access is just off of kitchen. Primary suite features an entry hall with double closets, an en suite bathroom, hardwood floors and plantation shutters. 3 additional bedrooms offer plenty of space for your growing or multigenerational family! Large driveway features plenty of parking and 3 car attached garage. Front yard offers low maintenance plantings and generous side yard has potential for trailer parking. Private backyard is your new retreat and features a quiet seating area, horseshoe area, tetherball area, lawn and bark areas and beds for planting. The possibilities are endless with this much space. There is room for a pool, room for a California outdoor room with entertainment area and kitchen, more garden beds and specialized plantings, or enclosures for pets! Over one half acre total. Several big ticket items are done, Re-roof within past 10 years., plumbing rerouted through attic within past 10 years. New hvac and all duct work in attic done within last 7 years, newer windows, newer sliding door, oven and tankless water heater. Educational opportunities abound in Diamond Bar, with award winning Evergreen Elementary and Diamond Bar High Schools less than 1 mile away, and Chaparral Middle School less than 2 miles. The prestigious Claremont Colleges are a short 20 min drive and Mt San Antonio College is a short 14 min drive. Located 1 mile from the 57 freeway, and close to world class education, shopping parks, medical offices, restaurants, and specialty stores, this location is second to none!
Rooms Amenities
  • 4 Bedrooms
  • 2 Full Baths
  • Bedrooms: All Bedrooms Down
  • View: Neighborhood, See Remarks
 
  • # of Garages: 3
  • Pool: None
Interior Exterior/Structural
  • Cooling: Central
 
  • Stories: One Level
Lot Description Community/Association
  • Lot Sq. Ft.: 28,749
  • Acres: 0.66
 
  • LA County
  • Area: Diamond Bar
  • School District: Walnut Valley Unified
  • HOA: $0 +
Price Information Listing Information
  • Current Price: $1,050,000
  • Original Price: $1,050,000
  • Price/Sq. Ft.: $558.21
 
  • Listed Date: 9/17/2025
  • Modified Date: 9/20/2025
Listing Agent Listing Office
Marina Allensworth
714-504-2898
 Realty World Allensworth
 
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  Need Help?
Michelle Kwon
Michelle Kwon
DRE# 01361657
Call 714-335-0500
to refer to MLS # DW25220826
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The information above, though secured from sources believed to be reliable, cannot be guaranteed. The buyer should independently verify this information to his/her satisfaction. Coldwell Banker Best Realty may or may not be the listing broker of this property. In either case, where allowed by law, Coldwell Banker Best Realty can represent you in the purchase of this property.

Based on information from California Regional Multiple Listing Service, Inc. as of 9/20/2025. This information is for your personal, non-commercial use and may not be used for any purpose other than to identify prospective properties you may be interested in purchasing. Display of MLS data is usually deemed reliable but is NOT guaranteed accurate by the MLS. Buyers are responsible for verifying the accuracy of all information and should investigate the data themselves or retain appropriate professionals. Information from sources other than the Listing Agent may have been included in the MLS data. Unless otherwise specified in writing, Broker/Agent has not and will not verify any information obtained from other sources. The Broker/Agent providing the information contained herein may or may not have been the Listing and/or Selling Agent.

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