21001 Costilla Dr
Diamond Bar, CA 91765
4 bd 2 ba 1,288 sqft Built 1963 Lot 10,376 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 | $149,374 | $597,501 | $746,875 | $9,528 |
| 2024 | $149,374 | $597,501 | $746,875 | $9,103 |
| 2023 | $143,575 | $574,300 | $717,875 | $8,886 |
| 2022 | $140,760 | $563,040 | $703,800 | $8,702 |
| 2021 | $106,589 | $426,363 | $532,952 | $6,739 |
| 2020 | $105,497 | $421,992 | $527,489 | $6,655 |
| 2019 | $103,429 | $413,718 | $517,147 | $6,528 |
| 2018 | $101,401 | $405,606 | $507,007 | $6,251 |
| 2017 | $99,413 | $397,653 | $497,066 | $5,967 |
| 2016 | $97,464 | $389,856 | $487,320 | $5,799 |
| 2015 | $83,852 | $156,546 | $240,398 | $3,155 |
| 2014 | $82,210 | $153,480 | $235,690 | $3,164 |
| 2013 | $81,839 | $152,787 | $234,626 | $3,133 |
| 2012 | $80,235 | $149,792 | $230,027 | $3,122 |
| 2010 | $78,662 | $146,855 | $225,517 | $3,009 |
| 2009 | $78,075 | $145,758 | $223,833 | $2,990 |
| 2008 | $76,727 | $143,241 | $219,968 | $2,905 |
| 2007 | $75,223 | $140,433 | $215,656 | $2,756 |
Property facts
Year built
1963
Property type
single_family
Stories
1
Beds
4
Baths
2
Living area
1,288 sqft
Lot size
10,376 sqft
ZIP code
91765
City
Diamond Bar
Street
Costilla Dr
Coordinates
33.97122, -117.84559
Comparable properties nearby
Frequently asked questions
When did 21001 Costilla Dr last sell?
No public-record sale is on file for 21001 Costilla Dr.
What is the current tax assessment for 21001 Costilla Dr?
The most recent total assessment for 21001 Costilla Dr (year 2025) is $746,875 with $9,528 in property tax.
When was 21001 Costilla Dr built?
21001 Costilla Dr was built in 1963.
How does 21001 Costilla Dr compare to others on Costilla Dr?
We do not currently track other properties on Costilla Dr.
What are the property facts for 21001 Costilla Dr?
21001 Costilla Dr is a 4 bed, 2 bath, 1,288 sqft, 10,376 sqft lot single_family.
Is 21001 Costilla Dr a flip candidate?
No — 21001 Costilla Dr does not appear in our flips dataset.
Is 21001 Costilla Dr a tax-appeal candidate?
No — 21001 Costilla 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
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Geography