1720 Alameda Diablo

• Sun Sep 20, 1:30 pm - 4:00 pm

  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.

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.

Current Status

New

Original Price

$6,995,000

List Price

$6,995,000

On Market Date

Sep 16, 2026

Property Type

Detached

D/N/S

Diablo C.C.

Zip Code

94528

MLS ID

41148397

APN

1951520038

Year Built

1941

Stories in Building

1

Possession

Close Of Escrow

Data Source

MAXEBRDI

Origin MLS System

CONTRA COSTA

Bed

7

Bath

7.5 (6/3)

Parking

4

Attached, Garage Door Opener

SQ FT

8,190

SQ FT Source

Public Records

Lot SQ FT

62,901.0

Lot Acres

1.44 Acres

Pool Info

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

Kitchen

Dishwasher, Double Oven, Gas Range, Microwave, Oven, Range, Refrigerator, Self Cleaning Oven, Gas Water Heater, Breakfast Bar, Breakfast Nook, Stone Counters, Eat-in Kitchen, Gas Range/Cooktop, Kitchen Island, Oven Built-in, Pantry, Range/Oven Built-in, Self-Cleaning Oven, Updated Kitchen, Other

Cooling

Central Air, Whole House Fan

Disclosures

Nat Hazard Disclosure, None

Entry Level

Exterior Details

Back Yard, Front Yard, Garden/Play, Sprinklers Automatic, Storage, Landscape Back, Landscape Front

Flooring

Hardwood, Tile, Carpet

Foundation

Fire Place

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

Heating

Zoned, Natural Gas

Laundry

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

Upper Level

1 Bedroom, 1 Bath

Main Level

6+ Bedrooms, 5+ Baths, Primary Bedrm Suite - 1, Primary Bedrm Suites - 2, No Steps to Entry, Main Entry

Possession

Close Of Escrow

Architectural Style

Traditional

Non-Master Bathroom Includes

Shower Over Tub, Solid Surface, Stall Shower, Tile, Other, Closet, Walk-In Closet(s), Window

Construction Status

Existing

Additional Miscellaneous Features

Back Yard, Front Yard, Garden/Play, Sprinklers Automatic, Storage, Landscape Back, Landscape Front

Location

Level, Premium Lot

Roof

Composition Shingles

Water and Sewer

Public

Fee

Unavailable

MLS and other Information regarding properties for sale as shown in Theo have been obtained from various sources such as sellers, public records, agents and other third parties. This information may relate to the condition of the property, permitted or unpermitted uses, zoning, square footage, lot size/acreage or other matters affecting value or desirability. Unless otherwise indicated in writing, neither brokers, agents nor Theo have verified, or will verify, such information. If any such information is important to buyer in determining whether to buy, the price to pay or intended use of the property, buyer is urged to conduct their own investigation with qualified professionals, satisfy themselves with respect to that information, and to rely solely on the results of that investigation.

School data provided by GreatSchools. School service boundaries are intended to be used as reference only. To verify enrollment eligibility for a property, contact the school directly.