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Listed by: Margaret Combs (925) 876-6935 DRE #01361329 | The Agency (925) 575-8000
$6,995,000
Monthly Est:$34,817
7 Beds
- 9 Baths
6 full baths + 3 half baths
8,190sqft
1720 Alameda Diablo, Diablo, CA 94528
$6,995,000
$34,817/moEst:
Get Pre-Approved
Single Family Residence
Built in 1941
$-- HOA
1.44 acres lot
$854/sq.ft
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.
- Houzeo last checked: 8 minutes ago
- Listing updated: September 28, 2026 at 7:59 pm
- Source: California Regional MLS-CA | MLS#: 41148397

Property Details
Status
Pending
Type
Single Family Residence
No. of Stories
1
County
City
Neighborhood
--
Year Built
1941
HOA Fees
-
Finished Area
8,190 sqft
Lot Size
1.44 acres lot
Basement Area
- sqft
MLS Name
California Regional MLS
MLS Number
41148397
MLS Status
Pending
Days on Market
22
Cumulative Days on Market
10

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Location
Facts & Features
Rooms
Bedrooms & bathrooms
Bedrooms: 7
Bathrooms: 9
Interior
Interior Features
Breakfast Bar, Breakfast Area, Eat In Kitchen, Workshop
Heating
Forced Air, Natural Gas
Flooring
Carpet, Tile, Wood
Appliances
Gas Water Heater
Cooling
Central Air, Whole House Fan
Construction
Year Built
Year Built: 1941
Home type
Single Family Residence
Architectural Style
Traditional
Roof
Shingle
Construction Materials
Wood Siding
Utilities & Energy
Fireplace Features
Gas, Gas Starter, Living Room, Primary Bedroom
Parking Features
Garage, Garage Door Opener
Pool Features
Gas Heat, In Ground, Solar Heat
Other Features
Lot Features
Back Yard, Front Yard, Garden, Sprinklers Timer, Street Level
Subdivision Name
Diablo C.c.
Patio And Porch Features
Patio
Price History
| Date | Event | Price |
|---|---|---|
09/27/2026 Source: | Pending | $6,995,000 $854/sqft |
09/15/2026 Source: | Price Increased | $6,995,000 +19.57% $854/sqft |
02/03/2026 Source: | Off Market | $5,850,000 $714/sqft |
02/03/2026 Source: | Listed for Sale | $5,850,000 +27.17% $714/sqft |
10/13/2020 Source: | Sold | $4,600,000 $562/sqft |
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Based on information from California Regional Multiple Listing Service, Inc. as of Oct 08, 2026, 08:45PM and /or other sources. All data, including all measurements and calculations of area, is obtained from various sources and has not been, and will not be, verified by broker or MLS. All information should be independently reviewed and verified for accuracy. Properties may or may not be listed by the office/agent presenting the information. Information being provided is for consumers’ personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. This website may not include listings or property addresses of sellers who have directed their listing brokers to withhold their listing or their property address from display on the Internet. © 2026 California Regional Multiple Listing Service. All Rights Reserved.
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