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1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
1720 Alameda Diablo
VIEW PHOTOS
$6,995,000

1720 Alameda Diablo

7 Beds 9 Baths 8,190 Sq.Ft. 1.44 Acres

Open House

9/19/2026 1:30PM - 4:00PM PDT
9/20/2026 1:30PM - 4:00PM PDT

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.

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Location

1720 Alameda Diablo, Diablo, CA 94528

Status

For Sale
Margaret Combs

Margaret Combs

TITLE

Founding Member & Real Estate Agent

LICENSE

01361329

Property Amenities

Interior
Laundry room 220 Volt Outlet, Dryer, Laundry Room, Washer, Inside Room
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
Flooring Hardwood, Tile, Carpet
Total Bedrooms: 7
Full Bathrooms: 6
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
Open house

9/19/2026 1:30PM - 4:00PM PDT

9/20/2026 1:30PM - 4:00PM PDT

Lot Area 1.44 Acres
Living area 8,190 Sq.Ft.
MLS® ID 41148397
Year Built 1941
Architecture Styles Traditional
Type Residential
Status For Sale
Exterior
Stories 1
Pool Gas Heat, In Ground, Solar Heat, Fenced, Pool/Spa Combo, Outdoor Pool
Air conditioning Central Air, Whole House Fan
Heat type Zoned, Natural Gas
Green Feature Solar
Disability Features None
Water Source Public
Garage Space 4.0
Sewer Public Sewer
Other Exterior Features Back Yard, Front Yard, Garden/Play, Sprinklers Automatic, Storage, Landscape Back, Landscape Front
Parking Attached, Garage Door Opener
Lot Features Level, Premium Lot
Roof Composition Shingles
Finance
Sales Price $6,995,000
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Schedule a Showing

I would love to show you this beautiful property. Please select your preferred date and time below. I will be in touch shortly to confirm your appointment.

Thank you for your interest in 1720 Alameda Diablo, Diablo, CA 94528. We are reviewing your request and will be in touch shortly!

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Work With Margaret

Margaret is committed to listening to her client’s wishes and meeting their goals and expectations as quickly as possible. Known for her friendly demeanor and excellent communication, she strives to keep all parties informed through every step of the real estate process.