640 Old Mill Road, San Marino, California 91108, San Marino, 91108 - 4 bed, 3 bath
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640 Old Mill Road
San Marino, California 91108
ACTIVE
CONDITION: GOOD
4Beds
3Baths
2,980Sq Ft
7,885Lot Size
Property Price
LIST PRICE$2,725,000
EST. MARKET VALUE
$2,896,558
5% BelowMARKET VALUE
SUMMARY
This Spanish-style residence represents a High-Potential Investment Opportunity, listed at $2,849,000—positioned above the $2,712,523 Fair Market Value. While priced at a premium, the property offers a Condition Rating of 3, featuring a beautifully refurbished interior with exposed beam ceilings and hardwood floors. Located in the highly acclaimed San Marino School District, the home provides a private outdoor spa and a flexible basement. This is an exceptional acquisition for discerning homeowners or long-term investors seeking a prestigious, move-in ready asset in a top-tier neighborhood.
Estimated Market Value
$2,896,558+$171,558 Equity Potential
Based on Realkey algorithm analyzing recent comparable sales in San Marino.
Comparable Sales Map
Comparables within 1 miles sold in recently
Map unavailable.
| Address | Sold Price | Beds | Baths | Sq Ft | $/Sqft | Distance |
|---|---|---|---|---|---|---|
★ 640 Old Mill Road Subject | $2,725,000* List Price | 4 | 3 | 2,980 | $972 | - |
A 1874 S Euclid Avenue Sold | $2,700,000 | 4 | 3 | 2,662 | $1,014 | 0.3 mi |
B 1620 S Euclid Avenue Sold | $2,635,500 | 3 | 3 | 2,258 | $1,167 | 0.2 mi |
C 1730 S Euclid Avenue Sold | $2,850,000 | 4 | 3 | 2,630 | $1,084 | 0.2 mi |
D 2225 El Molino Place Sold | $2,600,000 | 3 | 3 | 2,641 | $984 | 0.7 mi |
E 2136 S El Molino Active | $3,280,000 List Price | 5 | 4 | 3,095 | $1,060 | 0.6 mi |
* Subject property listed price vs sold prices of comps.
Condition Analysis
See Full ReportOVERALL CONDITION SCORE
Good
TeardownExcellent
Property is move-in ready.
While originally built in 1929, the property has been 'beautifully refurbished' with thoughtful modern updates. The inclusion of updated HVAC systems, recessed lighting, and well-maintained hardwood floors indicates a renovation likely within the 5-15 year range. The home is move-in ready with functional, updated living spaces that preserve historic character while meeting modern standards.
PROSSTRENGTHS & OPPORTUNITIES
- Prime Location & Schools
Situated in the highly acclaimed San Marino School District, this property offers access to top-tier education in one of Southern California's most prestigious and sought-after neighborhoods.
- Historic Architectural Charm
This 1929 Spanish-style residence features timeless details like exposed beam ceilings and original hardwood floors, beautifully preserved through a thoughtful refurbishment that maintains its classic character.
- Modernized Comforts
The home blends historic appeal with essential modern updates, including an updated HVAC system and a private outdoor courtyard featuring a spa, ideal for contemporary living and entertaining.
CONSRISKS & DEFICIENCIES
- Limited Lot Size
At 7,885 square feet, the lot size is relatively compact for the San Marino market, which may limit potential for significant outdoor expansion or extensive landscaping.
- Bathroom-to-Bedroom Ratio
With 2.5 bathrooms serving 4 bedrooms, the ratio may be considered low for modern luxury standards and could be a drawback for larger families.
About 640 Old Mill Road
Nestled along a picturesque tree-lined street, this beautifully refurbished Spanish-style residence blends timeless architectural character with thoughtful modern updates. Situated on a 7,885 sqft lot within the highly acclaimed San Marino School District, the home offers 2,980 sqft of living space, featuring 4 bedrooms & 2.5 bathrooms. Rich in original detail, the home showcases beautiful hardwood flooring and exposed beam accents that reflect the craftsmanship and charm. The inviting living room features gas & wood burning fireplace and the family room looks out to the charming courtyard. Thoughtfully updated to preserve its historic character while enhancing everyday comfort, the home includes updated HVAC systems and well maintained living spaces. An approximate 150 sqft basement provides additional storage or flexible-use space. The private outdoor setting offers tranquil retreat with a spa, ideal for entertaining. A detached garage complements the property while maintaining the homes classic architectural appeal. This is an exceptional opportunity in one of the area's most sought-after neighborhoods.
Property Details
Public Facts
- Property Type
- Single Family Residence
- Year Built
- 1929
- Lot Size
- 7,885 Sq. Ft.
Interior
- Total Bedrooms
- 4
- Total Bathrooms
- 3 (3 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 | 4.1 |
| Baths | 3.0 | 3.8 |
| Square foot | 2,980 | 3,129.462 |
| Lot Size | 7,885 | 14,189.885 |
| Price | $2.73M | $3.12M |
| Price per sq ft | $914 | $1.1K |
| Built year | 1929 | 1945 |
| HOA | $0 | $0 |
| Days on market | 43 | 45 |
Pricing History
Listed for Sale
Sep 4, 2026
$2,725,000
$2,849,000
-4% Price Drop
Initial Listing
Price Change
Jul 28, 2026
$1,849,000
Initial Listing
Price Change
Jul 28, 2026
$2,849,000
Initial Listing