20990 Cornerstone Dr
Walnut, CA 91789
4 bd 3 ba 1,750 sqft Built 2018 Lot 17,468 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 | $455,130 | $333,267 | $788,397 | $9,752 |
| 2024 | $455,130 | $333,267 | $788,397 | $9,279 |
| 2023 | $437,457 | $320,327 | $757,784 | $9,048 |
| 2022 | $428,880 | $314,047 | $742,927 | $8,858 |
| 2021 | $420,471 | $307,890 | $728,361 | $8,691 |
| 2020 | $416,160 | $304,733 | $720,893 | $8,564 |
| 2019 | $408,000 | $298,758 | $706,758 | $8,395 |
| 2018 | $400,000 | $292,900 | $692,900 | $8,119 |
Property facts
Year built
2018
Property type
condo
Stories
—
Beds
4
Baths
3
Living area
1,750 sqft
Lot size
17,468 sqft
ZIP code
91789
City
Walnut
Street
Cornerstone Dr
Coordinates
34.01738, -117.84797
Comparable properties nearby
Frequently asked questions
When did 20990 Cornerstone Dr last sell?
No public-record sale is on file for 20990 Cornerstone Dr.
What is the current tax assessment for 20990 Cornerstone Dr?
The most recent total assessment for 20990 Cornerstone Dr (year 2025) is $788,397 with $9,752 in property tax.
When was 20990 Cornerstone Dr built?
20990 Cornerstone Dr was built in 2018.
How does 20990 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 20990 Cornerstone Dr?
20990 Cornerstone Dr is a 4 bed, 3 bath, 1,750 sqft, 17,468 sqft lot condo.
Is 20990 Cornerstone Dr a flip candidate?
No — 20990 Cornerstone Dr does not appear in our flips dataset.
Is 20990 Cornerstone Dr a tax-appeal candidate?
No — 20990 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