21408 Running River Ct, Diamond Bar, CA 91765
Property image
Property image
SOLD
JUL 31, 2026

21408 Running River Ct
Diamond Bar, CA 91765

  • 5 Beds
  • 4 Baths
  • 2,334 sqft

$1,265,000

Last Sold: Jul 31, 2026
3% below list $1.3M
$542/sqft
Est. Refi. Payment $7,636/mo*
Refinance Your Home

$1,265,000

Last Sold: Jul 31, 2026
3% below list $1.3M
$542/sqft
Est. Refi. Payment $7,636/mo*
Refinance Your Home
5 Beds
4 Baths
2,334 sqft

Local Information

  • Map ViewExplore the area around 21408 Running River Ct.
  • Schools1 Elementary School1 Middle School1 High School
  • Shop & Eat
-- mins to
Commute Destination

Home Highlights

Property Type
Single-Family Home
Year Built
1977
Living Area
2,334 sqft
Price/Sqft
$542/sqft
Parking
2 Car Garage

About this House

Picture yourself at 21408 Running River Ct, a residence designed for everyday comfort and enjoyment. Inside, a cozy fireplace provides warmth, while the kitchen features all stainless steel appliances complemented by an accent backsplash. The exterior boasts a covered patio extending to a in ground pool, all within a fenced in backyard. This property is perfect for outdoor living and comfort. Included 100-Day Home Warranty with buyer activation
21408 Running River Ct, Diamond Bar, CA 91765 is a 5 bedroom, 4 bathroom, 2,334 sqft single-family home built in 1977. It last sold for $1,265,000 on Jul 31, 2026 (3% below the $1,300,000 asking price). It is currently off market. The Trulia Estimate is $1,264,900, with a rent estimate of $5,184/month.

Home Details for 21408 Running River Ct

Interior Features

Interior Details
Number of Rooms: 1Types of Rooms: Kitchen
Beds & Baths
Number of Bedrooms: 5Number of Bathrooms: 4Number of Bathrooms (full): 4
Dimensions and Layout
Living Area: 2334 Square Feet
Appliances & Utilities
Appliances: Range/OvenLaundry: Other
Heating & Cooling
Heating: Natural GasHas CoolingAir Conditioning: Central AirHas HeatingHeating Fuel: Natural Gas
Fireplace & Spa
Number of Fireplaces: 1Fireplace: GasSpa: NoneHas a Fireplace
Windows, Doors, Floors & Walls
Flooring: Other
Levels, Entrance, & Accessibility
Stories: 2Levels: TwoFloors: Other
View
No ViewView: None
Security
Security: Security System Owned

Exterior Features

Exterior Home Features
Other Structures: None
Parking & Garage
Number of Garage Spaces: 2Number of Covered Spaces: 2No CarportHas a GarageHas an Attached GarageParking Spaces: 2Parking: Attached
Pool
Pool: In GroundPool

Property Information

Year Built
Year Built: 1977
Property Type / Style
Property Type: ResidentialProperty Subtype: Residential, Single Family ResidenceStructure Type: DetachedArchitecture: Detached
Building
Not Attached Property
Property Information
Parcel Number: 8292020027

Price & Status

Price
List Price: $1,300,000Price Per Sqft: $542/sqft
Status Change & Dates
Off Market Date: Tue Jul 07 2026

Active Status

MLS Status: Sold

Location

Direction & Address
City: Diamond Bar

Building

Building Area
Building Area: 2334 Square Feet

HOA

No HOA

Lot Information

Lot Area: 7980.192 sqft

Listing Info

Special Conditions: Standard

Miscellaneous

Mls Number: 26840319

Additional Information

HOA Amenities: None
Last check for updates: about 15 hours ago
Listed by Lisa Soltesz DRE # 02280080, (480) 462-5392
Opendoor Brokerage Inc., (480) 462-5392
Bought with: Jiewen Pan DRE # 02101324, (626) 698-8867, Wetrust Realty, (626) 587-4866
Source: CLAW, MLS#26840319

Price History for 21408 Running River Ct

DatePriceEventSource
07/31/2026$1,265,000Sold
CLAW #26840319
07/07/2026$1,300,000PendingCLAW #26840319
05/29/2026$1,300,000Listed For SaleCLAW #26840319
04/27/2026$1,183,500Sold
N/A
07/12/2011$590,000Sold
N/A
01/17/2006$710,000Sold
N/A
06/20/2001$332,000Sold
N/A
08/04/1998$269,000Sold
N/A

Market trends in Diamond Bar

Last updated June 2026
Buyer'sMarketSeller'sMarket
Avg. sale price
$1.09M
$1.58KMoM
Sale-to-List Price
99.8%
Price per sq ft
$554
$7MoM
Available listings
198
34MoM
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Property Tax and Assessment

Year2025
Tax$9,487
Assessment$741,060
Home facts updated by county records

Comparable Sales for 21408 Running River Ct

Address
Distance
Property Type
Sold Price
Sold Date
Bed
Bath
Sqft
1919 White Star Dr, Diamond Bar, CA
0.10
Single-Family Home
$1,280,000
08/28/25
5
4
3,482
1923 White Star Dr, Diamond Bar, CA
0.12
Single-Family Home
$1,300,000
10/07/25
4
3
2,334
1754 Leaning Pine Dr, Diamond Bar, CA
0.14
Single-Family Home
$1,350,000
07/10/26
4
3
2,268
21415 Running River Ct, Diamond Bar, CA
0.04
Single-Family Home
$1,080,000
04/07/26
4
2
1,554
1739 Shadehill Pl, Diamond Bar, CA
0.33
Single-Family Home
$1,308,000
10/31/25
4
3
2,334
2102 Evergreen Springs Dr, Diamond Bar, CA
0.26
Single-Family Home
$1,328,000
09/09/25
5
3
2,468
2118 Tierra Loma Dr, Diamond Bar, CA
0.37
Single-Family Home
$1,315,000
03/31/26
5
3
2,468
1826 Wellspring Dr, Diamond Bar, CA
0.18
Single-Family Home
$1,152,000
10/29/25
4
2
1,708
1714 Roundtree Cir, Diamond Bar, CA
0.11
Single-Family Home
$890,000
11/04/25
3
2.5
1,338

Nearby homes

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Assigned Schools

These are the assigned schools for 21408 Running River Ct.
View nearby schools on GreatSchools
The GreatSchools Rating compares schools on a variety of school quality indicators including test scores, college readiness, equity and more. Learn more.

What Locals Say about Diamond Bar

At least 314 Trulia users voted on each feature.

  • 89 % Say it's dog friendly

  • 88 % Say there are sidewalks

  • 85 % Say car is needed

  • 80 % Say streets are well-lit

  • 78 % Say parking is easy

  • 77 % Say yards are well-kept

  • 74 % Say it's quiet

  • 66 % Say there's holiday spirit

  • 65 % Say people would walk alone at night

  • 64 % Say there's wildlife

  • 60 % Say they plan to stay for at least 5 years

  • 50 % Say kids play outside

  • 48 % Say it's walkable to grocery stores

  • 47 % Say neighbors are friendly

  • 45 % Say it's walkable to restaurants

  • 25 % Say there are community events

Sourced by Trulia users. Learn more about our methodology.
  • 4szj5yrwps
    "Diamond Bar, California, is a distinctive suburban community in eastern Los Angeles County, offering a unique blend of natural beauty, cultural diversity, and modern amenities. The city is characterized by its rolling hills, scenic landscapes, and well-maintained parks, providing residents with ample opportunities for outdoor recreation. Notable parks include Sycamore Canyon Park and Summitridge Park, both offering hiking trails with picturesque views of the San Gabriel Mountains.  The community’s cultural diversity is reflected in its vibrant culinary scene, featuring a wide array of international cuisines. Events such as the annual Family Festival showcase this diversity through live music, carnival games, and food vendors, fostering a strong sense of community among residents.  Education is a cornerstone of Diamond Bar the unique combination of natural beauty, cultural richness, educational excellence, and forward-thinking initiatives make it a standout community within the greater Los Angeles area."
    0
    Flag
  • Linda Correa
    "School district, bad traffic, no food variety, city does not help girls softball, no entertaining, safe neighborhood."
    0
    Flag
  • hubby pie
    "Safe and quiet. Many families live here and school district is top notch if you are in Walnut Valley Unified School District. That covers about half of Diamond Bar. The other district is good but not as good as Walnut."
    0
    Flag
  • Trulia User
    "Plenty of dog owners in the neighborhood. Everyone is polite to pick up their dogs poop as well as training friendly dogs."
    0
    Flag
  • hubby pie
    "Diamond Bar is a great city with plenty of parks, quiet neighborhoods and excellent shopping and dining. Schools are top notch."
    0
    Flag
  • hubby pie
    "Diamond Bar is a safe and friendly community. People care about the community and are proud of this community."
    2
    Flag
  • hubby pie
    "easy commute with two freeways passing through the community so access to LA, OC, and IE are as easy as it gets."
    0
    Flag
  • Madelynnpf
    "I lived in this neighborhood for almost 30 years and can’t imagine living anywhere else. It’s quiet and a great place to rise a family."
    1
    Flag
  • Alexis T.
    "Dogs are welcome in this neighborhood. Everyone cleans up after themselves, keeping the neighborhood tidy. The only thing I can think of is that there are sometimes mountain lions and hawks present which is dangerous for small dogs"
    12
    Flag
  • Romoguadalupe
    "there are many wonderful hiking trails in the area with beautiful views. If you love nature, you'll love DB. "
    1
    Flag
  • Deanna L. R.
    "The yearly Firework show in the park is always nice. The Diamond Bar birthday celebration is a lot of fun as well. "
    0
    Flag
  • Hemming L. A.
    "I’ve lived in this neighborhood for 40 years and it’s a great place to live. Lots of hiking trails and 30 minutes to downtown or the beach."
    0
    Flag
  • Nicholesaralegui
    "I like this place very family and friendly. kids have greats activity here in city. we live this place"
    0
    Flag
  • Lauren B.
    "Commute is not too bad. I drive my own vehicle. It only gets congested on Diamond Bar Blvd or Grand Ave but otherwise driving in Diamond Bar is pleasant "
    0
    Flag
  • Raymond W.
    "Diamond Bar is the safest city I’ve ever lived in. Also, it has many schools and parks! Very family oriented. "
    3
    Flag
  • Oryaan53
    "my family has lived in this neighborhood for 10plus years and its always been a nice quiet , safe and friendly place to live "
    1
    Flag
  • Shengbinmi
    "Some of them allow dogs to walk around by themselves in front of their houses, but the dogs are actually very friendly."
    0
    Flag
  • Trulia User
    "Lots of open space and parks. Lots of sidewalks with trees. There are pet friendly parks and houses. "
    1
    Flag
  • Evelyn G. D. L. C.
    "A lot of cars speed down Pathfinder, otherwise its a very safe neighborhood. The schools are good. Neighbors are friendly. "
    0
    Flag
  • Nicholesaralegui
    "we have amazing neighbors and love the community. the city offers a lot of family activities for everyone."
    0
    Flag
  • Vickiwj
    "Festival, movie night, fireworks, recreational activities, library events, many scenic trails, dog parks, "
    0
    Flag
  • Nicholesaralegui
    "the city is wonderful for family activities. we love this city and all it has to offer. its a great place to raise a family."
    0
    Flag
  • Hemming L. A.
    "I’ve lived here for 40 years. Plenty of hiking trails, 30 minutes from LA, 40 min from the beach. Good area."
    1
    Flag
  • Allyawsome01
    "Good transportation not too much traffic nice people nice area beautiful place to raise a family. Amazing schools"
    0
    Flag
  • Christine B.
    "My neighborhood is clean and has very respectable and friendly residents. I feel very safe living here."
    0
    Flag
  • Ashley S.
    "Driving is the main means of transportation. There is a metro station as well as bus stops. However, most people drive."
    0
    Flag
  • Wlcastellanos
    "Lots of places to walk your dog...plenty of parks. A few people do not pick up after their dogs but most do and care for the neighborhood."
    0
    Flag
  • Nathan Q.
    "We have young whipper snappers race their cars up and down the street at all hours of the night. As a community we all take turns calling the sheriffs department on them. "
    1
    Flag
  • Steveji1019
    "Neighborhood with quite a lot of Asian cultures. Schools are some of the best around. Middle class to upper middle class families. "
    0
    Flag
  • Tahir P.
    "I work in Diamond Bar, my job is less than 3 miles from my house, but still my commute is 15 minutes at times on a good day (no red lights) 7 mins is as fast as I can get to work which is awesome. Lots of cars on main roads (Grand and Diamond Bar) every morning. People going to schools /work. "
    1
    Flag
  • Joel P.
    "Diamond bar is perfectly located at the intersection of 3 major freeways. 57 ,60, and 10. and very close to the 210. I use all of these in my commute making Diamond bar ideal for my line of work. "
    1
    Flag
  • Christine
    "Summer movie nights, Fourth of July celebrations, avid long-time spirited Halloween, farmer’s markets. "
    0
    Flag
  • Ethan Y
    "Yes, they would like living in my area. There are many people walking their dogs in my community. But I don’t like dog barking"
    0
    Flag
  • Kenny O.
    "Quiet area, but be careful of home invasion robbers. Always closed garage doors, and entry points of your home."
    0
    Flag
  • Polly Anderson
    "There are frequent car crashes and dangerous drivers running red lights and just causing close calls."
    0
    Flag
  • Su S.
    "This is a Good place. Good high school near by. Neighborhood are friendly. I really love this community. Pet friendly. Easy to go freeway. "
    0
    Flag
  • Andy M
    "Not much. Just a bedroom community. But I like it the way it is. There have been little.changes in the past ten years other than two small new developments. "
    0
    Flag
  • Tahir P.
    "Cut down to 7 mins as opposed to 45-60 mins one way , the mornings can be a little annoying with the 2 minute signals on main roads"
    0
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Apartments for Rent

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Explore by feature - Pet Friendly

22 pet-friendly rentals in Diamond Bar, CA

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Explore by feature - Pool

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Explore by feature - Outdoor Space

18 rentals with an outdoor space in Diamond Bar, CA

Homes for sale near 21408 Running River Ct

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Off Market Homes Near 21408 Running River Ct

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© 2026 The MLS™ - Combined L.A. Westside MLS (CLAW). All rights reserved. Based on information from The MLS™ - Combined L.A. Westside MLS (CLAW as of 2026-08-05 14:39:15 PDT. 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. Properties may or may not be listed by the office/agent presenting the information. IDX information is provided exclusively for personal, non-commercial use, and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Information is deemed reliable but not guaranteed.
Some IDX listings have been excluded from this website.