20988 Cornerstone Dr
Walnut, CA 91789
3 Beds
4 Baths
1,760 sqft (on 0.40 acres)
3 Beds
4 Baths
1,760 sqft
(on 0.40 acres)
Local Information
- Map ViewExplore the area around 20988 Cornerstone Dr.
- Schools1 Elementary School1 Middle School1 High School
- Shop & Eat
-- mins to
Description
This apartment is located at 20988 Cornerstone Dr, Walnut, CA. 20988 Cornerstone Dr is in Walnut, CA and in ZIP code 91789. This property has 3 bedrooms, 4 bathrooms and approximately 1,760 sqft of floor space. This property has a lot size of 0.40 acres and was built in 2017.
This property is off market, which means it's not currently listed for sale or rent on Trulia. This may be different from what's available on other websites or public sources.
Home Highlights
Parking
Garage
Outdoor
No Info
A/C
Heating & Cooling
HOA
None
Price/Sqft
No Info
Listed
Less than a day ago
Home Details for 20988 Cornerstone Dr
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Heating & Cooling Heating: Forced AirAir ConditioningCooling System: CentralHeating Fuel: Forced Air |
Interior Details Types of Rooms: Walk In Closet, Family Room, Master Bath |
Appliances & Utilities DryerWasher |
Levels, Entrance, & Accessibility Floors: Hardwood |
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Year Built Year Built: 2017 |
Property Type / Style Property Type: Apartment |
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Furnished |
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Parking & Garage GarageParking Spaces: 2Parking: Garage Attached, Off Street |
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Units in Building: 1 |
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Lot Area: 0.40 acres |
Price History for 20988 Cornerstone Dr
| Date | Price | Event | Source |
|---|---|---|---|
| 12/28/2025 | $3,700 | ListingRemoved | CRMLS #WS25260520 |
| 11/15/2025 | $3,700 | Listed For Rent | CRMLS #WS25260520 |
| 10/23/2023 | ListingRemoved | Zillow Rentals | |
| 08/23/2023 | $3,800 | Listed For Rent | Zillow Rentals |
| 03/21/2018 | $656,454 | Sold | N/A |
Market trends in Walnut
Last updated May 2026
Avg. sale price
—
Sale-to-List Price
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Price per sq ft
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Available listings
59
14MoM
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Property Tax and Assessment
| Year | 2025 |
|---|---|
| Tax | $9,358 |
| Assessment | $747,548 |
Home facts updated by county records
Comparable Sales for 20988 Cornerstone Dr
Address | Distance | Property Type | Sold Price | Sold Date | Bed | Bath | Sqft |
|---|---|---|---|---|---|---|---|
2.21 | Multi-Family Home | $1,588,168 | 01/09/26 | 1 | 1 | 300 | |
2.38 | Apartment | $310,000 | 10/22/25 | 1 | 1 | 768 | |
2.38 | Apartment | $320,000 | 08/29/25 | 2 | 2 | 949 | |
2.61 | Apartment | $572,033 | 03/05/26 | 2 | 1.5 | 1,048 | |
2.38 | Apartment | $310,000 | 07/10/25 | 2 | 1 | 807 | |
3.90 | Apartment | $679,000 | 05/27/26 | 3 | 3 | 1,442 | |
3.76 | Apartment | $400,000 | 02/05/26 | 2 | 1 | 968 | |
5.22 | Apartment | $1,260,000 | 12/05/25 | 3 | 2 | 1,202 | |
5.51 | Apartment | $640,000 | 06/27/25 | 3 | 4 | 1,791 | |
5.81 | Apartment | $255,000 | 12/10/25 | 3 | 2 | 1,140 |
Home facts updated by county records
Nearby homes
Get a sense of prices in the area by checking nearby homes.
SOLDAPR 2, 2026HomeSmart, Evergreen Realty
SOLDOCT 16, 2025Lotus Property Services, Inc.
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Assigned Schools
These are the assigned schools for 20988 Cornerstone 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 - Vejar Elementary School
- K-5
- Public
- 631 Students
8/10GreatSchools RatingParent Rating AverageThis is our 3rd year at this school (k-2nd) two of our children currently attend. We love the staff, we love how involved the principal is, and have had some great luck with teachers. My children are truly cared for and we are looking forward to my daughter starting TK next year.Parent Review4y 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 
Check out schools near 20988 Cornerstone Dr.
What Locals Say about Walnut
At least 123 Trulia users voted on each feature.
88 % Say there are sidewalks
88 % Say parking is easy
81 % Say car is needed
80 % Say yards are well-kept
80 % Say it's dog friendly
74 % Say it's quiet
71 % 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
43 % Say it's walkable to restaurants
43 % Say kids play outside
29 % Say there are community events
Sourced by Trulia users. Learn more about our methodology.
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20988 Cornerstone Dr, Walnut, CA 91789 is a 3 bedroom, 4 bathroom, 1,760 sqft apartment built in 2017. This property is not currently available for sale. 20988 Cornerstone Dr was last sold on Mar 21, 2018 for $656,454. The current Trulia Estimate for 20988 Cornerstone Dr is $901,400.