Located in the heart of Diamond Bar, this beautifully upgraded single-level home offers both comfort and convenience. Featuring 4 bedrooms and 2 full bathrooms—with the potential to easily convert the bathroom area back into a 5th bedroom—this residence has been thoughtfully enhanced with a newly installed roof, dual-pane windows, and a modern HVAC system to ensure year-round comfort and energy efficiency. Nestled on a quiet residential street, the home also provides quick access to the 57 and 60 freeways, making it ideal for commuters. It’s just minutes from major shopping centers, banks, and the post office, offering ease and practicality for daily errands. Located within the highly sought-after Walnut Valley Unified School District and just a few blocks from Diamond Bar High School, this property is a top choice for families. The backyard offers a private outdoor space, perfect for relaxing or entertaining. Whether you're a growing household or simply looking for a well-appointed single-story home in a prime location, this Diamond Bar gem checks all the boxes.
Off market
Listing Provided by:
$1,229,700
21128 Trigger Ln, Diamond Bar, CA 91765
4beds
2,268sqft
Single Family Residence
Built in 1964
10,542 Square Feet Lot
$1,229,700 Zestimate®
$542/sqft
$4,344 Estimated rent
What's special
Zillow last checked: 7 hours ago
Listing updated: August 03, 2025 at 05:37pm
Source: CRMLS,MLS#: TR25099902
Originating MLS: California Regional MLS

Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 4
- Bathrooms: 2
- Full bathrooms: 2
- Main level bathrooms: 3
- Main level bedrooms: 5
Cooling
- Central Air
Appliances
- Laundry: Laundry Room
Features
- All Bedrooms Down, Bedroom on Main Level, Jack and Jill Bath
- Has fireplace: Yes
- Fireplace features: Family Room
- Common walls with other units/homes: No Common Walls
Interior area
- Total interior livable area: 2,268 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: 10,542 sqft
- Features: Sprinkler System, Walkstreet
Details
- Parcel number: 8765010032
- Special conditions: Standard,Trust
Construction
Type & style
- Home type: SingleFamily
- Property subtype: Single Family Residence
Condition
- New construction: No
- Year built: 1964
Utilities & green energy
- Sewer: Public Sewer
- Water: Public
Community & neighborhood
Community
- Community features: Suburban
Location
- Region: Diamond Bar
Other
Other facts
- Listing terms: Cash,Cash to New Loan,Conventional,1031 Exchange
Services availability
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Estimated market value
$1,229,700
Get a cash offer in 3 minutes
Find out how much your home could sell for in as little as 3 minutes with a no-obligation cash offer.
Estimated market value
$1,229,700