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7 Beds
9 Baths
8,190 sqft

$6,995,000

1720 Alameda Diablo, Diablo CA, 94528

Price per sqft$854.09
Built in1941
Property size8,190 sqft
Property typeResidential
Listed by Margaret Combs CA DRE# 01361329 with The Agency 925-876-6935

Overview

Active

Listed Sep 16, 2026

Updated 10h ago

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.

$46,538/mo

Est. mortgage payment based on a $6,995,000 home price.

All estimates are provided by Luxury Presence for informational purposes only. Actual amounts may vary.

Additional information

MLS® ID
41148397

Interior Features

Bedrooms
7
Bathrooms
9
Fireplace
Yes
Cooling
Yes
Heating
Yes
Basement
No

Exterior Features

Lot Size
1.44 Acres

Other Property Details

Garage
Yes

Also listed on BEAR

MLS provider logo

Listed by Margaret Combs CA DRE# 01361329 with The Agency 925-876-6935

Based on information from the California Regional Multiple Listing Service (CRMLS) as of 9/25/2026. This information is for your personal, non-commercial use and may not be used for any purpose other than to identify prospective properties you may be interested in purchasing. Display of MLS data is usually deemed reliable but is NOT guaranteed accurate by the MLS. Buyers are responsible for verifying the accuracy of all information and should investigate the data themselves or retain appropriate professionals. Information from sources other than the Listing Agent may have been included in the MLS data. Unless otherwise specified in writing, the Broker/Agent has not and will not verify any information obtained from other sources. The Broker/Agent providing the information contained herein may or may not have been the Listing and/or Selling Agent. Property locations as displayed on any map are best approximations only and exact locations should be independently verified. Any offer of compensation is made only to participants of the MLS where the listing is filed.

©2026 California Regional Multiple Listing Service (CRMLS) all rights reserved.

Data last updated on 9/25/2026 at 3:51 AM UTC Last Checked: 3:51 AM UTC

 

 

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