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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.
Property Type(s):
Single Family
| Last Updated | 9/16/2026 | Tract | DIABLO C.C. |
|---|---|---|---|
| Year Built | 1941 | Garage Spaces | 4.0 |
| County | Contra Costa |
Additional Details
| AIR | Central Air, Whole House Fan |
|---|---|
| AIR CONDITIONING | Yes |
| APPLIANCES | Gas Water Heater |
| CONSTRUCTION | Wood Siding |
| EXTERIOR | Garden |
| FIREPLACE | Yes |
| GARAGE | Attached Garage, Yes |
| HEAT | Forced Air, Natural Gas |
| INTERIOR | Breakfast Bar, Eat-in Kitchen |
| LOT | 1.444 acre(s) |
| LOT DESCRIPTION | Back Yard, Front Yard, Garden |
| LOT DIMENSIONS | 62901 |
| PARKING | Attached, Garage, Garage Door Opener |
| POOL DESCRIPTION | Gas Heat, In Ground, Solar Heat |
| STORIES | 1 |
| STYLE | Traditional |
| SUBDIVISION | DIABLO C.C. |
Location
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Listed with The Agency
The information being provided by Conejo Simi Moorpark Association of REALTORS® (“CSMAR”) is for the visitor's personal, non-commercial use and may not be used for any purpose other than to identify prospective properties visitor may be interested in purchasing. Any information relating to a property referenced on this web site comes from the Internet Data Exchange (“IDX”) program of CSMAR. This web site may reference real estate listing(s) held by a brokerage firm other than the broker and/or agent who owns this web site. Any information relating to a property, regardless of source, including but not limited to square footages and lot sizes, is deemed reliable but not guaranteed and should be personally verified through personal inspection by and/or with the appropriate professionals. The data contained herein is copyrighted by CSMAR and is protected by all applicable copyright laws. Any dissemination of this information is in violation of copyright laws and is strictly prohibited.
This IDX solution is (c) Diverse Solutions 2026.
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