22 Calle Del Casarillo

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.

Current Status

Active

Original Price

$4,122,000

List Price

$3,985,000

On Market Date

Feb 25, 2026

Property Type

Detached

D/N/S

Diablo

Zip Code

94528

MLS ID

41125142

APN

1952800355

Year Built

1972

Stories in Building

1

Possession

Close Of Escrow, Immediate

Data Source

MAXEBRDI

Origin MLS System

CONTRA COSTA

Bed

6

Bath

6

Parking

2

Detached, Space Per Unit - 2, Garage Door Opener

SQ FT

4,246

SQ FT Source

Appraisal

Lot SQ FT

20,000.0

Lot Acres

0.46 Acres

Pool Info

Gas Heat, Gunite, In Ground, Pool Sweep, See Remarks, Outdoor Pool

Kitchen

Dishwasher, Double Oven, Gas Range, Microwave, Oven, Refrigerator, Dryer, Washer, 220 Volt Outlet, Breakfast Bar, Counter - Solid Surface, Stone Counters, Disposal, Gas Range/Cooktop, Kitchen Island, Oven Built-in, Updated Kitchen

Cooling

Central Air, Whole House Fan

Disclosures

Disclosure Package Avail

Entry Level

Exterior Details

Back Yard, Dog Run, Front Yard, Garden/Play, Side Yard, Sprinklers Automatic, Sprinklers Front, Sprinklers Side, Storage, Garden, Landscape Back, Landscape Front, Yard Space

Flooring

Hardwood, Tile

Foundation

Fire Place

Family Room, Living Room, Other, See Remarks

Heating

Forced Air, Natural Gas

Laundry

Dryer, Gas Dryer Hookup, Laundry Room, Washer, Washer/Dryer Stacked Incl

Upper Level

1 Bedroom, 1 Bath, Primary Bedrm Suite - 1

Main Level

5 Bedrooms, 5+ Baths, Primary Bedrm Suites - 2

Possession

Close Of Escrow, Immediate

Basement

Crawl Space

Architectural Style

Craftsman

Non-Master Bathroom Includes

Shower Over Tub, Tile, Updated Baths, Double Vanity, Window

Construction Status

Existing

Additional Miscellaneous Features

Back Yard, Dog Run, Front Yard, Garden/Play, Side Yard, Sprinklers Automatic, Sprinklers Front, Sprinklers Side, Storage, Garden, Landscape Back, Landscape Front, Yard Space

Location

2 Houses / 1 Lot, Cul-De-Sac, Dead End, Sprinklers In Rear, Landscaped

Roof

Composition Shingles

Water and Sewer

Public

Fee

Unavailable

MLS and other Information regarding properties for sale as shown in Theo have been obtained from various sources such as sellers, public records, agents and other third parties. This information may relate to the condition of the property, permitted or unpermitted uses, zoning, square footage, lot size/acreage or other matters affecting value or desirability. Unless otherwise indicated in writing, neither brokers, agents nor Theo have verified, or will verify, such information. If any such information is important to buyer in determining whether to buy, the price to pay or intended use of the property, buyer is urged to conduct their own investigation with qualified professionals, satisfy themselves with respect to that information, and to rely solely on the results of that investigation.

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