21012 Cornerstone Dr
Walnut, CA 91789
4 bd 4 ba 1,820 sqft Built 2018 Lot 17,454 sqft townhomes
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 | $333,279 | $507,768 | $841,047 | $10,367 |
| 2024 | $333,279 | $507,768 | $841,047 | $9,866 |
| 2023 | $320,339 | $488,051 | $808,390 | $9,620 |
| 2022 | $314,058 | $478,482 | $792,540 | $9,418 |
| 2021 | $467,774 | $262,794 | $730,568 | $8,707 |
| 2020 | $462,978 | $260,100 | $723,078 | $8,594 |
| 2019 | $453,900 | $255,000 | $708,900 | $8,410 |
| 2018 | $445,000 | $250,000 | $695,000 | $8,152 |
| 2017 | — | $203,148 | $203,148 | $2,347 |
Property facts
Year built
2018
Property type
townhomes
Stories
3
Beds
4
Baths
4
Living area
1,820 sqft
Lot size
17,454 sqft
ZIP code
91789
City
Walnut
Street
Cornerstone Dr
Coordinates
34.01757, -117.84759
Comparable properties nearby
Block-level micro-comps
Same street, ±3 house numbers, sold in the last 24 monthsFrequently asked questions
When did 21012 Cornerstone Dr last sell?
No public-record sale is on file for 21012 Cornerstone Dr.
What is the current tax assessment for 21012 Cornerstone Dr?
The most recent total assessment for 21012 Cornerstone Dr (year 2025) is $841,047 with $10,367 in property tax.
When was 21012 Cornerstone Dr built?
21012 Cornerstone Dr was built in 2018.
How does 21012 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 21012 Cornerstone Dr?
21012 Cornerstone Dr is a 4 bed, 4 bath, 1,820 sqft, 17,454 sqft lot townhomes.
Is 21012 Cornerstone Dr a flip candidate?
No — 21012 Cornerstone Dr does not appear in our flips dataset.
Is 21012 Cornerstone Dr a tax-appeal candidate?
No — 21012 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