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Off Market

21833 Onawa Place

Diamond Bar CA 91765

4
2
6
1881 sq. ft.
28749 sq. ft.
Single-Family
Last sold for $1,320,000
CHEN DONGCHEN DONG, last sold this property on 27 February 2026 after 43 days on market.

Overview

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.

Features

4 bedrooms
2 bathrooms
6 carspaces
3 open car spaces
3 garage spaces
1881 sq. ft. floor area
28749 sq. ft. lot size
Single-Family

Estimated Value

Based on this property and similar 4 bedroom single-family properties sold in Diamond Bar over the last 12 months, the estimated median property value of 21833 Onawa Place is $1.24m.

Median value
$1.24m
Estimated value range
$765k - $2.55m
Median days on market
13
Estimated value trend
3%
increase over the last 12 months
Average days on market is based on recent, comparable sales in Diamond Bar. It is only an indication of the time a property is actively listed and should not be relied upon as an accurate representation of how soon a property will be sold.

Property history for 21833 Onawa Place

2026
Sold
$1,320,000
27 Feb 2026 by CHEN DONG, of Pinnacle Real Estate Group
2025
Sold
$1,050,000
16 Oct 2025 by Marina Allensworth, of Realty World Allensworth

Happy sellers in Diamond Bar

~%

We have insufficient information to provide an overview of customer satisfaction for Diamond Bar. Viewing the agent profiles, reviews and sales for Diamond Bar can provide insights for this location.

Local market activity for 4 bedroom single-family properties in Diamond Bar

In the last 12 months, 134 four-bedroom single-family properties similar to 21833 Onawa Place, have been sold.

Nearby agents

Compare and contact these top performing agents who’ve delivered exception customer service for their clients in Diamond Bar

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Mauricio Rodriguez

Mauricio Rodriguez is a recommended agent for Diamond Bar.  They have 1 local sale and collected 1 local review across the last 12 months.

  •   5   (1 review)
  •  1 Review in Diamond Bar
  •  1 Sale in Diamond Bar
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Stanley Escobar

Stanley Escobar is a recommended agent for Diamond Bar.  They have 1 local sale and collected 1 local review across the last 12 months.

  •   5   (33 reviews)
  •  1 Review in Diamond Bar
  •  1 Sale in Diamond Bar
View profile
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Lan "Gloria" Xiao

Lan "Gloria" Xiao is an award winning recommended agent for Diamond Bar.  They have 1 local sale and collected 1 local review across the last 12 months.

  •   5   (110 reviews)
  •  1 Review in Diamond Bar
  •  1 Sale in Diamond Bar
View profile
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George Najem

George Najem is a recommended agent for Diamond Bar.  They have 1 local sale and collected 1 local review across the last 12 months.

  •   5   (4 reviews)
  •  1 Review in Diamond Bar
  •  1 Sale in Diamond Bar
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