In the storied enclave of Diablo, where privacy and prestige quietly define the landscape, this masterfully crafted estate presents a rare opportunity to own a home of substance and serenity. Classic Craftsman architecture gives way to soaring interiors filled with natural light and framed garden vistas. Rich wood floors run throughout, grounding the home in warmth and refinement. Dual fireplaces anchor the living and family rooms, while expansive decks blur the line between indoors and out. At the center, a statement kitchen pairs sculptural quartzite with professional-grade Miele appliances — equally suited for intimate dinners or elegant entertaining. The primary suite is designed as a private retreat: heated floors, a spa-caliber wet room bath, and an expansive custom wardrobe evoke the feeling of a five-star resort. A secondary ensuite, two additional bedrooms, and a dedicated pool bath ensure both flexibility and thoughtful design. Outdoors, the estate unfolds into a resort-like sanctuary — sparkling pool, tranquil fountain, firelit evenings beneath the stars, and layered gardens offering both beauty and seclusion. Completing the property is a rare two-story guest residence with its own kitchen, laundry, fireplace, and private yard — ideal for extended family, executive qua
Listed by Raelene Sprague
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License #00577360
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Notable Real Estate
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925-819-2109
Listed by Tonya Colton
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License #01993057
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Notable Real Estate
Last updated March 11, 2026
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Source: bridgeMLS #41125142
Listing Facts
TypeSingle-family
NeighborhoodMount Diablo Estate Park
Bedrooms6
Bathrooms6
Days on Prevu20
Size4,246 sqft
Price per sqft$971
Amenities
Dishwasher
Private Outdoor Space
Washer/Dryer
Air Conditioning
Parking
Swimming Pool
Location
Mortgage Calculator
Listing History
02/25/2026
Listed by Notable Real Estate
$4,122,000
Property Details for 22 Calle Del Casarillo
Exterior
Construction
Roof: Shingle
Stories: 1
Window Features: Skylight(s)
Year Built: 1972
Architectural Style: Craftsman
Builder Name: Custom
Construction Materials: Wood Shingles, Wood Siding
Exterior Features: Back Yard, Dog Run, Front Yard, Garden/Play, Side Yard, Sprinklers Automatic, Sprinklers Front, Sprinklers Side, Storage, Garden, Landscape Back, Landscape Front, Yard Space
Features
Fencing: Fenced, Full
Patio And Porch Features: Deck, Patio, Porch, Porch Steps
Pool Features: Gas Heat, Gunite, In Ground, Pool Sweep, See Remarks, Outdoor Pool
Pool Private: Yes
Measurements
Building Area Total: 4,246
Lot Features: 2 Houses / 1 Lot, Cul-De-Sac, Dead End, Sprinklers In Rear, Landscaped
How many bedrooms and bathrooms does this single-family home have?
There are 6 bedrooms and 6 bathrooms in this single-family home at 22 Calle Del Casarillo.
Does this single-family home have parking?
Yes, there are 2 parking spaces available for 22 Calle Del Casarillo.
How does 22 Calle Del Casarillo compare to other single-family homes in Mount Diablo Estate Park?
This single-family home is listed 0% above the average price for single-family homes in Mount Diablo Estate Park and has been on the market for 21 less days than the typical home in this area.
What is the square footage on this single-family home?
According to the MLS, this listing is 4,246 sqft.
22 Calle Del Casarillo is a 6-bedroom, 6-bath single-family home for sale in Diablo CA 94528. Listed on Prevu for 20 days at $4,122,000. This home features 4,246 square feet of living space, located in Contra Costa County. The median listing price for single-family homes in this area is $3,919,000. Property amenities include private outdoor space, dishwasher, air conditioning, parking, swimming pool, and washer/dryer. Explore more single-family home listings in Contra Costa County.
Based on information from bridgeMLS and/or other sources. All data, including all measurements and calculations of area, is obtained from various sources and has not been, and will not be, verified by Prevu or the MLS. Information is provided exclusively for consumer's personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumer may be interested in purchasing.
Rebate estimate is indicative only and based on listing price and estimated buyer's agent commission paid by owner, if applicable. Final rebates are subject to Terms of Use and may vary due to final negotiated transaction terms.