Listed by Guo Hui He, REALTY ONE GROUP WEST, (949) 297-2020
21055 Stonybrook Dr
Walnut, CA 91789
5 Beds
3 Baths
3,216 sqft (on 1.07 acres)
5 Beds
3 Baths
3,216 sqft
(on 1.07 acres)
We estimate this home will sell faster than 90% nearby.
Local Information
- Map ViewExplore the area around 21055 Stonybrook Dr.
- Schools1 Elementary School1 Middle School1 High School
- Shop & Eat
-- mins to
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 5 spacious bedrooms, 3 bathrooms, one enormous bedroom can be either bedroom or 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 exceptional 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!
This beautifully upgraded home features 5 spacious bedrooms, 3 bathrooms, one enormous bedroom can be either bedroom or 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 exceptional 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!
We estimate this home will sell faster than 90% nearby.
Open House
Saturday, July 11
1:00 PM to 4:00 PM
Home Highlights
Parking
3 Car Garage
Outdoor
Pool
A/C
Heating & Cooling
HOA
None
Price/Sqft
$668
Listed
27 days ago
Home Details for 21055 Stonybrook Dr
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Interior Details Number of Rooms: 8Types of Rooms: Bathroom, Bonus Room, Entry Foyer, Family Room, Kitchen, Laundry, Living Room |
Beds & Baths Number of Bedrooms: 5Main Level Bedrooms: 1Number of Bathrooms: 3Number of Bathrooms (full): 3Number of Bathrooms (main level): 1 |
Dimensions and Layout Living Area: 3216 Square Feet |
Appliances & Utilities Utilities: Electricity Connected, Natural Gas Connected, Sewer Connected, Water ConnectedAppliances: Dishwasher, Gas Range, Dryer, WasherDishwasherDryerWasher |
Heating & Cooling Heating: CentralHas CoolingAir Conditioning: Central AirHas HeatingHeating Fuel: Central |
Fireplace & Spa Fireplace: Dining RoomSpa: PrivateHas a FireplaceHas a Spa |
Gas & Electric Electric: Electricity - On Property |
Windows, Doors, Floors & Walls Door: Double Door EntryFlooring: Carpet, LaminateCommon Walls: No Common Walls |
Levels, Entrance, & Accessibility Stories: 2Number of Stories: 2Levels: TwoEntry Location: main entryFloors: Carpet, Laminate |
View Has a ViewView: Back Bay |
Security Security: Security Gate |
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Exterior Home Features Patio / Porch: NoneFencing: Fair ConditionHas a Private Pool |
Parking & Garage Number of Garage Spaces: 3Number of Covered Spaces: 3Has a GarageHas an Attached GarageParking Spaces: 3Parking: Driveway,Garage Faces Front |
Pool Pool: In Ground, PrivatePool |
Frontage Road Frontage: City StreetRoad Surface Type: PavedNot on Waterfront |
Water & Sewer Sewer: Public Sewer |
Surface & Elevation Elevation Units: Feet |
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Cumulative Days on Market: 27Days on Market: 27 |
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Year Built Year Built: 1988 |
Property Type / Style Property Type: ResidentialProperty Subtype: Single Family ResidenceStructure Type: HouseArchitecture: House |
Building Not a New ConstructionNot Attached PropertyNo Additional Parcels |
Property Information Parcel Number: 8709061032 |
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Price List Price: $2,149,000Price Per Sqft: $668 |
Status Change & Dates Off Market Date: Tue Jun 09 2026 |
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MLS Status: Active |
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Direction & Address City: Walnut |
School Information High School District: Walnut Valley Unified |
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Listing Agent Listing ID: CV26120174 |
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Community Features: CurbsNot Senior Community |
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Association for this Listing: California Regional MLSHOA Fee: No HOA Fee |
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Lot Area: 1.0687 Acres |
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Special Conditions: Standard |
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Listing Terms: Cash to Existing Loan |
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Mls Number: CV26120174Living Area Range Units: Square FeetWater ViewWater View: Back BayAttribution Contact: 626-589-7924Activation Date: Sat Jun 06 2026Back On Market Date: Sat Jun 13 2026Common Interest: NoneStart Showing Date: Sat Jun 06 2026Universal Property Id: US-06037-N-8709061032-R-N |
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CurbsSource Internet Entire Listing Display |
Last check for updates: about 1 hour ago
Listing Provided by: Guo Hui He DRE #01931347, (626) 589-7924
REALTY ONE GROUP WEST
Originating MLS: California Regional MLS
Source: CRMLS, MLS#CV26120174
Also Listed on CRMLS.
Market trends in Walnut
Last updated May 2026
Avg. sale price
—
Sale-to-List Price
—
Price per sq ft
—
Available listings
59
14MoM
Price History for 21055 Stonybrook Dr
| Date | Price | Event | Source |
|---|---|---|---|
| 07/05/2026 | $2,149,000 | PriceChange | CRMLS #CV26120174 |
| 06/06/2026 | $2,200,000 | Listed For Sale | CRMLS #CV26120174 |
| 09/21/2022 | ListingRemoved | Zillow Rental Manager | |
| 09/14/2022 | $4,300 | Listed For Rent | Zillow Rental Manager |
| 06/24/2020 | $4,200 | ListingRemoved | Agent Provided |
| 06/08/2020 | $4,200 | Listed For Rent | Agent Provided |
| 08/29/2019 | $4,500 | ListingRemoved | Agent Provided |
| 08/12/2019 | $4,500 | Listed For Rent | Agent Provided |
| 08/23/2018 | $4,200 | ListingRemoved | Agent Provided |
| 07/18/2018 | $4,200 | Listed For Rent | Agent Provided |
| 10/07/2014 | $1,568,000 | Sold | N/A |
| 08/22/2014 | $1,558,000 | Pending | Agent Provided |
| 08/04/2014 | $1,558,000 | Listed For Sale | Agent Provided |
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Property Tax and Assessment
| Year | 2025 |
|---|---|
| Tax | $23,460 |
| Assessment | $1,884,492 |
Home facts updated by county records
Comparable Sales for 21055 Stonybrook Dr
Address | Distance | Property Type | Sold Price | Sold Date | Bed | Bath | Sqft |
|---|---|---|---|---|---|---|---|
0.15 | Single-Family Home | $1,830,000 | 05/12/26 | 4 | 4 | 2,789 | |
0.32 | Single-Family Home | $1,911,880 | 04/17/26 | 5 | 3 | 2,755 | |
0.37 | Single-Family Home | $1,480,000 | 07/21/25 | 4 | 3 | 3,235 | |
0.34 | Single-Family Home | $1,620,000 | 02/05/26 | 4 | 3 | 2,423 | |
0.30 | Single-Family Home | $1,933,500 | 04/16/26 | 5 | 5 | 3,736 | |
0.30 | Single-Family Home | $1,480,000 | 07/16/25 | 4 | 3 | 2,614 | |
0.48 | Single-Family Home | $1,735,000 | 02/27/26 | 4 | 3 | 2,355 | |
0.53 | Single-Family Home | $1,505,000 | 10/10/25 | 4 | 3 | 2,273 | |
0.54 | Single-Family Home | $1,638,000 | 06/12/26 | 4 | 3 | 2,273 | |
0.41 | Single-Family Home | $1,920,000 | 01/02/26 | 5 | 3.5 | 3,195 |
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Assigned Schools
These are the assigned schools for 21055 Stonybrook Dr.
- Suzanne Middle School
- 6-8
- Public
- 1190 Students
10/10GreatSchools RatingParent Rating AverageAbsolutely atrocious. Students were not taught the difference between right and wrong. Teachers do absolutely nothing to stop bullying. Also, according to the office manager, my kid- along with a few others are the only ones that passed the state tests.Parent Review7y ago - Walnut High School
- 9-12
- Public
- 2148 Students
10/10GreatSchools RatingParent Rating AverageThis is my last year in high school for me but that doesn’t mean I can forget about walnut high school. Through out my years at walnut high school I have learned a lot from them and that is because of the counselors, our teachers and principal. Without them we as students wouldn’t have gone far in high school. All of the sports and really good because of the couches we have and there dedication to the team and to the school. So I would definitely recommend walnut high school for your kids.Student Review5y ago - Leonard G. Westhoff Elementary School
- K-5
- Public
- 654 Students
9/10GreatSchools RatingParent Rating AverageI have been a parent at this elementary school for 3 years now and I must say that the experience that my child has at this school is beyond expectations. All of the kids at school are well-mannered and promote a safe and fun environment to be in. Never once, has my child said they didn't want to go to school! The facilities, programs, staff, teachers and principal are all top-notch. That's saying a lot for being a school within the very competitive WVUSD school district. Westhoff truly is the Best in the West!Parent Review2y ago 
Check out schools near 21055 Stonybrook Dr.
What Locals Say about Walnut
At least 124 Trulia users voted on each feature.
88 % Say there are sidewalks
88 % Say parking is easy
81 % Say car is needed
81 % Say yards are well-kept
80 % Say it's dog friendly
74 % Say it's quiet
72 % Say streets are well-lit
68 % Say people would walk alone at night
63 % Say it's walkable to grocery stores
63 % Say there's holiday spirit
62 % Say there's wildlife
62 % Say they plan to stay for at least 5 years
47 % Say neighbors are friendly
44 % Say it's walkable to restaurants
44 % Say kids play outside
29 % Say there are community events
Sourced by Trulia users. Learn more about our methodology.
LGBTQ Local Legal Protections
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Guo Hui He, REALTY ONE GROUP WEST
Agent Phone: (626) 589-7924
The multiple listing data appearing on this website, or contained in reports produced therefrom, is owned and copyrighted by California Regional Multiple Listing Service, Inc. ("CRMLS") and is protected by all applicable copyright laws. Information provided is for viewer's personal, non-commercial use and may not be used for any purpose other than to identify prospective properties the viewer may be interested in purchasing. All listing data, including but not limited to square footage and lot size is believed to be accurate, but the listing Agent, listing Broker and CRMLS and its affiliates do not warrant or guarantee such accuracy. The viewer should independently verify the listed data prior to making any decisions based on such information by personal inspection and/or contacting a real estate professional.
Based on information from California Regional Multiple Listing Service, Inc. as of 2026-02-09 09:51:42 PST 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
Based on information from California Regional Multiple Listing Service, Inc. as of 2026-02-09 09:51:42 PST 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
21055 Stonybrook Dr, Walnut, CA 91789 is a 5 bedroom, 3 bathroom, 3,216 sqft single-family home built in 1988. This property is currently available for sale and was listed by CRMLS on Jun 3, 2026. The MLS # for this home is MLS# CV26120174.