21720 Lost River Dr
Diamond Bar, CA 91765
4 bd 2 ba 1,288 sqft Built 1963 Lot 9,089 sqft single_family
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 | $188,244 | $568,451 | $756,695 | $9,646 |
| 2024 | $188,244 | $568,451 | $756,695 | $9,251 |
| 2023 | $180,935 | $546,378 | $727,313 | $9,030 |
| 2022 | $177,388 | $535,665 | $713,053 | $8,844 |
| 2021 | $173,910 | $525,162 | $699,072 | $8,686 |
| 2020 | $172,127 | $519,778 | $691,905 | $8,577 |
| 2019 | $168,752 | $509,587 | $678,339 | $8,413 |
| 2018 | $165,444 | $499,596 | $665,040 | $8,036 |
| 2017 | $110,490 | $441,980 | $552,470 | $6,570 |
| 2016 | $108,324 | $433,314 | $541,638 | $6,386 |
| 2015 | $106,697 | $426,806 | $533,503 | $6,424 |
| 2014 | $104,607 | $418,446 | $523,053 | $6,432 |
| 2013 | $87,000 | $345,000 | $432,000 | $5,370 |
| 2012 | $79,000 | $315,000 | $394,000 | $5,013 |
| 2010 | $79,000 | $315,000 | $394,000 | $4,955 |
| 2009 | $79,000 | $315,000 | $394,000 | $5,697 |
| 2008 | $97,630 | $390,524 | $488,154 | $5,956 |
| 2007 | $95,716 | $382,867 | $478,583 | $5,658 |
Property facts
Year built
1963
Property type
single_family
Stories
—
Beds
4
Baths
2
Living area
1,288 sqft
Lot size
9,089 sqft
ZIP code
91765
City
Diamond Bar
Street
Lost River Dr
Coordinates
33.98071, -117.83323
Comparable properties nearby
Frequently asked questions
When did 21720 Lost River Dr last sell?
No public-record sale is on file for 21720 Lost River Dr.
What is the current tax assessment for 21720 Lost River Dr?
The most recent total assessment for 21720 Lost River Dr (year 2025) is $756,695 with $9,646 in property tax.
When was 21720 Lost River Dr built?
21720 Lost River Dr was built in 1963.
How does 21720 Lost River Dr compare to others on Lost River Dr?
We track 4 other properties on Lost River Dr. Browse the list under "Other properties on Lost River Dr" to compare beds, baths, and sale history.
What are the property facts for 21720 Lost River Dr?
21720 Lost River Dr is a 4 bed, 2 bath, 1,288 sqft, 9,089 sqft lot single_family.
Is 21720 Lost River Dr a flip candidate?
No — 21720 Lost River Dr does not appear in our flips dataset.
Is 21720 Lost River Dr a tax-appeal candidate?
No — 21720 Lost River 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
+1.0%
Implied 1-yr
+4.1%
2026 Q3
$1.43M
2026 Q4
$1.44M
ZIP 91765 — Median Price History + Forecast
Explore nearby
Geography
Other properties on Lost River Dr