21380 Chirping Sparrow Road
Diamond Bar, CA 91765
Listing broker / agent: First Class Platinum Brokers · Pedro Torres Jr. · 323-440-8113 · CRMLS
MLS # DW26185739 · Last checked Oct 20, 2026 01:49 UTC
About this property
Prime South Diamond Bar Fixer with Endless Potential in Award-Winning School District! Brought to market with incredible potential, this spacious two-story home located in a highly desirable South Diamond Bar neighborhood is ready for your creative vision and personal touches. Situated on a generous 0.37-acre lot with no common walls, this floor plan offers 3,073 square feet of comfortable living space featuring 5 bedrooms, 3 bathrooms, and a massive upstairs bonus room. The main level welcomes you with high cathedral ceilings at the entry and living room, a formal dining area, a convenient main-floor bedroom with a full bath, and an open-concept kitchen flowing directly into the family room with a cozy fireplace and French doors. Additional highlights include an attached 3-car garage (featuring a permitted bonus study room conversion space). Step outside to discover a private, sprawling backyard complete with a pool/spa, covered patio, and an elevated hillside path leading up to a gazebo with incredible local views. While the home requires cosmetic updating and TLC throughout, its solid bones, prime location just minutes from top-rated schools (Castle Rock Elementary, South Pointe Middle, and Diamond Bar High), shopping plazas (including H Mart), and easy access to the 57 and 60 freeways make this a rare diamond in the rough. Bring your contractors, designers, and imagination to transform this property into your dream estate!
Property details
- MLS number
- DW26185739
- Status
- Active
- Type
- Residential
- Subtype
- Single Family Residence
- Beds / baths
- 5 Beds • 3 Baths
- Living area
- 3,073 Sq Ft
- Lot size
- 0.3733 acres
- County
- Los Angeles
- Year built
- 1980
- Stories
- 2
More property detailsCollapse
Listing
- Days on market
- 26
Building
- Year built
- 1980
- Year built source
- Assessor
- Architectural style
- Custom, Traditional
- Stories
- 2
- Building stories
- 1
- Levels
- Two
- Entry level
- 1
- Living area source
- Assessor
Bathrooms
- Full bathrooms
- 3
- Half bathrooms
- 0
- Three-quarter bathrooms
- 0
- Quarter bathrooms
- 0
Rooms & interior
- Main-level bedrooms
- 1
- Main-level bathrooms
- 1
- Rooms
- Bonus Room, Bedroom, Converted Bedroom, Family Room, Foyer, Kitchen, Laundry, Living Room, Primary Bedroom, Other, Dining Room
- Appliances
- Dishwasher, Free Standing Range, Disposal, Microwave
- Interior features
- Breakfast Area, Separate Formal Dining Room, High Ceilings, Open Floorplan, Recessed Lighting, Two Story Ceilings, All Bedrooms Up, Bedroom On Main Level, Entrance Foyer, Main Level Primary, Walk In Closets
- Flooring
- Carpet, Tile, Wood
- Heating
- Central, Forced Air, Natural Gas
- Cooling
- Central Air
- Fireplace
- Family Room, Wood Burning
- Laundry
- Laundry Room
Exterior & parking
- Total parking spaces
- 3
- Garage spaces
- 3
- Attached garage
- Yes
- Pool
- Heated, In Ground, Private
- Spa
- In Ground, Private
- Patio / porch
- Covered, Patio
- Lot features
- Sloped Down
- Lot size source
- Assessor
- Fencing
- Privacy
- Property outlook
- Hills, Neighborhood
Utilities & community
- Water
- Public
- Sewer
- Public Sewer
- Community features
- Street Lights, Suburban, Sidewalks
Fees & lease terms
- Association
- No
- Association fee
- $0.00
Schools reported in the listing
- High school
- Diamond Bar
- High school district
- Walnut Valley Unified
School information is supplied with the listing. Confirm current attendance boundaries and enrollment eligibility directly with the school district.
Nearby public schools
Nearby does not mean assigned. These are approximate straight-line distances from the property, not walking or driving routes. Confirm attendance boundaries, enrollment eligibility, grades and current school status directly with the district.
| School / district | Grades | Distance |
|---|---|---|
| Castle Rock Elementary (school website, opens in a new tab) Walnut Valley Unified · Diamond Bar | K–5 | 0.7 mi |
| Evergreen Elementary (school website, opens in a new tab) Walnut Valley Unified · Diamond Bar | K–5 | 1.2 mi |
| Diamond Bar High (school website, opens in a new tab) Walnut Valley Unified · Diamond Bar | 9–12 | 1.4 mi |
| South Pointe Middle (school website, opens in a new tab) Walnut Valley Unified · Walnut | 6–8 | 2.0 mi |
| Shelyn Elementary Rowland Unified · Rowland Heights | K–6 | 2.4 mi |
| Maple Hill Elementary (school website, opens in a new tab) Walnut Valley Unified · Diamond Bar | K–5 | 2.5 mi |
| Ybarra Academy for the Arts and Technology Rowland Unified · Walnut | K–8 | 2.6 mi |
| Chaparral Middle (school website, opens in a new tab) Walnut Valley Unified · Diamond Bar | 6–8 | 2.7 mi |
Source: California Department of Education · 2025-26 school locations. Downloaded Oct 2, 2026 UTC. This annual snapshot may not reflect later changes. Public schools only; not a complete list of education options. No ratings or attendance assignments are provided.
Check the California School Directory ↗Price and tax history
Asking price
- Current asking price
- $1,399,998
- MLS-reported original asking price
- $1,399,999
- MLS-reported previous asking price
- $1,399,999
- MLS-reported last price change
- 2026-09-09 16:43 UTC
| Observed (UTC) | Asking price |
|---|---|
| Oct 2, 2026 05:47 | $1,399,998 |
MLS values are reported for this listing, not prior sales. Observation dates show when our importer saw an asking price, not when the MLS changed it. Up to 24 observations are retained; changes between refreshes may be missed. This is not a complete price or sales history.
Property taxes
Tax history is not available from the imported listing data.
Source: MLS feed. Only supplied tax years are shown, up to 10 years; this is not a county tax archive. Amounts may be corrected and taxes may change after purchase. Verify assessments and current taxes with the county. These values do not automatically fill the payment calculator.
Market trends in Diamond Bar
Active residential homes for sale in Diamond Bar, CA, available through this website's authorized feed. Includes residential subtypes; excludes rentals. Not the entire market or a valuation of this property.
Observed price activity · past 30 days
23 currently active listings have an observed price-change pair ending in this period. A listing can appear in both counts.
Calculated 2026-10-20 02:21 UTC. Source: this website's authorized MLS inventory. Import progress, freshness rules and coverage affect the figures. Medians exclude missing/invalid values; price per sq ft is the median of individual listing ratios. Price observations are limited to the last 24 per listing and may miss changes between refreshes. This is not a complete 30-day market report, historical inventory trend, appreciation measure, or sold-price analysis.
Payment calculator
Explore a fixed-rate loan scenario. The price comes from this listing; a 20% down payment and 30-year term are starting assumptions, not requirements. Enter your own interest rate—not APR—and estimated costs.
Illustration only—not a rate quote, preapproval, lending offer or affordability determination. Assumes equal monthly payments on a fully amortizing fixed-rate loan; no adjustable rates, interest-only periods or balloon payments. Excludes closing costs, utilities, maintenance, special assessments and other unentered costs. Actual payments and escrow can differ. Review a Loan Estimate with your lender.
Understanding homeownership costs — CFPB ↗