# 21010 Cornerstone, Walnut, CA 91789

> **TL;DR:** 4bd/3ba condo, $948,000 ($518/sqft), built 2018, 1,830 sqft.
> Spa, A/C, 2-car garage. Est. $5,377/mo. Listed 15 days.

## Property at a Glance

| Attribute | Value |
|-----------|-------|
| Price | $948,000 |
| Price/sqft | $518 |
| Bedrooms | 4 |
| Bathrooms | 3 full |
| Square Feet | 1,830 |
| Year Built | 2018 |
| Lot Size | 17,472 sqft (0.40 acres) |
| Stories | 3 |
| Garage | 2-car |
| Property Type | Condo (Condominium) |
| Status | Active |
| Days on Market | 15 |

## Estimated Monthly Costs

| Category | Amount |
|----------|--------|
| Principal & Interest (20% down, 30-year at 6.5%) | $4,794 |
| Estimated Insurance | $277 |
| HOA | $306 |
| **Total** | **$5,377** |

## Key Amenities

- Spa
- A/C
- 2-car garage

## Property Highlights

- Built in 2018
- 0.40 acre lot
- 3 stories
- 2 parking spaces

## Description

### Agent Description
Welcome to 21010 Cornerstone, nestled in a highly sought-after neighborhood in Walnut. This spacious 4-bedroom, 3-bathroom home offers a wonderful blend of comfort, functionality, and inviting living spaces, making it an ideal place to call home. The thoughtfully designed interior features an updated kitchen that opens seamlessly into a spacious living room, creating an open and welcoming atmosphere perfect for entertaining guests or enjoying everyday living. The expansive main living area provides plenty of room to gather with family and friends, while a beautiful private balcony just off the living space offers the perfect spot to enjoy the fresh air, unwind, and relax. The generously sized primary suite serves as a comfortable retreat, complete with a walk-in closet and an en-suite bathroom featuring a dual-sink vanity and walk-in shower. Additional conveniences include a dedicated laundry room and an attached two-car garage, providing practical storage and everyday ease. Beyond the home itself, residents can enjoy a desirable community lifestyle with access to a swimming pool, neighborhood park, and BBQ area-ideal for outdoor recreation, gatherings, and making lasting memories. Located within a community surrounded by award-winning schools, this property offers an appealing combination of space, convenience, and lifestyle in the heart of Walnut. With its inviting layout, desirable amenities, and sought-after location, 21010 Cornerstone presents a wonderful opportunity to enjoy comfortable living in a welcoming community.

## Location

- **Address:** 21010 Cornerstone, Walnut, CA 91789
- **County:** Los Angeles

## Listing Agent

- **Name:** AJ Hoover · **License:** 02040196
- **Brokerage:** House of Seven Gables Real Estate Inc.
- **Broker Phone:** (714) 731-3777

## Photos

![21010 Cornerstone - Photo 1](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f911407167r.jpg)

![21010 Cornerstone - Photo 2](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f4098197480r.jpg)

![21010 Cornerstone - Photo 3](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f509514377r.jpg)

![21010 Cornerstone - Photo 4](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f2195681194r.jpg)

![21010 Cornerstone - Photo 5](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f64576348r.jpg)

![21010 Cornerstone - Photo 6](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f4219310923r.jpg)

![21010 Cornerstone - Photo 7](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f468601407r.jpg)

![21010 Cornerstone - Photo 8](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f3097917899r.jpg)

![21010 Cornerstone - Photo 9](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f2047306906r.jpg)

![21010 Cornerstone - Photo 10](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f2061890623r.jpg)

![21010 Cornerstone - Photo 11](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f2482029868r.jpg)

![21010 Cornerstone - Photo 12](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f2130017469r.jpg)

![21010 Cornerstone - Photo 13](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f854865283r.jpg)

![21010 Cornerstone - Photo 14](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f2459702519r.jpg)

![21010 Cornerstone - Photo 15](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f2191696278r.jpg)

![21010 Cornerstone - Photo 16](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f802482576r.jpg)

![21010 Cornerstone - Photo 17](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f1696545075r.jpg)

![21010 Cornerstone - Photo 18](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f1065533852r.jpg)

![21010 Cornerstone - Photo 19](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f2392821194r.jpg)

![21010 Cornerstone - Photo 20](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f2008692223r.jpg)

![21010 Cornerstone - Photo 21](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f3950605811r.jpg)

![21010 Cornerstone - Photo 22](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f1145530921r.jpg)

![21010 Cornerstone - Photo 23](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f3760285428r.jpg)

![21010 Cornerstone - Photo 24](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f702999934r.jpg)

![21010 Cornerstone - Photo 25](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f1975948946r.jpg)

![21010 Cornerstone - Photo 26](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f3559703265r.jpg)

![21010 Cornerstone - Photo 27](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f590150695r.jpg)

![21010 Cornerstone - Photo 28](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f1367790454r.jpg)

![21010 Cornerstone - Photo 29](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f3982560846r.jpg)

![21010 Cornerstone - Photo 30](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f3913041806r.jpg)

![21010 Cornerstone - Photo 31](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f99878200r.jpg)

![21010 Cornerstone - Photo 32](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f1040925495r.jpg)

![21010 Cornerstone - Photo 33](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f4117964872r.jpg)

![21010 Cornerstone - Photo 34](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f963422620r.jpg)

![21010 Cornerstone - Photo 35](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f997327059r.jpg)

![21010 Cornerstone - Photo 36](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f4194751831r.jpg)

![21010 Cornerstone - Photo 37](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f1211701144r.jpg)

![21010 Cornerstone - Photo 38](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f2637703676r.jpg)

![21010 Cornerstone - Photo 39](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f487957502r.jpg)

![21010 Cornerstone - Photo 40](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f1380917319r.jpg)

![21010 Cornerstone - Photo 41](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f2149627800r.jpg)

![21010 Cornerstone - Photo 42](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f1153738925r.jpg)

![21010 Cornerstone - Photo 43](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f3728124539r.jpg)

![21010 Cornerstone - Photo 44](http://lh.rdcpix.com/5da68652f6c18479cc0b65344db6f8fbl-f3497593174r.jpg)

---

**MLS#:** PW26223459 | **Updated:** 2026-10-27
**Source:** listhub

*Copyright © 2026 California Regional Multiple Listing Service, Inc. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.*

[View on PropertySimple](https://www.propertysimple.ai/listing/21010-cornerstone-walnut-ca-91789-713d0eefc75440a58449161a34b0b62f)

---

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}
```