Backup offers
#TR25142715, Cathy Cheng, Listing office: CC Royal Realty
#TR25099902·
Listing office: RE/MAX Galaxy·
Listing agent: Grace Zhang·
Listing office phone: 909-223-2297
$1,250,000 List price
21128 Trigger Ln Diamond Bar, CA 91765
4 beds
2 full
2,268 sqft
0.2 acres
$551 / sqft
House
Property details
About 21128 Trigger Ln
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.
Highlights
Home typeSingle Family Residence
StatusActive
CoolingCentral Air
Size2,268 sqft
Lot size0.242 Acres
Year built1964
MLS #TR25099902
Attached garage2 spaces
FireplaceFamily Room
Summary
- Full Bathrooms: 2
- Interior: All Bedrooms Down, Bedroom on Main Level, Jack and Jill Bath
- Fireplace: Family Room
- Total Bedroom Count: 4
- Garage Space: 2 spaces
- Attached Garage: Yes
- Private Pool: No
- Cooling: Central Air
- List Price: $1,250,000
- Price/SqFt: $551
- HOA Amount: $0
- Annual Tax Amount: $3,700
- Tax Year: 2024
- Lot: Sprinklers
- Directions: Follow Field Dr and Trigger lane
- Year Built: 1964
- Stories: 1
- Living Area: 2,268 SqFt
- Lot Size: 0.242 Acres
- MLS Number: TR25099902
- MLS Name: CRMLS
- Office Name: RE/MAX Galaxy
- Office Phone: (909) 223-2297
- Listing Agent: Grace Zhang
Based on information from California Regional Multiple Listing Service, Inc. and /or other sources. All data, including all measurements and calculations of area, is obtained from various sources and has not been, and will not be, verified by broker or MLS. All information should be independently reviewed and verified for accuracy. The data contained herein is copyrighted by CRMLS and is protected by all applicable copyright laws. Any dissemination of this information is in violation of copyright laws and is strictly prohibited.
The information being provided by California Regional Multiple Listing Service, Inc. (“CRMLS”) 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. Any information relating to a property referenced on this web site comes from CRMLS. Properties may or may not be listed by the office/agent presenting the information. Real estate listings held by brokerage firms other than this broker are marked with the Internet Data Exchange logo and detailed information about them includes the names of the listing brokers and listing agents. MLS search engine provided by IHR Technology Services. This data is updated every 2 hours. Some properties appearing for sale on this display may subsequently have sold and may no longer be available.
Data displayed may be a portion of, and not a complete set of all listings published in the MLS.
Last updated on: 7/12/2025, 8:45:41 AM Eastern. If you have any questions regarding the accuracy of this data, please contact us at help@rockethomes.com.
Price information
Property sales
We're sorry, we currently don't have property sales data for this listing.
Tax history
| Year | Assessment | Property Tax |
|---|---|---|
| 2024 | $264,952 | $3,700 |
| 2023 | $259,758 | $3,618 |
| 2022 | $254,666 | $3,541 |
| 2021 | $249,673 | $3,465 |
| 2020 | $247,114 | $3,360 |
| 2019 | $242,269 | $3,173 |
| 2018 | $237,519 | $3,037 |
| 2017 | $232,863 | $3,037 |
History based on county public records data.
Nearby schools
9
Castle Rock Elementary School
Public District KG-5
0.3 mi
•2975 Castle Rock Rd
7
Evergreen Elementary School
Public District KG-5
0.7 mi
•2450 Evergreen Springs Dr
7
Shelyn Elementary School
Public District KG-6
1.8 mi
•19500 Nacora St
School ratings are a score out of 10, where 10 is the highest and 1 is the lowest.
Neighborhood
The neighbors living near this home have an average income of $76,042. Residents of Diamond Bar, CA typically earn between $35k-100k each year. Residents typically live in married, no kids family. Most residents in this area have post secondary degree education.
How much money do the neighbors make?
22%
<35k
44%
35k-100k
26%
100k-200k
8%
200k+
What level of education do the neighbors have?
No High School
High School Diploma
Post Secondary Degree
Masters Degree
Doctorate
What types of families live nearby?
22%
Single, No Kids
8%
Single, with Kids
36%
Married, No Kids
34%
Married, with Kids
Are the neighbors home owners or renters?
Home Owners
Renters
How old are people in this area?
12%
<11 yrs old
10%
12-17 yrs old
20%
18-34 yrs old
49%
35-64 yrs old
9%
65+ yrs old
What do the neighbors do for fun?
Skiing/snowboarding
Soccer
Men's Tennis
Where do the neighbors shop?
Nordstrom
The Container Store
Bloomingdales
Where do the neighbors go to eat?
California Pizza Kitchen
Starbucks
Bonefish Grill
What do the neighbors drive?
BMW
Lexus
Mazda
What do the neighbors listen to?
Talk/Personality
Alternative
News
All data provided by Home Junction and Claritas
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Frequently asked questions
About 21128 Trigger Ln
The listing price of 21128 Trigger Ln property is $1,250,000.
The property 21128 Trigger Ln is a house located in Diamond Bar, California, 91765.
Active Listing: 21128 Trigger Ln is For Sale (Active/New) which means the seller is accepting offers.
The nearby schools for 21128 Trigger Ln are: Castle Rock Elementary School (GreatSchools Rating 9/10), Evergreen Elementary School (GreatSchools Rating 7/10), Shelyn Elementary School (GreatSchools Rating 7/10), South Pointe Middle School (GreatSchools Rating 8/10), Ybarra Academy for the Arts and Technology (GreatSchools Rating 6/10), Chaparral Middle School (GreatSchools Rating 9/10), Diamond Bar High School (GreatSchools Rating 10/10), John A. Rowland High School (GreatSchools Rating 8/10), Ron Hockwalt Academies (Continuation) (GreatSchools Rating 3/10).
According to the records, the last property tax for 2024 is $3,700 (source: MLS/based on county public records data).
The property at 21128 Trigger Ln has 4 bedrooms and 2 bathrooms.
The property 21128 Trigger Ln is 2,268 SqFt (source: MLS/tax record).
The year of construction for 21128 Trigger Ln is 1964.
This home is located at 21128 Trigger Ln in Diamond Bar, CA and zip code 91789 in the The San Gabriel Valley neighborhood. This 2,268 square foot home, which was built in 1964, sits on a 0.24 acre lot. Features: 4 bedrooms, 2 bathrooms. It has been listed on Rocket Homes since May 8, 2025 and is currently priced at $1,250,000.
Over 12 listings were sold over their listed price in June 2025 in Diamond Bar, CA. In the same period over 20 listings were sold below the listed price and 2 listings were sold for the listed price. Between May and June 2025, Diamond Bar, CA real estate market has seen increase in the number of listings by 7.1%. In June 2025, listings were on the market for 45 days. During the same period, the median list price in this real estate market was $979,500.
From Rocket Homes Real Estate and based on county public records data.