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Sale Pending at 1720 Alameda Diablo, Diablo, CA 94528 | MLS# 41148397 | Listing updated on 2026-09-28
Photo 1 of Sale Pending at 1720 Alameda Diablo, Diablo, CA 94528 | MLS# 41148397 | Listing updated on 2026-09-28
Photo 2 of Sale Pending at 1720 Alameda Diablo, Diablo, CA 94528 | MLS# 41148397 | Listing updated on 2026-09-28
Photo 3 of Sale Pending at 1720 Alameda Diablo, Diablo, CA 94528 | MLS# 41148397 | Listing updated on 2026-09-28
Photo 4 of Sale Pending at 1720 Alameda Diablo, Diablo, CA 94528 | MLS# 41148397 | Listing updated on 2026-09-28
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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

  • Beds Icon7 Beds
  • Beds Icon
    9 Baths
  • Beds Icon8,190sqft

1720 Alameda Diablo, Diablo, CA 94528

$34,817/moEst:

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  • 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 California Regional MLS-CA

Property Details

  • Status

    Pending

  • Type

    Single Family Residence

  • No. of Stories

    1

  • County

    Contra Costa County

  • City

    Diablo

  • 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

DateEventPrice

09/27/2026

Source: mls_logoCalifornia Regional MLS-CA #41148397

Pending

$6,995,000

$854/sqft

09/15/2026

Source: mls_logoCalifornia Regional MLS-CA #41148397

Price Increased

$6,995,000 +19.57%

$854/sqft

02/03/2026

Source: mls_logoCalifornia Regional MLS-CA #41121927

Off Market

$5,850,000

$714/sqft

02/03/2026

Source: mls_logoCalifornia Regional MLS-CA #41121927

Listed for Sale

$5,850,000 +27.17%

$714/sqft

10/13/2020

Source: mls_logoCalifornia Regional MLS-CA #40908906

Sold

$4,600,000

$562/sqft

Nearby Homes

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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