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22 Calle Del CasarilloDiablo, CA 94528

For Sale

$3,985,000

Smart Buyer Rebate $39,850

Tucked at the end of a private cul-de-sac in Diablo, this exceptionally remodeled estate offers a rare opportunity to own TWO FULLY INDEPENDENT RESIDENCES on apx. 1/2 acre of park-like grounds.Thoughtfully designed the property features a refined single story main residence, showcasing vaulted ceilings, European white oak floors and a seamless indoor-outdoor flow. Custom detailing and amenities, including smart home technology provide comfort and convenience throughout! Expansive living spaces open to an elevated entertaining deck overlooking the resort-style pool and lush landscaping. The fully independent guest residence lives like a true second home - complete with its own private yard, an upstairs primary suite and an additional bedroom and bath on the main level. Ideal for multi-generational living, extended guests, or private work-from-home retreat. With versatility rarely found in today's market. The grounds are a stand out feature - an artful composition of mature landscaping, curated garden rooms and intimate outdoor spaces for both relation and entertaining. Every element has been created to enhance the experience of indoor-outdoor living. This is more than a home, it is a private dual residence estate offering a lifestyle of comfort, flexibility. and timeless appeal.

Listed by Raelene Sprague

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License #00577360

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Notable Real Estate

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9258192109

Listed by Tonya Colton

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License #01993057

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Notable Real Estate

Last updated May 18, 2026

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Source: CRMLS #41125142

Listing Facts

  • TypeSingle-family
  • NeighborhoodMount Diablo Estate Park
  • Bedrooms6
  • Bathrooms6
  • Days on Prevu157
  • Size4,246 sqft
  • Price per sqft$939

Amenities

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

Location

Mortgage Calculator

Listing History

02/25/2026
Listed by Notable Real Estate
$3,985,000

Property Details for 22 Calle Del Casarillo

Exterior

Construction

  • Roof: Shingle
  • Stories: 1
  • Stories Total: 1
  • Year Built: 1972
  • Architectural Style: Craftsman
  • Builder Name: Custom
  • Construction Materials: Stone, Wood Siding
  • Exterior Features: Garden

Features

  • Other Structures: Guest House
  • Patio And Porch Features: Deck, Patio, Porch
  • Pool Features: Gunite, Gas Heat, In Ground

Measurements

  • Lot Features: Back Yard, Cul-De-Sac, Front Yard, Garden, Sprinklers In Rear, Sprinklers In Front
  • Lot Size Acres: 0.45
  • Lot Size Area: 20,000
  • Lot Size Source: Appraiser
  • Lot Size Square Feet: 20,000
  • Lot Size Units: Square Feet

Financial

Taxes

  • Parcel Number: 1952800355

Interior

Features

  • Appliances: Dryer, Washer
  • Fireplace Features: Family Room, Living Room
  • Fireplace: Yes
  • Flooring: Stone, Tile, Wood
  • Interior Features: Breakfast Bar

Measurements

  • Living Area: 4,246

Rooms

  • Bathrooms Full: 6
  • Bathrooms Total Integer: 6
  • Bedrooms Total: 6

Other

Location

  • Subdivision Name: DIABLO

Parking

Parking

  • Attached Garage: Yes
  • Garage Spaces: 2
  • Garage: Yes
  • Parking Features: Attached, Garage, Garage Door Opener
  • Parking Total: 1

Schools

High School

  • High School District: San Ramon Valley

Utilities

Equipment

  • Cooling: Central Air, Whole House Fan
  • Has Cooling: Yes
  • Heating: Forced Air, Natural Gas
  • Has Heating: Yes

Frequently Asked Questions

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

There are 6 bedrooms and 6 bathrooms in this single-family home at 22 Calle Del Casarillo.

Does this single-family home have parking?

Yes, there are 2 parking spaces available for 22 Calle Del Casarillo.

How does 22 Calle Del Casarillo compare to other single-family homes in Mount Diablo Estate Park?

This single-family home is listed 49% below the average price for single-family homes in Mount Diablo Estate Park and has been on the market for 76 more 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 4,246 sqft.

22 Calle Del Casarillo is a 6-bedroom, 6-bath single-family home for sale in Diablo CA 94528. Listed on Prevu for 157 days at $3,985,000. This property features 4,246 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. Property amenities include private outdoor space, air conditioning, parking, swimming pool, and washer/dryer. Browse more single-family home listings in Contra Costa County.

Based on information from California Regional Multiple Listing Service, Inc. 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.