714-745-2708

1720 Alameda Diablo, Diablo, CA 94528

$6,995,000 Approx. USD 7 beds, 9 baths
8,190 sqft

New Listing Open House 9/27 2:00 PM - 4:00 PM

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Marketed By The Keaty Team

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Marketed By The Keaty Team REALTOR® - Sales Associate 714-608-3298 m
714-745-2708 o
Lic#: 01276603
NRDS ID: 187514104
thekeatyteam@bhhscal.com Tustin Office
18302 Irvine Blvd, Suite 240
Tustin, CA 92780
Phone: 714-832-8800
Fax: 949-565-7700

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Listing Agent

Margaret Combs | margaret.combs@theagencyre.com
Lic#: 01361329
Broker: Courtesy of The Agency
Phone: 925-876-6935

Agent Remarks

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.

Listing Details

Property type: Single Family Residence (Single Family)

Status: Active

MLS# 41148397

Price: $6,995,000

Beds: 7

Baths: 9 (6 full) (3 half)

Gas,Gas Starter,Living Room,Primary Bedroom fireplaces

Built in 1941

8,190 sqft

1 story

1.44 acres

Lot size: 1.4440

Subdivision: DIABLO C.C.

County: Contra Costa

Property style: Traditional

Construction: Wood Siding

Interior features: Breakfast Bar,Breakfast Area,Eat-in Kitchen,Workshop

Appliances: Gas Water Heater

Parking description: Garage,Garage Door Opener

Lot description: Back Yard,Front Yard,Garden,Sprinklers Timer,Street Level

Heating/cooling: Central Air,Whole House Fan

Heating description: Forced Air,Natural Gas

Last Updated: 9/24/2026

Days On Market (DOM): 11

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The style of this listing is Traditional.
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Lat/Long: 37.834319, -121.965178.
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