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Listed by Margaret Combs • The Agency • 925-575-8000

$ 6,995,000

Est. payment -/mo

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1720 Alameda Diablo Diablo, CA 94528

7 Beds

9 Baths

8,190 SqFt

UPDATED:

Key Details

Property Type Single Family Home

Sub Type Detached

Listing Status Active

Purchase Type For Sale

Square Footage 8,190 sqft

Price per Sqft $854

Subdivision Diablo C.C.

MLS Listing ID 41148397

Bedrooms 7

Full Baths 6

HOA Y/N No

Year Built 1941

Lot Size 1.444 Acres

Property Sub-Type Detached

Source CONTRA COSTA

Property Description

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.

Location

State CA

County Contra Costa

Interior

Heating Zoned, Natural Gas

Cooling Central Air, Whole House Fan

Flooring Hardwood, Tile, Carpet

Fireplaces Number 3

Fireplaces Type Gas, Gas Starter, Living Room, Master Bedroom, Other

Fireplace Yes

Window Features Skylight(s)

Appliance Dishwasher, Double Oven, Gas Range, Microwave, Oven, Range, Refrigerator, Self Cleaning Oven, Gas Water Heater

Laundry 220 Volt Outlet, Dryer, Laundry Room, Washer, Inside Room

Exterior

Garage Spaces 4.0

Pool Gas Heat, In Ground, Solar Heat, Fenced, Pool/Spa Combo, Outdoor Pool

Handicap Access None

Private Pool true

Building

Lot Description Level, Premium Lot

Story 1

Water Public

Architectural Style Traditional

Others

Special Listing Condition Standard

© 2026 BEAR, CCAR, bridgeMLS. This information is deemed reliable but not verified or guaranteed. This information is being provided by the Bay East MLS or Contra Costa MLS or bridgeMLS. The listings presented here may or may not be listed by the Broker/Agent operating this website.

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1720 Alameda Diablo Diablo, CA 94528

Key Details

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1720 Alameda Diablo