This private Diamond Bar Ranch-style residence is situated on a large private lot in a cul-de-sac neighborhood. Gracious double-door entry to a large foyer leading to the step-down living room with a charming fireplace. The kitchen is a gorgeous 2021 remodel. Quartz countertops, tile backsplash, and recessed lighting wth an under-mount sink. Totally custom cabinetry, including a handy "lazy susan" corner cabinet. The culinary island includes ample seating, storage, a six-burner Thermador range, and an exhaust hood. Built-in Kitchen Aid double ovens with a top-of-the-line refrigerator, Thermador dishwasher, PLUS drawer-style microwave complete the appliance package. The center island offers ample storage for those small appliances and decor that are not often used. Speaking of storage, do not overlook the walk-in pantry installed in 2010 with custom shelving! The kitchen sewer line was sleeved in 2019. Direct access to the kitchen is from the two-car garage. You'll find the laundry, the water softener (paid for in 2020), and the oversized water heater (2022). Off the glamorous kitchen is a large dining area which opens to the family room for ease of entertaining. The family room has beamed vaulted ceilings and sliding doors to the covered patio. Remodeled in 2022, this patio space has newer concrete that spans the whole rear and side of the home. Also included in the 2022 remodel is fresh hardscape with seating and tiered planters with steps to the sloping hillside, ready for your gardening touch. The primary bedroom, bathroom, and one bedroom were reimagined in 2020 to create a dream retreat. The primary bathroom has custom tile throughout with a large walk-in shower with glass doors. There is a lovely skylight for ambient lighting and a massive walk-in and walk-through closet with a custom storage system. There are three other spacious bedrooms and a bright hall bathroom as well. Enjoy the newer dual-pane vinyl windows (2020) and relax in the climate-controlled environment thanks to the 2022 HVAC system. Tesla solar system installed in 2014 on the 2022 roof! More than just a property, this home has been lovingly cared for and updated - ready for you to enjoy!
For sale
Listing Provided by:
Tracey Thorpe DRE #01775129 5622339982,
Coldwell Banker Realty,
Debbie Thorpe DRE #01163045 562-494-4600,
Coldwell Banker Realty
Price cut: $50K (11/6)
$1,200,000
21128 Trigger Ln, Diamond Bar, CA 91765
4beds
2,268sqft
Est.:
Single Family Residence
Built in 1964
10,542 Square Feet Lot
$1,190,100 Zestimate®
$529/sqft
$-- HOA
What's special
Charming fireplaceCustom cabinetrySloping hillsideCulinary islandLarge private lotPrimary bedroomClimate-controlled environment
- 200 days |
- 1,815 |
- 75 |
Zillow last checked: 8 hours ago
Listing updated: November 07, 2025 at 06:11am
Listing Provided by:
Tracey Thorpe DRE #01775129 5622339982,
Coldwell Banker Realty,
Debbie Thorpe DRE #01163045 562-494-4600,
Coldwell Banker Realty
Source: CRMLS,MLS#: PW25184476
Originating MLS: California Regional MLS
Originating MLS: California Regional MLSTour with a local agent
Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 4
- Bathrooms: 2
- Full bathrooms: 1
- 3/4 bathrooms: 1
- Main level bathrooms: 2
- Main level bedrooms: 4
Rooms
- Room types: Bedroom, Family Room, Kitchen, Primary Bathroom, Primary Bedroom, Other, Pantry
Primary bedroom
- Features: Main Level Primary
Primary bedroom
- Features: Primary Suite
Bedroom
- Features: Bedroom on Main Level
Bedroom
- Features: All Bedrooms Down
Bathroom
- Features: Bathtub, Full Bath on Main Level, Low Flow Plumbing Fixtures, Remodeled, Separate Shower, Tub Shower
Family room
- Features: Separate Family Room
Kitchen
- Features: Kitchen Island, Pots & Pan Drawers, Quartz Counters, Stone Counters, Remodeled, Self-closing Cabinet Doors, Self-closing Drawers, Updated Kitchen, Walk-In Pantry
Other
- Features: Walk-In Closet(s)
Heating
- Central, Wood Stove
Cooling
- Central Air
Appliances
- Included: 6 Burner Stove, Built-In Range, Double Oven, Dishwasher, Disposal, Gas Oven, Gas Range, Gas Water Heater, Microwave, Refrigerator, Range Hood, Water Softener, Vented Exhaust Fan, Water To Refrigerator, Water Heater
- Laundry: In Garage
Features
- Breakfast Bar, Ceiling Fan(s), Eat-in Kitchen, Pantry, Storage, Unfurnished, All Bedrooms Down, Bedroom on Main Level, Main Level Primary, Primary Suite, Walk-In Pantry, Walk-In Closet(s)
- Flooring: Carpet, Laminate, Tile
- Windows: Skylight(s)
- Has fireplace: Yes
- Fireplace features: Living Room, Raised Hearth
- Common walls with other units/homes: No Common Walls
Interior area
- Total interior livable area: 2,268 sqft
Video & virtual tour
Property
Parking
- Total spaces: 4
- Parking features: Concrete, Direct Access, Door-Single, Driveway, Driveway Up Slope From Street, Garage Faces Front, Garage, Garage Door Opener, Paved
- Attached garage spaces: 2
- Uncovered spaces: 2
Accessibility
- Accessibility features: Safe Emergency Egress from Home, Low Pile Carpet
Features
- Levels: One
- Stories: 1
- Entry location: 1
- Patio & porch: Concrete, Covered, Front Porch, Patio, Porch
- Pool features: None
- Spa features: None
- Fencing: Block,Wood
- Has view: Yes
- View description: Canyon, Hills, Neighborhood
Lot
- Size: 10,542 Square Feet
- Features: 0-1 Unit/Acre, Back Yard, Front Yard, Sprinklers In Front, Lawn, Landscaped, Near Park, Rectangular Lot, Sprinklers Timer, Sprinklers Manual, Sprinkler System, Sloped Up, Yard
Details
- Parcel number: 8765010032
- Zoning: 0
- Special conditions: Trust
Construction
Type & style
- Home type: SingleFamily
- Architectural style: Ranch
- Property subtype: Single Family Residence
Materials
- Stone Veneer, Stucco, Wood Siding
- Foundation: Slab
- Roof: Composition
Condition
- Updated/Remodeled
- New construction: No
- Year built: 1964
Utilities & green energy
- Electric: Photovoltaics Third-Party Owned, Standard
- Sewer: Public Sewer, Sewer Tap Paid
- Water: Public
- Utilities for property: Cable Available, Electricity Connected, Natural Gas Connected, Phone Available, Sewer Connected, Water Connected, Overhead Utilities
Community & HOA
Community
- Features: Curbs, Gutter(s), Storm Drain(s), Street Lights, Suburban, Sidewalks, Park
- Security: Carbon Monoxide Detector(s), Smoke Detector(s)
Location
- Region: Diamond Bar
Financial & listing details
- Price per square foot: $529/sqft
- Tax assessed value: $270,250
- Annual tax amount: $4,058
- Date on market: 8/15/2025
- Cumulative days on market: 201 days
- Listing terms: Cash to New Loan
- Road surface type: Paved
Estimated market value
$1,190,100
$1.13M - $1.25M
$4,355/mo
Price history
Price history
| Date | Event | Price |
|---|---|---|
| 11/6/2025 | Price change | $1,200,000-4%$529/sqft |
Source:  CRMLS #PW25184476 Report a problem | ||
| 8/22/2025 | Listed for sale | $1,249,999$551/sqft |
Source: CRMLS #PW25184476 Report a problem | ||
Public tax history
Public tax history
| Year | Property taxes | Tax assessment |
|---|---|---|
| 2025 | $4,058 +9.7% | $270,250 +2% |
| 2024 | $3,700 +2.3% | $264,952 +2% |
| 2023 | $3,618 +2.2% | $259,758 +2% |
Find assessor info on the county website
BuyAbility℠ payment
Est. payment
$7,620/mo
Principal & interest
$6040
Property taxes
$1160
Home insurance
$420
Climate risks
Neighborhood: 91765
Nearby schools
GreatSchools rating
- 7/10Castle Rock Elementary SchoolGrades: K-5Distance: 0.3 mi
- 8/10South Pointe Middle SchoolGrades: 6-8Distance: 1.1 mi
- 10/10Diamond Bar High SchoolGrades: 9-12Distance: 0.4 mi
Schools provided by the listing agent
- Elementary: Castle Rock
- Middle: South Pointe
- High: Diamond Bar
Source: CRMLS. This data may not be complete. We recommend contacting the local school district to confirm school assignments for this home.
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