3525 Castle Rock, Diamond Bar, California 91765, Diamond Bar, 91765 - 4 bed, 2 bath
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3525 Castle Rock
Diamond Bar, California 91765
ACTIVE
CONDITION: FAIR
4Beds
2Baths
1,521Sq Ft
7,949Lot Size
Property Price
LIST PRICE$995,000
EST. MARKET VALUE
$1,064,451
6% BelowMARKET VALUE
SUMMARY
This Single Family Residence represents a Strong Value Opportunity, listed at $995,000—positioned well below the $1,064,451 Fair Market Value by 6%. This valuation gap provides $69,451 in Instant Equity for the buyer. Featuring a Fair Condition Rating, the home includes a private swimming pool, dual-pane windows, and access to the Walnut Valley Unified School District. While the interior offers room for cosmetic modernization, the property’s large lot size and location make it an ideal acquisition for Buy-and-Hold Investors or Owner-Occupants seeking long-term value.
Estimated Market Value
$1,064,451+$69,451 Equity Potential
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 |
|---|---|---|---|---|---|---|
★ 3525 Castle Rock Subject | $995,000* List Price | 4 | 2 | 1,521 | $700 | - |
A 21245 Cold Spring Sold | $875,000 | 3 | 2 | 1,300 | $673 | 0.9 mi |
B 3528 Castle Rock Road Active | $1,150,000 List Price | 4 | 2 | 1,521 | $756 | 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 home features some functional upgrades like dual-pane windows and tile flooring. However, the bathroom cabinetry and fixtures appear dated (likely 20+ years old), and while the description mentions kitchen upgrades, the overall interior aesthetic suggests renovations are older than 15 years, placing it in the fair category needing cosmetic modernization.
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 = 7949, living area = 1521.
- Premier School District
The property is situated within the highly coveted Walnut Valley Unified School District, providing access to award-winning schools that significantly bolster long-term property value.
- Private Outdoor Amenities
Featuring a private inground swimming pool and scenic hill views, the home offers a desirable outdoor living space for entertainment and relaxation in a quiet neighborhood.
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.
- Significant Price Correction
A substantial price reduction from the original list price of $1.157M to $995K suggests initial market resistance and may impact buyer perception of the home's value.
- Vintage Footprint
Built in 1963 with 1,521 square feet of living space, the home may feature a more compartmentalized layout that lacks the expansive, open-concept feel of modern constructions.
About 3525 Castle Rock
This family home is located in the beautiful area of Diamond Bar, quiet neighborhood with many close retail shopping amenities, Dining and professional services, it is also located within the Walnut Valley Unified School District of award winning schools. This family home is a one story four bedroom two bath home, with flooring upgrades, dual pane windows, kitchen upgrades and many more. This home is also equipped with a private inground swimming pool.
Property Details
Public Facts
- Property Type
- Single Family Residence
- Year Built
- 1963
- Lot Size
- 7,949 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 | 2,280.2 |
| Lot Size | 7,949 | 9,961.367 |
| Price | $995.0K | $1.26M |
| Price per sq ft | $654 | $561 |
| Built year | 1963 | 1978 |
| HOA | $0 | $203 |
| Days on market | 44 | 49 |
Pricing History
Listed for Sale
Aug 19, 2026
$995,000
$1,157,000
-14% Price Drop
Initial Listing
Price Change
Jul 27, 2026
$1,157,000
Initial Listing