THE WHITE CASTLE | A RARE DIABLO LEGACY ESTATE An exceptional offering rarely seen in Diablo. Positioned on one of the community’s most coveted streets near the prestigious Diablo Country Club entrance, “The White Castle” occupies 1.44 acres of nearly flat, park-like grounds wrapped in privacy and timeless grandeur. This extraordinary 8,190 SF estate has been thoughtfully reimagined by Jacobs & Co. and Badger Construction, blending architectural scale with highly curated design and modern livability. The predominantly single-level floor plan unfolds across two private wings, offering seven bedrooms—including five en-suites—and an exceptional environment for sophisticated entertaining and multigenerational living. Highlights include a dramatic expanded entry, expansive great room, formal dining, elegant bar lounge, curated wine room, prep kitchen, redesigned mud room, tech center and two laundry rooms. The primary suite has been elevated with a newly designed bath and expanded closets. Beyond the interiors, the estate delivers a true private resort experience with a pool, spa, outdoor fireplace seating, manicured grounds, new sod, substantial storage structures and a charming children’s playhouse. A four-car garage caters beautifully to automotive enthusiasts. Owned solar serves both the home and pool, complemented by a whole-house generator.
Property Details
Price:
$6,995,000
MLS #:
41148397
Status:
Pending
Beds:
7
Baths:
7.5
Type:
Single Family
Subtype:
Single Family Residence
Subdivision:
DIABLO C.C.
Listed Date:
Sep 16, 2026
Finished Sq Ft:
8,190
Lot Size:
62,901 sqft / 1.44 acres (approx)
Year Built:
1941
See this Listing
Schools
Interior
Appliances
Gas Water Heater
Bathrooms
6 Full Bathrooms, 3 Half Bathrooms
Cooling
Whole House Fan, Central Air
Flooring
Tile, Carpet, Wood
Heating
Natural Gas, Forced Air
Levels
One
Exterior
Accessibility Features
None
Architectural Style
Traditional
Attached Garage YN
1
Construction Materials
Wood Siding
Covered Spaces
4
Garage Spaces
4
Lot Features
Level with Street, Sprinklers Timer, Front Yard, Garden, Back Yard
Other Structures
Storage
Parking Features
Garage, Garage Door Opener
Parking Spots
4
Parking Total
4
Patio And Porch Features
Patio
Roof
Shingle
Financial
Map
Community
- Address1720 Alameda Diablo Diablo CA
- SubdivisionDIABLO C.C.
- CityDiablo
- CountyContra Costa
- Zip Code94528
Market Summary
Current real estate data for Single Family in Diablo as of Oct 20, 2026
7
Single Family Listed
40
Avg DOM
1,055
Avg $ / SqFt
$5,644,484
Avg List Price
Property Summary
- Located in the DIABLO C.C. subdivision, 1720 Alameda Diablo Diablo CA is a Single Family for sale in Diablo, CA, 94528. It is listed for $6,995,000 and features 7 beds, 8 baths, and has approximately 8,190 square feet of living space, and was originally constructed in 1941. The current price per square foot is $854. The average price per square foot for Single Family listings in Diablo is $1,055. The average listing price for Single Family in Diablo is $5,644,484.
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