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$6,995,000 Just Listed

  • For Sale
  • Active
  • Single Family
  • 7 Beds
  • 6 Full Baths
  • 3 Partial Baths
  • 4 Car Garage
  • Updated 1 day ago

Next open house:

Open House: 1:30 PM - 4:00 PM

Saturday 9/19 1:30 PM - 4:00 PM

1720 Alameda Diablo,Diablo, CA 94528

1720 Alameda DiabloDiabloCA94528

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Join us at 1720 Alameda Diablo on:

  • Open House: 1:30 PM - 4:00 PM

    Sunday 9/20 1:30 PM - 4:00 PM

    1720 Alameda Diablo,Diablo, CA 94528
    1720 Alameda DiabloDiabloCA94528
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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.

Full Property Details for 1720 Alameda Diablo

General

  • Price: $6,995,000
  • Status: Active
  • Type: Single Family
  • Source: MAX
  • MLS ID: 41148397
  • Updated: 9/17/2026
  • Added to Site: 2 day(s) ago

Interior

  • Number of Rooms: 18
  • Interior Features: Dining Area, Family Room, Formal Dining Room, Office, Storage, Workshop, Breakfast Bar, Breakfast Nook, Pantry, Updated Kitchen, Solar Tube(s)
  • Number of Fireplaces: 3
  • Fireplace(s): Gas, Gas Starter, Living Room, Master Bedroom, Other
  • Appliances: Dishwasher, Double Oven, Gas Range, Microwave, Oven, Range, Refrigerator, Self Cleaning Oven, Gas Water Heater
  • Flooring: Hardwood, Tile, Carpet

Rooms

Bathrooms

  • Total Bathrooms: 9
  • Full Bathrooms: 6
  • Partial Bathrooms: 3
  • Bathroom Features: Shower Over Tub, Solid Surface, Shower Stall, Tile, Other, Closet, Walk-In Closet(s), Window
  • Primary Bathroom: Solid Surface, Stall Shower, Tile, Tub, Updated Baths, Closet, Double Vanity, Walk-In Closet(s), Window

Bedrooms

  • Total Bedrooms: 7

Other Rooms

  • Kitchen: Breakfast Bar, Breakfast Nook, Stone Counters, Dishwasher, Double Oven, Eat-in Kitchen, Gas Range/Cooktop, Kitchen Island, Microwave, Built-In Oven, Pantry, Built-In Range/Oven, Refrigerator, Self-Cleaning Oven, Updated Kitchen, Other
  • Laundry: 220 Volt Outlet, Dryer, Laundry Room, Washer, Inside Room

Additional Information

  • Pool: Yes
  • Pool Description: Gas Heat, In Ground, Solar Heat, Fenced, Pool/Spa Combo, Outdoor Pool

Exterior

  • Exterior Features: Back Yard, Front Yard, Garden/Play, Sprinklers Automatic, Storage, Landscape Back, Landscape Front

Parking

  • Attached garage: Yes
  • Garage Spaces: 4
  • Parking Features: Attached, Garage Door Opener

Location

  • Area: Listing
  • County: Contra Costa
  • Subdivision: Diablo C.C.
  • Driving Directions: Diablo Rd - Alameda Diablo

Heating & Cooling

  • Central air: Yes
  • Cooling Type: Central Air, Whole House Fan
  • Heating Type: Zoned, Natural Gas

Utilities

  • Sewer: Public Sewer
  • Water: Public

Structural Information

  • Architectural Style: Traditional
  • Exterior Const.: Wood Siding
  • Roof: Composition Shingles
  • Windows: Skylight(s)
  • Stories/Levels: One Story
  • Year Built: 1941

Lot Features

  • Lot Size (Acres): 1.44
  • Lot Dimensions: 1.444
  • Lot Features: Level, Premium Lot
  • Fencing (Description): Fenced

Financial Considerations

  • Price Per Sq. Ft.: $854

Disclosures and Reports

  • Property ID: 1951520038

Listed by The Agency, Margaret Combs

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Listing agent

— 1720 Alameda Diablo —

  • Margaret Combs

    The Agency

Get Pre-Approved Today

Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

Get Pre-Approved

Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

Get Pre-Approved

Schools serving 1720 Alameda Diablo

School District:San Ramon Valley Unified School District
NameGradesDistance
Green Valley Elementary School, Danville, CA
1001 Diablo Road, Danville, CA 94526
K-50.9 mi
Los Cerros Middle School
968 Blemer Road, Danville, CA 94526
6-81 mi
Monte Vista High School
3131 Stone Valley Road, Danville, CA 94526
9-121.1 mi
Disclaimer: School attendance boundaries provided by ATTOM Data Solutions and are for reference only. Contact the school directly to verify enrollment eligibility.

Price & Sales History for 1720 Alameda Diablo Get Price Alerts and Save Property

Date
Details
Price
Change
Source
9/16/2026
Listed
$6,995,000
52.07%
MLS
10/07/2020
Sold
$4,600,000
—
Public Record
Get Price Alerts and Save Property
Disclaimer: Historical sales information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

Tax History for 1720 Alameda Diablo

Year
Property Taxes
Change
Tax Assessment
Change
2025
$55,694
—
$5,078,768
2%
2025
$55,694
2%
$4,979,186
2%
2024
$54,575
2%
$4,881,556
2%
2023
$53,761
1%
$4,785,840
2%
2022
$53,348
2%
$4,692,000
2%
2021
$52,232
-14%
$4,600,000
-14%
2020
$60,886
5%
$5,365,500
6%
2019
$57,830
6%
$5,051,000
4%
2018
$54,749
2%
$4,867,000
—
2017
$53,500
—
$4,844,000
1%
2016
$53,284
1%
$4,779,000
2%
2015
$52,625
2%
$4,700,000
2%
2014
$51,804
11%
$4,589,000
11%
2013
$46,697
—
$4,127,000
—
View All
Disclaimer: Historical tax information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

Estimate the Cost for 1720 Alameda Diablo

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*These costs are estimates, and the interest rates assume exceptional credit standing.

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with our affiliated lender
NMLS#: 1598647

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Listed by The Agency, Margaret Combs

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1720 Alameda Diablo, Diablo, CA 94528 (MLS# 41148397) is a Single Family property with 7 bedrooms, 6 full bathrooms and 3 partial bathrooms. 1720 Alameda Diablo is currently listed for $6,995,000 and was received on September 16, 2026. Want to learn more about 1720 Alameda Diablo? Do you have questions about finding other Single Family real estate for sale in Diablo? You can browse all Diablo real estate or contact a Coldwell Banker agent to request more information.

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