22 22 Calle Del Casarillo, Diablo, California 94528, Diablo, 94528 - 6 bed, 6 bath
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Diablo, California 94528
This Luxury Dual-Residence Estate is listed at $4,122,000, representing a premium turnkey asset positioned near its $3,937,174 Fair Market Value. Boasting an Excellent Condition Rating, the property features an extensive high-end remodel with European white oak floors, vaulted ceilings, and integrated smart home technology. The half-acre grounds offer a resort-style pool and spa alongside a fully independent second residence, providing rare versatility. Located within the elite San Ramon Valley School District and zoned for Monte Vista High (10/10), this estate is a perfect match for multi-generational families or luxury owner-occupants.
Comparables within 1 miles sold in recently
| Address | Sold Price | Beds | Baths | Sq Ft | $/Sqft | Distance |
|---|---|---|---|---|---|---|
★ 22 22 Calle Del Casarillo Subject | $3,985,000* List Price | 6 | 6 | 4,246 | $916 | - |
A 1826 Alameda Diablo Sold | $3,650,000 | 5 | 5 | 4,995 | $731 | 0.5 mi |
B 1953 La Cadena Sold | $4,900,000 | 6 | 6 | 5,306 | $923 | 0.2 mi |
* Subject property listed price vs sold prices of comps.
Property is new construction or fully renovated.
The property has undergone an extensive, high-end professional renovation that brings it to current luxury standards. Key features include European white oak flooring, vaulted ceilings, modern linear fireplaces with custom built-ins, and a gourmet kitchen with a large stone island and premium appliances. The integration of smart home technology, designer light fixtures, and a fully independent guest residence, combined with the pristine condition of the resort-style exterior, justifies an excellent rating despite the original 1972 build date.
The property has a large lot size, which is more than 4 times of its living area. lot size in square feet = 20000, living area = 4246.
Middle School: Los Cerros Middle School (9/10). High School: Monte Vista High School (10/10).
The property features two fully independent homes on one lot, providing rare versatility for multi-generational living, guest housing, or a high-end private retreat.
Living area discrepancy between mls listing and other public or private record. mls listing living area = 4246, other record living area = 3151. Bedroom count discrepancy between mls listing and other public or private record. mls listing bedroom count = 6, other record bedroom count = 4.
With a list price exceeding $4.1 million, the property sits at a premium luxury tier that may limit the pool of qualified buyers in the current market.
Accommodating two separate residences on a half-acre lot may result in less expansive open yard space compared to other single-residence luxury estates in the Diablo area.
Tucked at the end of a private cul-de-sac in Diablo, this exceptionally remodeled estate offers a rare opportunity to own TWO FULLY INDEPENDENT RESIDENCES on apx. 1/2 acre of park-like grounds.Thoughtfully designed the property features a refined single story main residence, showcasing vaulted ceilings, European white oak floors and a seamless indoor-outdoor flow. Custom detailing and amenities, including smart home technology provide comfort and convenience throughout! Expansive living spaces open to an elevated entertaining deck overlooking the resort-style pool and lush landscaping. The fully independent guest residence lives like a true second home - complete with its own private yard, an upstairs primary suite and an additional bedroom and bath on the main level. Ideal for multi-generational living, extended guests, or private work-from-home retreat. With versatility rarely found in today's market. The grounds are a stand out feature - an artful composition of mature landscaping, curated garden rooms and intimate outdoor spaces for both relation and entertaining. Every element has been created to enhance the experience of indoor-outdoor living. This is more than a home, it is a private dual residence estate offering a lifestyle of comfort, flexibility. and timeless appeal.
No exterior & parking available.
Grades K-5 • 1.5 mi
Grades 6-8 • 1.6 mi
Grades 9-12 • 1.8 mi
No sensitive facilities data found.
| Feature | Subject | Average Home | Neighborhood Ranking (50 Listings) |
|---|---|---|---|
| Beds | 6.0 | 5.5 | 50% |
| Baths | 6.0 | 5.5 | 50% |
| Square foot | 4,246 | 5,150.5 | 38% |
| Lot Size | 20,000 | 26,876.5 | 25% |
| Price | $3.98M | $4.22M | 50% |
| Price per sq ft | $939 | $912 | 63% |
| Built year | 1972 | 1981 | 50% |
| HOA | $0 | $0 | 50% |
| Days on market | 56 | 116 | 13% |
Apr 16, 2026
$3,985,000
$4,122,000
-3% Price Drop
Initial Listing
Feb 25, 2026
$4,122,000
Initial Listing
Jun 9, 2005
$1,492,500
Public Record
May 27, 1999
$540,000
Public Record
Mar 18, 1994
$409,000
Public Record