Active Open Saturday 06/13 4 PM-7 PM

21055 Stonybrook Drive

Walnut, CA 91789

$2,200,000 $9,275/Mo

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Overview

Bed

Bath

3,216

Sqft

46,552

Sqft(Lot)

Description

Welcome to 21055 Stonybrook Rd, Walnut, CA 91789 — a rare private estate located in one of Walnut’s most desirable neighborhoods and served by the highly acclaimed Westhoff Elementary School in the award-winning Walnut Valley Unified School District. This beautifully upgraded home features 4 spacious bedrooms, 3 bathrooms, and an enormous bonus playroom perfect for a game room, home theater, gym, or children’s entertainment space. Thoughtfully updated throughout, the home offers both comfort and functionality with an ideal layout for modern living and entertaining. Situated behind gates for added privacy and security, the property welcomes you with a long private driveway leading to the home, creating a peaceful estate-like setting. Nestled on an expansive 1.07-acre lot, this except ional property offers incredible space and future potential, including room for an ADU or guest house. The resort-style backyard is truly an entertainer’s dream, featuring a large sparkling pool and spa surrounded by mature landscaping and open space. Whether hosting gatherings, relaxing with family, or enjoying the serene setting, this backyard offers endless possibilities for indoor-outdoor California living. Rarely does a property combine privacy, acreage, luxury amenities, top-rated schools, and future expansion potential all in one exceptional offering. Conveniently located near parks, shopping, dining, and easy freeway access, this Walnut gem truly has it all. Don’t miss this extraordinary opportunity to own a private estate in the heart of Walnut!

Property Details

Property Type : Residential

Price : $2,200,000

AD Id : 79840837

MLS Id : CV26120174

Beds : 4

Lot Size : 46,552 Sqft

Living Area Size : 3,216

Year Built : 1988

Garage : 2

County : Los Angeles

Open House

06/13 4 PM-7 PM
06/14 4 PM-7 PM

Map

What's Nearby

Nearby Areas

Features

Bedroom Information

Total Bedrooms: 4

Bathroom Information

Total Baths: 3 Full Baths: 3

Water/Sewer

Water Source: Public Sewer: Public Sewer
Interior Features

Interior Features: Ceiling Fan(s) Property Appliances: Dishwasher,Gas Range,Dryer,Washer Fireplace: Dining Room Flooring: Carpet,Laminate
Cooling Features

Central Air Air Conditioning

Heating Source

Central Has Heating

Fireplace

Fireplace Features: Dining Room Has Fireplace: 1

Building Information

Year Built: 1988
Security Features

Security Gate
Pool Features

In Ground,Private

Patio And Porch

None

Fencing

Fair Condition

Lot Details

Lot Dimensions Source: Vendor Enhanced Lot Size Acres: 1.0687
Lot Size Source: Assessor Lot Size Square Feet: 46552

Listing Price Information

Original List Price: 2,200,000 Listing Contract Date: 2026-06-01
Lease Information

Listing Agreement: Exclusive Right To Sell

Tax Information

Parcel Number: 8709061032

Garage and Parking

Garage Description: Driveway,Garage Faces Front Attached Garage: Yes

Homeowners Association

Other Property Info

Source Listing Status: Active Source Neighborhood: 668 - Walnut Postal Code Plus 4: 9178 Directions: Grand Ave & Stonybrook Drive Source Property Type: Residential Area: 668 - Walnut Property SubType: Single Family Residence
Building and Construction

Property Age: 38 Common Walls: No Common Walls Structure Type: Single Family Residence Year Built Source: Assessor Total Square Feet Living: 3216 Entry Level: 1 Entry Location: main entry Levels or Stories: Two Building Total Stories: 2 Structure Type: House

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Nearby Home Value

Address	Estimate	Bed	Bath	Sq. Ft	Lot Size
3745 Valley Boulevard #24, Walnut, CA, 91789	$138,000	2	1	1,288	1,288 SqFt
3745 Valley Boulevard #.., Walnut, CA, 91789	$150,000	2	2	1,248	1,248 SqFt
3825 Valley Blvd #36, Walnut, CA, 91789	$117,000	2	1	675	675 SqFt
3825 Valley Boulevard #23, Walnut, CA, 91789	$199,900	3	2	1,288	1,288 SqFt
3825 Valley Blvd #25, Walnut, CA, 91789	$134,995	2	2	--
3825 Valley Boulevard #46, Walnut, CA, 91789	$69,990	1	1	576	576 SqFt
3825 Valley Boulevard #17, Walnut, CA, 91789	$229,000	3	2	1,428	1,428 SqFt
22092 Portofino Avenue, Walnut, CA, 91789	$1,820,000	4	4	2,325	2,325 SqFt
22129 Portofino Avenue, Walnut, CA, 91789	$1,708,048	4	3	2,514	2,514 SqFt
22085 Manarola Way, Walnut, CA, 91789	$2,791,161	5	4	3,728	3,728 SqFt

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ByOwner last updated this listing 06/08/2026 @ 04:18

MLS: CV26120174 LISTED BY: Guo Hui He, REALTY ONE GROUP WEST 949-297-2020 SOURCE: CRMLS