21050 Cornerstone Dr
Walnut, CA 91789
4 bd 3 ba 1,830 sqft Built 2018 Lot 19,912 sqft condo
No recorded sales
Location
Timeline: Sale, Listing & Tax History
Recorded events
No recorded events
No sale or listing events are on file for this property.
Tax assessment history
| Year | Building | Land | Total assessed | Tax paid |
|---|---|---|---|---|
| 2025 | $323,722 | $529,088 | $852,810 | $10,598 |
| 2024 | $323,722 | $529,088 | $852,810 | $10,091 |
| 2023 | $311,152 | $508,544 | $819,696 | $9,841 |
| 2022 | $305,051 | $498,573 | $803,624 | $9,636 |
| 2021 | $299,070 | $488,798 | $787,868 | $9,457 |
| 2020 | $296,004 | $483,786 | $779,790 | $9,336 |
| 2019 | $290,200 | $474,300 | $764,500 | $9,153 |
| 2018 | — | $207,210 | $207,210 | $2,759 |
Property facts
Year built
2018
Property type
condo
Stories
—
Beds
4
Baths
3
Living area
1,830 sqft
Lot size
19,912 sqft
ZIP code
91789
City
Walnut
Street
Cornerstone Dr
Coordinates
34.01786, -117.84721
Comparable properties nearby
Block-level micro-comps
Same street, ±3 house numbers, sold in the last 24 monthsFrequently asked questions
When did 21050 Cornerstone Dr last sell?
No public-record sale is on file for 21050 Cornerstone Dr.
What is the current tax assessment for 21050 Cornerstone Dr?
The most recent total assessment for 21050 Cornerstone Dr (year 2025) is $852,810 with $10,598 in property tax.
When was 21050 Cornerstone Dr built?
21050 Cornerstone Dr was built in 2018.
How does 21050 Cornerstone Dr compare to others on Cornerstone Dr?
We track 8 other properties on Cornerstone Dr. Browse the list under "Other properties on Cornerstone Dr" to compare beds, baths, and sale history.
What are the property facts for 21050 Cornerstone Dr?
21050 Cornerstone Dr is a 4 bed, 3 bath, 1,830 sqft, 19,912 sqft lot condo.
Is 21050 Cornerstone Dr a flip candidate?
No — 21050 Cornerstone Dr does not appear in our flips dataset.
Is 21050 Cornerstone Dr a tax-appeal candidate?
No — 21050 Cornerstone Dr is not currently flagged as a tax-appeal candidate.
Forecast for this area
ZIP-area linear projection — not a per-property automated valuationQuarterly trend
+5.8%
Implied 1-yr
+23.2%
2026 Q3
$1.76M
2026 Q4
$1.84M
ZIP 91789 — Median Price History + Forecast
Explore nearby
Geography
Other properties on Cornerstone Dr