Mohammad Sajid

1720 Alameda Diablo

Diablo, CA
$ 6,995,000 Beds 7 Baths 7.5 Sq 8,190
Monthly Estimate* How much can I afford?

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.

Active

  • Price
  • $ 6,995,000
  • City
  • Diablo
  • Bedrooms
  • 7
  • Full Bathrooms
  • 6
  • County
  • Contra Costa
  • Half Bathrooms
  • 3
  • Area
  • Lot Size
  • 1.44 Acres
  • Zip
  • 94528
  • Sqr Footage
  • 8,190
  • Year Built
  • 1941
  • Style
  • Traditional
  • MLS#
  • 41148397
Listed By: Margaret Combs with The Agency; 925-876-6935
Data Source: Bay East MLS, CCAR MLS, or bridgeMLS

Features

General

Living Area 8190
Sewer Public Sewer
Heating Zoned,Natural Gas
Cooling Central Air,Whole House Fan
Roof Composition Shingles
Appliances Dishwasher,Double Oven,Gas Range,Microwave,Oven,Range,Refrigerator,Self Cleaning Oven,Gas Water Heater
Garage Spaces 4
Architectural Style Traditional
Pool Features Gas Heat,In Ground,Solar Heat,Fenced,Pool/Spa Combo,Outdoor Pool
Construction Materials Wood Siding
Year Built 1941
Electric Photovoltaics Seller Owned,Generator
Stories Count 1
Levels One Story
Property Subtype Detached
Accessibility None
County Contra Costa
New Construction false
Property Type Residential
HOA false
Subdivision Name Diablo C.C.
Garage Y/N true
Green Energy Generation Solar
Other Structures Shed(s)
Total Rooms 18
Full Baths 6
Status Active
Directions Diablo Rd ~ Alameda Diablo..
City Diablo
MLS Area Listing
Lot Size Square Feet 62901
Property Condition Existing
Standard Status Active

Interior Features

Interior Amenities Dining Area,Family Room,Formal Dining Room,Office,Storage,Workshop,Breakfast Bar,Breakfast Nook,Pantry,Updated Kitchen,Solar Tube(s)
Flooring Hardwood,Tile,Carpet
Total Fireplaces 3
Fireplace Features Gas,Gas Starter,Living Room,Master Bedroom,Other
Air Conditioning Y/N true
Heating Y/N true
Window Features Skylight(s)
Fireplace Y/N true
Laundry Features 220 Volt Outlet,Dryer,Laundry Room,Washer,Inside Room
Total Bedrooms 7
Kitchen Features Breakfast Bar,Breakfast Nook,Stone Counters,Dishwasher,Double Oven,Eat-in Kitchen,Gas Range/Cooktop,Kitchen Island,Microwave,Oven Built-in,Pantry,Range/Oven Built-in,Refrigerator,Self-Cleaning Oven,Updated Kitchen,Other
Total Baths 9
1/2 Baths 3
Power Production Type Photovoltaics

Exterior Features

Exterior Amenities Back Yard,Front Yard,Garden/Play,Sprinklers Automatic,Storage,Landscape Back,Landscape Front
Fencing Fenced
Parking Features Attached,Garage Door Opener
Lot Features Level,Premium Lot
Water Source Public
Lot Size Area 1.444
Building Area Total 8190
Lot Size Acres 1.44
ADU Y/N false

Amenities

  • Foreclosure
  • Views
  • Short Sale
  • New Construction
  • Adult 55+
  • Lease To Own
  • No HOA Fees
  • Furnished
  • Primary On Main
  • Air Conditioning
  • Seller Finance
  • Green
  • Fixer Upper
  • Horse
  • Golf
  • Fireplace
  • Deck
  • Garage
  • Basement
  • Pool

Affordability Calculator

$3,786

Per Month

Based on the average sale price from the Newark, CA office

  • Monthly Principal & interest $2,658
  • Monthly Property Taxes $1,062
  • Monthly Home Insurance $67
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Let's determine your purchasing power. Working with my mortgage partner, you'll have the information you need to shop for a home with confidence.

Default based on a 30-year fixed rate of 6.49% with 20% down. The estimated payment is offered for convenience and is not an offer of credit. Due to market fluctuations, interest rates are subject to change at any time and without notice. Your individual rate may vary. Rates may differ for FHA, VA, or jumbo loans.

Mortgage calculator provided courtesy of Inside Real Estate.

Schools

Elementary School Unknown Elementary School
Middle School
High School Unknown High School

Price History

9/17/2026 Listed $6,995,000

Property vs Zip Code Average in 94528

Price
AVG $6.65M
$7M
Year Built
AVG 1971
1941

In The Neighborhood

Areas That We Cover

1720 Alameda Diablo Diablo, CA is a Single Family Home for sale at $6995000 with 8190 sqft and a lot size of 1.44 Acres Acre(s). 1720 Alameda Diablo Diablo has 7 bedrooms, 6 baths and was built in 1941. The property's zip code is 94528 which is in Diablo, CA

*Information deemed reliable but not guaranteed.

Financial calculator disclaimer: Default based on a 30-year fixed rate of 6.49% with 20% down. The estimated payment is offered for convenience and is not an offer of credit. Due to market fluctuations, interest rates are subject to change at any time and without notice. Your individual rate may vary. Rates may differ for FHA, VA or jumbo loans.

Mortgage calculator provided courtesy of Inside Real Estate.

All information deemed reliable, but not guaranteed, and should be independently verified. The real estate information and related content displayed on this site is provided 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.

Mohammad Sajid

Mohammad Sajid

510-944-1454

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