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1924 Alameda DiabloDiablo, CA 94528

For Sale

$9,750,000

Smart Buyer Rebate $97,500

Welcome to Hacienda de las Palmas… Behind double gates with access from both Alameda Diablo and La Cadena, this exceptional Spanish-style Hacienda blends timeless character with modern sophistication. Originally built in 1949 and thoughtfully renovated, the estate honors its rich architectural heritage while offering every comfort for today's lifestyle. Set on 1.53 gated acres spanning two parcels, the property encompasses approximately 6,992 square feet across the main residence, an impressive poolside casita, and finished barn. A rare opportunity awaits on the included .77-acre unimproved homesite, offering endless building possibilities or equestrian use. Inside, an original vaulted wood-beam living room ceiling, handcrafted details, and sun-filled living spaces create a warm and inviting atmosphere. The predominantly single-level floor plan features six bedrooms, six bathrooms, and two half baths. Designed for both everyday living and gracious entertaining, the chef’s kitchen is appointed with premium appliances, quartz countertops, and a spacious butler’s pantry. A dedicated wine room, beautifully updated bathrooms, and thoughtfully curated finishes throughout reflect the home's commitment to quality and authenticity. The luxurious primary suite with adjoining coffee nook serves as a private sanctuary. The home's only second-floor space is a secluded office retreat, including a full bathroom, and balcony overlooking the estate grounds and surrounding hills. Step outside and the grounds become the showpiece. Towering palm trees, Spanish ceramic tiled patios, and a level, expansive lawn create a magical backdrop, framed by mature privacy hedging and lush plantings throughout. A sparkling rectangular pool built in 2021 anchors the outdoor entertaining areas, complemented by a sprawling 1585 sf poolside casita with family room, changing/exercise room, two bathrooms, and bedroom. A remodeled entertaining barn and a golf cart garage add even more flexibility for hosting and hobbies, while the rolling hills beyond provide a constant, picturesque backdrop. Perfectly positioned along prestigious Alameda Diablo, and a short stroll to Diablo Country Club, this extraordinary estate offers a rare combination of history, privacy, flexibility, and luxury in one of the East Bay’s most coveted settings.

Listed by Mary Bonham

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License #01203856

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The Agency

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925-997-1787

Listed by Erin Carrigg

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License #02020465

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The Agency

Last updated July 28, 2026

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Source: bridgeMLS #41139490

Listing Facts

  • TypeSingle-family
  • NeighborhoodMount Diablo Estate Park
  • Bedrooms6
  • Bathrooms8
  • Days on Prevu38
  • Size6,992 sqft
  • Price per sqft$1,394

Amenities

  • Dishwasher
  • Private Outdoor Space
  • Washer/Dryer
  • Air Conditioning
  • Parking
  • Swimming Pool

Location

Mortgage Calculator

Listing History

06/24/2026
Listed by The Agency
$9,750,000

Property Details for 1924 Alameda Diablo

Exterior

Construction

  • Stories: 1
  • Year Built: 1950
  • Architectural Style: Spanish
  • Construction Materials: Stucco
  • Exterior Features: Back Yard, Garden/Play, Private Entrance

Features

  • Fencing: Fenced
  • Patio And Porch Features: Patio
  • Pool Features: Gas Heat, In Ground, Pool Cover
  • Pool Private: Yes

Measurements

  • Building Area Total: 6,992
  • Lot Features: Close To Clubhouse, Horses Possible, Level, Back Yard, Front Yard, Landscaped, Private, Security Gate
  • Lot Size Acres: 1.53
  • Lot Size Area: 1
  • Lot Size Square Feet: 66,647
  • Lot Size Units: Acres

Financial

Taxes

  • Parcel Number: 1952600029

Interior

Features

  • Appliances: Dishwasher, Double Oven, Gas Range, Microwave, Refrigerator, Tankless Water Heater
  • Fireplace Features: Family Room, Living Room
  • Fireplace: Yes
  • Fireplaces Total: 2
  • Flooring: Hardwood, Carpet
  • Interior Features: Formal Dining Room, Office, Breakfast Nook, Updated Kitchen

Measurements

  • Living Area: 6,992
  • Living Area Units: Square Feet

Rooms

  • Bathrooms Full: 6
  • Bathrooms Partial: 2
  • Bathrooms Total Integer: 8
  • Bedrooms Total: 6
  • Rooms Total: 13

Other

Location

  • Subdivision Name: DIABLO C.C.

Parking

Parking

  • Covered Spaces: 2
  • Garage Spaces: 2
  • Parking Features: Attached, Int Access From Garage, Golf Cart Garage, Electric Vehicle Charging Station(s), Garage Door Opener

Schools

High School

  • High School District: San Ramon Valley (925) 552-5500

Utilities

Equipment

  • Cooling: Central Air
  • Electric: No Solar
  • Heating: Zoned
  • Has Heating: Yes
  • Laundry Features: 220 Volt Outlet, Dryer, Laundry Room, Washer, Cabinets, Sink
  • Sewer: Public Sewer
  • Water Source: Public

Frequently Asked Questions

How many bedrooms and bathrooms does this single-family home have?

There are 6 bedrooms and 8 bathrooms in this single-family home at 1924 Alameda Diablo.

Does this single-family home have parking?

Yes, there are 2 parking spaces available for 1924 Alameda Diablo.

How does 1924 Alameda Diablo compare to other single-family homes in Mount Diablo Estate Park?

This single-family home is listed 25% above the average price for single-family homes in Mount Diablo Estate Park and has been on the market for 43 less days than the typical home in this area.

What is the square footage on this single-family home?

According to the MLS, this listing is 6,992 sqft.

1924 Alameda Diablo is a 6-bedroom, 8-bath single-family home for sale in Diablo CA 94528. Available on Prevu for 38 days at $9,750,000. This property features 6,992 square feet of living space, located in Mount Diablo Estate Park. The median listing price for single-family homes in this area is $5,850,000. Additional amenities include private outdoor space, dishwasher, air conditioning, parking, swimming pool, and washer/dryer. Explore more single-family home listings in Contra Costa County.

Based on information from bridgeMLS 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 Prevu or the MLS. Information is provided exclusively for consumer's personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumer may be interested in purchasing.

Full MLS Disclaimers

Rebate estimate is indicative only and based on listing price and estimated buyer's agent commission paid by owner, if applicable. Final rebates are subject to Terms of Use and may vary due to final negotiated transaction terms.