21725 Lost River, Diamond Bar, CA 91765
21725 Lost River, Diamond Bar, CA 91765
Property Description
Beautifully Remodeled Single-Story Home in the Heart of Diamond Bar! Welcome to 21725 Lost River Dr., Diamond Bar, a beautifully renovated single-story home offering 4 bedrooms plus a private office, 2.5 bathrooms, and approximately 1,813 sq. ft. of comfortable living space. This move-in-ready home has been fully remodeled with quality upgrades throughout, including a brand-new roof, new interior and exterior paint, new water piping, new central A/C system, and new insulation, providing comfort, efficiency, and peace of mind for years to come. The functional floor plan features bright and spacious living areas, generously sized bedrooms, and a dedicated office that's perfect for working from home, studying, or creating a flex space to fit your lifestyle. Situated on a desirable lot with a large front yard and spacious backyard, this property offers plenty of room for entertaining, gardening, children to play, or simply relaxing outdoors. Conveniently located within walking distance to Diamond Bar High School, Evergreen Elementary School, and the popular H Mart shopping plaza, you'll enjoy easy access to shopping, dining, parks, and everyday conveniences. Located in the highly acclaimed Walnut Valley Unified School District, this home is an exceptional opportunity for families seeking top-rated schools.
Features & Amenities
Property Details
Mortgage Calculator
Current Rates
Comparative Market Analysis
Residential Tier · 5 active · 5 closed
Diamond Bar · Single Family Residence
Listed 14.4% above the median closed sale of $1,100,000. Price per sqft ($694) is a 24% premium to closed comps ($560).
Price Position
Positioned above the market — commands a premium.
Active Properties (5)
Active Comparables
| Address | City | Year | BD | BTH | SqFt | LotSz | LP/SqFt | LP | DIM | Score |
|---|---|---|---|---|---|---|---|---|---|---|
| 1118 Clorinda | Diamond Bar | 1965 | 4 | 3 | 1,714 | 6,658 | $652 | $1.12M | 41 | 94 |
| 21206 Silver Cloud | Diamond Bar | 1962 | 4 | 2 | 1,768 | 7,424 | $615 | $1.09M | 68 | 93 |
| 20744 Earlgate | Diamond Bar | 1965 | 5 | 2 | 1,753 | 8,442 | $592 | $1.04M | 4 | 91 |
| 211 Benicia Road | Diamond Bar | 1961 | 4 | 2 | 1,640 | 8,142 | $548 | $899,000 | 75 | 91 |
| 21325 Hipass Drive | Diamond Bar | 1962 | 4 | 4 | 1,810 | 7,421 | $663 | $1.20M | 46 | 91 |
| Total: 5 · Average | 4.2 | 2.6 | 1,737 | 7,617.4 | $614 | $1.07M | 46.8 | |||
| Median | 1,753 | $1.09M | ||||||||
Closed Properties (5)
Closed Comparables
| Address | City | Year | Date | BD | BTH | SqFt | LotSz | LP | SP | SP/SqFt | SP/LP | DIM | Score |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2115 Tierra Loma Drive | Diamond Bar | 1963 | 09/09/2026 | 4 | 3 | 1,823 | 11,401 | $1.27M | $1.23M | $677 | 0.97 | 49 | 93 |
| 1109 Overlook Ridge | Diamond Bar | 1968 | 08/13/2026 | 4 | 3 | 2,021 | 7,592 | $1.15M | $1.15M | $567 | 1.00 | 159 | 92 |
| 1640 Aspen Grove Lane | Diamond Bar | 1968 | 08/28/2026 | 4 | 2 | 1,889 | 8,208 | $1.15M | $1.08M | $572 | 0.94 | 148 | 91 |
| 1100 Reno Ridge | Diamond Bar | 1968 | 07/20/2026 | 4 | 3 | 2,002 | 9,832 | $1.10M | $1.10M | $549 | 1.00 | 52 | 91 |
| 1160 Del Sol | Diamond Bar | 1968 | 09/04/2026 | 4 | 2 | 1,994 | 8,963 | $950,000 | $870,000 | $436 | 0.92 | 100 | 90 |
| Total: 5 · Average | 4.0 | 2.6 | 1,945.8 | 9,199.2 | $1.09M | $1.09M | $560.2 | — | 101.6 | ||||
| Median | 1,994 | $1.10M | $1.10M | ||||||||||
Market Analysis
List vs Sale $/SqFt
Sale Price Trend
Days on Market
Sale vs List Price
This analysis was generated automatically from MLS data. For an in-depth, human-reviewed valuation, contact Joseph Sardella at josephsardella@gmail.com.