1578 San Bernardino, Costa Mesa, California 92627, Costa Mesa, 92627 - 6 bed, 6 bath
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1578 San Bernardino
Costa Mesa, California 92627
ACTIVE
CONDITION: EXCELLENT
6Beds
6Baths
4,000Sq Ft
7,841Lot Size
Property Price
LIST PRICE$3,500,000
EST. MARKET VALUE
$4,184,717
16% BelowMARKET VALUE
SUMMARY
This Residential Income Duplex represents a High-Potential Investment Opportunity, listed at $3,500,000—positioned slightly above the $3,337,316 Fair Market Value. Featuring a 2025 renovation and a Condition Rating of 2, this Frank Gehry-inspired property includes a 1,000 sq. ft. ADU and private lap pool. With proximity to Newport Harbor High School and ocean views, it offers a unique blend of luxury lifestyle and rental income. This property is an ideal acquisition for Buy-and-Hold Investors or Owner-Occupants seeking a sophisticated, income-generating coastal residence.
Estimated Market Value
$4,184,717+$684,717 Equity Potential
Based on Realkey algorithm analyzing recent comparable sales in Costa Mesa.
Comparable Sales Map
Comparables within 1 miles sold in recently
Map unavailable.
| Address | Sold Price | Beds | Baths | Sq Ft | $/Sqft | Distance |
|---|---|---|---|---|---|---|
★ 1578 San Bernardino Subject | $3,500,000* List Price | 6 | 6 | 4,000 | $1,046 | - |
A 180 Rochester Street Active | $2,999,995 List Price | 0 | 0 | 3,325 | $902 | 0.6 mi |
* Subject property listed price vs sold prices of comps.
Condition Analysis
See Full ReportOVERALL CONDITION SCORE
Excellent
TeardownExcellent
Property is new construction or fully renovated.
Although originally built in 2004, the property was extensively remodeled and expanded in 2025. The kitchens and bathrooms feature brand-new modern cabinetry, quartz/marble-style countertops, and contemporary fixtures. The presence of new mini-split HVAC systems and mint-condition interior finishes throughout both the main house and the new ADU meet the criteria for a recent high-end renovation.
PROSSTRENGTHS & OPPORTUNITIES
- Significant Income Potential
The property includes a legal 1,000 sq. ft. attached ADU with 2 bedrooms and 2 bathrooms that can generate approximately $3,500 in monthly rent, providing a substantial mortgage offset or investment return.
- Modern Architectural Design
Updated and expanded in 2025, this Frank Gehry-inspired contemporary home features high-volume ceilings and a seamless indoor-outdoor flow, offering a unique and sophisticated aesthetic.
- Luxury Amenities and Views
The residence boasts a private lap pool, spa, and rare ocean views, situated in the prestigious Eastside Costa Mesa area near top-rated schools and coastal breezes.
CONSRISKS & DEFICIENCIES
- MLS Listing Discrepancy
Lot size discrepancy between mls listing and other public or private record. mls listing lot size in square feet =7841, other record lot size in square feet = 7515. Living area discrepancy between mls listing and other public or private record. mls listing living area = 4000, other record living area = 1200. Bedroom count discrepancy between mls listing and other public or private record. mls listing bedroom count = 4, other record bedroom count = 2.
- High Price Point
At a $3.5 million list price, the property is positioned at the top of the local market, which may limit the pool of qualified buyers despite its luxury upgrades and income potential.
- Irregular Lot Shape
The pie-shaped cul-de-sac lot configuration can result in uneven yard distribution, potentially limiting the utility of the outdoor space compared to a standard rectangular lot.
About 1578 San Bernardino
Welcome to this Magnificently rebuilt legal duplex on a large pie-shaped Cul-de-Sac lot in Stylish Contemporary Italian Architecture and Design built in 2004 and updated and expanded in 2026 this Frank Gehry inspired look is both flexible and versatile with high volume /open areas where the traditional boundary between indoor and outdoor is at the same time breached and joined. Remodeled/Reimagined/Resurgent maximizing space while incorporating modern conveniences seeking to integrate the surrounding suburban landscape into an Abode which will have you either considering continuous entertaining or a life of a Hermit. In addition, while the Main Unit features 4 bedrooms +Office with 3.5Baths and the attached ADU featuring 2Bd 2Ba 2story 1000 sq. ft. that can easily rent for $3500 or act as a Mother -in-Law apartment the specialness will become apparent at your first visit. The Bedrooms each have individual AC units so that the climate control can be "Individualized" for each inhabitant w/o compromising comfort. A private lap pool and Spa +Outdoor Shower will make your "luxury" moments enjoyable and addictive. The attached 3 Car Garage adds a measure of convenience that will instantly be appreciated. Minutes away from both the Beach{sea breezes} and the Freeway this conveniently situated Home "checks all the boxes" and will inspire you for a long time,.
Property Details
Public Facts
- Property Type
- Duplex
- Year Built
- 2004
- Lot Size
- 7,841 Sq. Ft.
Interior
- Total Bedrooms
- 6
- Total Bathrooms
- 6 (6 Full, 0 Half)
Exterior & Parking
No exterior & parking available.
Utilities & Misc
- HOA Fee
- $0 / Month
Neighborhood Insights
Costa Mesa Unified Schools
Mariners Elementary School
Grades PK-6 • 0.8 mi
8/10
Woodland Elementary School
Grades PK-2 • 1.2 mi
0/10
Heinz Kaiser Elementary School
Grades 3-6 • 1.4 mi
8/10
Sensitive Facilities
No sensitive facilities data found.
Neighborhood Comparison
| Feature | Subject | Average Home |
|---|---|---|
| Beds | 6.0 | 4.1 |
| Baths | 6.0 | 3.3 |
| Square foot | 4,000 | 2,378.222 |
| Lot Size | 7,841 | 7,156.444 |
| Price | $3.50M | $2.04M |
| Price per sq ft | $875 | $780 |
| Built year | 2004 | 1962 |
| HOA | $0 | $0 |
| Days on market | 45 | 65 |
Pricing History
Listed for Sale
Jul 26, 2026
$3,500,000
Initial Listing
Sold
Sep 5, 2001
$350,000
Public Record