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Sold

1720 Alameda Diablo

1720 Alameda Diablo, Diablo, CA 94528

$7,000,000
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.

7
beds

9
baths

8,190 Sq.Ft. LIVING AREA

1.44 Acres lot

Mary Bonham

Mary Bonham

Features & Amenities

Interior

  • total bedrooms7
  • Total bathrooms9
  • full bathrooms6
  • Laundry room 220 Volt Outlet, Dryer, Laundry Room, Washer, Inside Room
  • Flooring Hardwood, Tile, Carpet
  • Fireplace Gas, Gas Starter, Living Room, Master Bedroom, Other
  • APPLIANCES Dishwasher, Double Oven, Gas Range, Microwave, Oven, Range, Refrigerator, Self Cleaning Oven, Gas Water Heater
  • other interior Features Dining Area, Family Room, Formal Dining Room, Office, Storage, Workshop, Breakfast Bar, Breakfast Nook, Pantry, Updated Kitchen, Solar Tube(s)

Area & Lot

  • Status Sold
  • Date Sold October 30, 2026
  • Living Area8,190 Sq.Ft.
  • Total Area8,190 Sq.Ft.
  • Lot Area1.44 Acres
  • MLS® ID41148397
  • TypeResidential
  • YEAR BUILT1941
  • NeighborhoodDiablo
  • Architecture StylesTraditional

Exterior

  • STORIES1
  • Garage Space4.0
  • water SourcePublic
  • PoolGas Heat, In Ground, Solar Heat, Fenced, Pool/Spa Combo, Outdoor Pool
  • roofShingle
  • lot featuresLevel, Premium Lot
  • parkingAttached, Garage Door Opener
  • HEAT TYPEZoned, Natural Gas
  • AIR CONDITIONINGCentral Air, Whole House Fan
  • sewerPublic Sewer
  • Disability FeaturesNone
  • security FeaturesSecurity Alarm - Owned, Double Strapped Water Heater, Security Gate, Security System Owned, Prewired, Smoke Detector(s), Closed Circuit Camera(s)
  • Green featuresSolar
  • other exterior FeaturesBack Yard, Front Yard, Garden/Play, Sprinklers Automatic, Storage, Landscape Back, Landscape Front

Financial

  • Sales Price$7,000,000
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Diablo

Known for its exclusive and private residential estates and home to Diablo Country Club, an esteemed private club nestled within the picturesque hills of Danville, California

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The Mary Bonham Real Estate Team bring years of experience and proven results in residential real estate sales and marketing. We focus on our client’s success. We are results-driven. We believe in personal attention and every detail matters. We operate with integrity, honesty, and have fun along the way.

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