3528 Castle Rock Road, Diamond Bar, California 91765, Diamond Bar, 91765 - 4 bed, 2 bath
Loading property details...
3528 Castle Rock Road
Diamond Bar, California 91765
ACTIVE
CONDITION: FAIR
4Beds
2Baths
1,521Sq Ft
7,054Lot Size
Property Price
LIST PRICE$1,150,000
EST. MARKET VALUE
$1,114,187
3% AboveMARKET VALUE
SUMMARY
This Single-Story Residential Asset is a High-Potential Investment Opportunity, listed at $1,150,000—positioned well above the $1,114,188 Fair Market Value by -3%. While currently priced above market, the property features a Condition Rating of 4, offering significant upside through cosmetic modernization. Situated in the Walnut Valley Unified School District, this home boasts a private pool and a large corner lot. This property is an ideal acquisition for Buy-and-Hold Investors or Owner-Occupants seeking to leverage a premier location for long-term appreciation.
Estimated Market Value
$1,114,187
Based on Realkey algorithm analyzing recent comparable sales in Diamond Bar.
Comparable Sales Map
Comparables within 1 miles sold in recently
Map unavailable.
| Address | Sold Price | Beds | Baths | Sq Ft | $/Sqft | Distance |
|---|---|---|---|---|---|---|
★ 3528 Castle Rock Road Subject 4 bd · 2 ba · 1,521 sqft · $733 | $1,150,000* List Price | 4 | 2 | 1,521 | $733 | - |
A 2726 Castle Rock Sold 3 bd · 2 ba · 1,300 sqft · $715 · 1.0 mi | $930,000 | 3 | 2 | 1,300 | $715 | 1.0 mi |
B 21245 Cold Spring Sold 3 bd · 2 ba · 1,300 sqft · $673 · 0.9 mi | $875,000 | 3 | 2 | 1,300 | $673 | 0.9 mi |
C 3525 Castle Rock Active 4 bd · 2 ba · 1,521 sqft · $654 · 0.0 mi | $995,000 List Price | 4 | 2 | 1,521 | $654 | 0.0 mi |
* Subject property listed price vs sold prices of comps.
Condition Analysis
See Full ReportOVERALL CONDITION SCORE
Fair
TeardownExcellent
Property is moderate renovation needed.
Built in 1963, this 63-year-old home appears well-maintained and functional but is clearly dated. Interior images show older painted hallway cabinets and a bathroom with vintage laminate countertops and older fixtures. While move-in ready and clean, the property requires cosmetic updates and modernization throughout.
PROSSTRENGTHS & OPPORTUNITIES
- High Available Lot Utilization
The property has a large lot size, which is more than 4 times of its living area. lot size in square feet = 7054, living area = 1521.
- Premier School District
The property is situated within the highly acclaimed Walnut Valley Unified School District, a major draw for families that significantly bolsters long-term resale value.
- Outdoor Amenities
Featuring a private backyard with a sparkling pool on a desirable corner lot, the home offers an ideal space for outdoor living and entertainment.
CONSRISKS & DEFICIENCIES
- MLS Listing Discrepancy
Bedroom count discrepancy between mls listing and other public or private record. mls listing bedroom count = 4, other record bedroom count = 3.
- Market Stagnation
With 50 days on the market and a recent price reduction, the property may be struggling to compete with current market inventory at its current price point.
- Vintage Infrastructure
Built in 1963, the residence likely requires modernization of its core systems or interior finishes to meet the expectations of contemporary luxury buyers.
About 3528 Castle Rock Road
Welcome to 3528 Castle Rock Road, a charming 4-bedroom, 2-bathroom single-story corner lot home in south Diamond Bar. This inviting residence offers a bright and functional floor plan with comfortable living spaces, a cozy fireplace, and abundant natural light throughout. Step outside to your own private backyard featuring a sparkling pool, perfect for relaxing or entertaining family and friends. Conveniently located near shopping, dining, parks, and major freeways, this home is also within the highly acclaimed Walnut Valley Unified School District.
Property Details
Public Facts
- Property Type
- Single Family Residence
- Year Built
- 1963
- Lot Size
- 7,054 Sq. Ft.
Interior
- Total Bedrooms
- 4
- Total Bathrooms
- 2 (2 Full, 0 Half)
Exterior & Parking
No exterior & parking available.
Utilities & Misc
- HOA Fee
- $0 / Month
Neighborhood Insights
Sensitive Facilities
No sensitive facilities data found.
Neighborhood Comparison
| Feature | Subject | Average Home |
|---|---|---|
| Beds | 4.0 | 4.0 |
| Baths | 2.0 | 3.0 |
| Square foot | 1,521 | 2,325.519 |
| Lot Size | 7,054 | 10,258.123 |
| Price | $1.15M | $1.27M |
| Price per sq ft | $756 | $559 |
| Built year | 1963 | 1978 |
| HOA | $0 | $207 |
| Days on market | 79 | 56 |
Pricing History
Listed for Sale
Aug 19, 2026
$1,150,000
$1,180,000
-3% Price Drop
Initial Listing
Price Change
Aug 6, 2026
$1,180,000
Initial Listing