This home goes beyond cosmetic updates with a complete infrastructure overhaul *** Electrical - upgraded 200Amp MAIN PANEL & whole-house WIRE REPLACEMENT *** Plumbing - full re-piping with durable Type-L COPPER *** New Insulation throughout the entire house & garage paired with New HVAC Ducting *** Interior defined by quality & safety, featuring ALL NEW FIRE-CODE drywall and ceilings, ALL NEW energy-efficient windows and patio door *** The chef-inspired kitchen showcases European-style cabinets, sleek Quartz countertop, an 18-gauge stainless steel single sink & all New appliances *** the curb appeal is enhanced by fresh paint, new garage door, new seamless gutters and a refurbished roof with new felt paper & reset tiles *** RV Parking available *** The backyard includes mature fruit trees and an established pool ready for its new owner’s personal touch *** easy access to freeway *** few minutes to market and school *** it's NOT a flip house *** Transformed 5-beds, 3-baths, Single-Story home, located in the highly sought-after Walnut School District. *** The residence has been renovated down to the studs, offering the peace of mind of a Brand-New home with the character of an established neighborhood. ***
For sale
Listing Provided by: Pacific Sterling Realty
Price cut: $22K (3/4)
$1,428,000
21030 Riego Dr, Diamond Bar, CA 91765
5beds
2,157sqft
Est.:
Single Family Residence
Built in 1980
8,312 Square Feet Lot
$1,406,100 Zestimate®
$662/sqft
$-- HOA
What's special
New garage doorNew seamless guttersChef-inspired kitchenRv parking availableEstablished poolNew hvac ductingSleek quartz countertop
- 47 days |
- 2,218 |
- 64 |
Zillow last checked: 7 hours ago
Listing updated: March 11, 2026 at 12:22pm
Listing Provided by:
Yingqi Guan DRE #01989489 626-991-3801,
Pacific Sterling Realty
Source: CRMLS,MLS#: TR26018437
Originating MLS: California Regional MLS
Originating MLS: California Regional MLSTour with a local agent
Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 5
- Bathrooms: 3
- Full bathrooms: 3
- Main level bathrooms: 3
- Main level bedrooms: 5
Rooms
- Room types: Bedroom, Great Room, Kitchen, Laundry, Primary Bedroom, Other
Primary bedroom
- Features: Main Level Primary
Bedroom
- Features: All Bedrooms Down
Bedroom
- Features: Bedroom on Main Level
Bathroom
- Features: Bathroom Exhaust Fan, Bathtub, Full Bath on Main Level, Quartz Counters, Remodeled, Tub Shower
Kitchen
- Features: Kitchen Island, Kitchen/Family Room Combo, Quartz Counters, Remodeled, Updated Kitchen
Other
- Features: Walk-In Closet(s)
Heating
- Central
Cooling
- Central Air
Appliances
- Included: Dishwasher, Gas Oven, Gas Water Heater, Range Hood
- Laundry: Laundry Room
Features
- Breakfast Bar, Quartz Counters, Recessed Lighting, All Bedrooms Down, Bedroom on Main Level, Main Level Primary, Walk-In Closet(s)
- Flooring: Vinyl
- Has fireplace: Yes
- Fireplace features: Great Room
- Common walls with other units/homes: No Common Walls
Interior area
- Total interior livable area: 2,157 sqft
Property
Parking
- Total spaces: 3
- Parking features: Door-Multi, Direct Access, Driveway, Garage Faces Front, Garage, Garage Door Opener, Private, RV Access/Parking
- Attached garage spaces: 3
Features
- Levels: One
- Stories: 1
- Entry location: 1
- Exterior features: Rain Gutters
- Has private pool: Yes
- Pool features: Private
- Has view: Yes
- View description: None
Lot
- Size: 8,312 Square Feet
- Features: 0-1 Unit/Acre, Back Yard, Front Yard, Sprinkler System
Details
- Parcel number: 8765013018
- Special conditions: Standard
Construction
Type & style
- Home type: SingleFamily
- Property subtype: Single Family Residence
Materials
- Copper Plumbing
Condition
- New construction: No
- Year built: 1980
Utilities & green energy
- Sewer: Public Sewer
- Water: Public
Community & HOA
Community
- Features: Suburban, Sidewalks
- Security: Carbon Monoxide Detector(s), Fire Rated Drywall, Smoke Detector(s)
Location
- Region: Diamond Bar
Financial & listing details
- Price per square foot: $662/sqft
- Tax assessed value: $1,009,800
- Annual tax amount: $12,703
- Date on market: 1/26/2026
- Cumulative days on market: 47 days
- Listing terms: Cash,Conventional
Estimated market value
$1,406,100
$1.34M - $1.48M
$4,505/mo
Price history
Price history
| Date | Event | Price |
|---|---|---|
| 3/4/2026 | Price change | $1,428,000-1.5%$662/sqft |
Source:  CRMLS #TR26018437 Report a problem | ||
| 2/20/2026 | Price change | $1,449,9990%$672/sqft |
Source: CRMLS #TR26018437 Report a problem | ||
| 1/26/2026 | Listed for sale | $1,450,000+46.5%$672/sqft |
Source: CRMLS #TR26018437 Report a problem | ||
| 4/25/2024 | Sold | $990,000$459/sqft |
Source: Public Record Report a problem | ||
Public tax history
Public tax history
| Year | Property taxes | Tax assessment |
|---|---|---|
| 2025 | $12,703 +185.2% | $1,009,800 +205% |
| 2024 | $4,454 +2.3% | $331,101 +2% |
| 2023 | $4,353 +2.2% | $324,610 +2% |
| 2022 | $4,261 +2% | $318,246 +2% |
| 2021 | $4,175 +1.2% | $312,007 +1% |
| 2020 | $4,124 | $308,809 +2% |
| 2019 | $4,124 +8.1% | $302,755 +2% |
| 2018 | $3,814 | $296,820 +2% |
| 2017 | $3,814 +4.6% | $291,001 +2% |
| 2016 | $3,646 +3.3% | $285,296 +1.5% |
| 2015 | $3,529 -0.7% | $281,011 +2% |
| 2014 | $3,553 | $275,508 +2.5% |
| 2012 | -- | $268,886 +2% |
| 2011 | -- | $263,615 +0.8% |
| 2010 | -- | $261,645 -0.2% |
| 2009 | -- | $262,267 +2% |
| 2008 | -- | $257,126 +2% |
| 2007 | -- | $252,085 +2% |
| 2006 | -- | $247,143 |
| 2005 | -- | $247,143 +4% |
| 2004 | -- | $237,548 +1.9% |
| 2003 | -- | $233,195 +2% |
| 2002 | -- | $228,624 +4% |
| 2000 | -- | $219,748 |
Find assessor info on the county website
BuyAbility℠ payment
Est. payment
$8,305/mo
Principal & interest
$6901
Property taxes
$1404
More affordability tools
Climate risks
Neighborhood: 91765
Nearby schools
GreatSchools rating
- 10/10Castle Rock Elementary SchoolGrades: K-5Distance: 0.2 mi
- 9/10South Pointe Middle SchoolGrades: 6-8Distance: 1.3 mi
- 10/10Diamond Bar High SchoolGrades: 9-12Distance: 0.6 mi
Schools provided by the listing agent
- Elementary: Castle Rock
- Middle: Southpoint
- 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.
Local experts in 91765
- California
- Los Angeles County
- Diamond Bar
- 91765
- 21030 Riego Dr
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