20978 Cornerstone Dr
Walnut, CA 91789
4 bd 3 ba 1,750 sqft Built 2018 Lot 17,436 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 | $305,027 | $431,023 | $736,050 | $9,140 |
| 2024 | $305,027 | $431,023 | $736,050 | $8,686 |
| 2023 | $293,184 | $414,287 | $707,471 | $8,470 |
| 2022 | $287,436 | $406,164 | $693,600 | $8,292 |
| 2021 | $281,800 | $398,200 | $680,000 | $8,215 |
| 2020 | $268,215 | $428,852 | $697,067 | $8,371 |
| 2019 | $262,956 | $420,444 | $683,400 | $8,207 |
| 2018 | $257,800 | $412,200 | $670,000 | $7,939 |
Property facts
Year built
2018
Property type
condo
Stories
—
Beds
4
Baths
3
Living area
1,750 sqft
Lot size
17,436 sqft
ZIP code
91789
City
Walnut
Street
Cornerstone Dr
Coordinates
34.01716, -117.84833
Comparable properties nearby
Block-level micro-comps
Same street, ±3 house numbers, sold in the last 24 monthsFrequently asked questions
When did 20978 Cornerstone Dr last sell?
No public-record sale is on file for 20978 Cornerstone Dr.
What is the current tax assessment for 20978 Cornerstone Dr?
The most recent total assessment for 20978 Cornerstone Dr (year 2025) is $736,050 with $9,140 in property tax.
When was 20978 Cornerstone Dr built?
20978 Cornerstone Dr was built in 2018.
How does 20978 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 20978 Cornerstone Dr?
20978 Cornerstone Dr is a 4 bed, 3 bath, 1,750 sqft, 17,436 sqft lot condo.
Is 20978 Cornerstone Dr a flip candidate?
No — 20978 Cornerstone Dr does not appear in our flips dataset.
Is 20978 Cornerstone Dr a tax-appeal candidate?
No — 20978 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