21101 Aspen Ave
Castro Valley, CA 94546
3 bd 1 ba 1,660 sqft Built 1954 Lot 5,390 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 | $452,691 | $193,923 | $646,614 | $8,499 |
| 2024 | $452,691 | $193,923 | $646,614 | $8,308 |
| 2023 | $435,116 | $186,394 | $621,510 | $8,173 |
| 2022 | $426,585 | $182,739 | $609,324 | $8,014 |
| 2021 | $418,224 | $179,158 | $597,382 | $7,809 |
| 2020 | $413,937 | $177,321 | $591,258 | $7,549 |
| 2019 | $405,823 | $173,845 | $579,668 | $7,685 |
| 2018 | $397,869 | $170,438 | $568,307 | $7,467 |
| 2017 | $390,069 | $167,097 | $557,166 | $7,270 |
| 2016 | $382,421 | $163,820 | $546,241 | $6,917 |
| 2015 | $376,678 | $161,360 | $538,038 | $6,542 |
| 2014 | $41,962 | $39,413 | $81,375 | $1,389 |
| 2013 | $41,772 | $39,235 | $81,007 | $1,354 |
| 2012 | $40,953 | $38,465 | $79,418 | $1,315 |
| 2010 | $40,150 | $37,711 | $77,861 | $1,281 |
| 2009 | $39,850 | $37,430 | $77,280 | $1,274 |
| 2008 | $39,162 | $36,783 | $75,945 | $1,193 |
| 2007 | $38,394 | $36,062 | $74,456 | $1,159 |
Property facts
Year built
1954
Property type
single_family
Stories
2
Beds
3
Baths
1
Living area
1,660 sqft
Lot size
5,390 sqft
ZIP code
94546
City
Castro Valley
Street
Aspen Ave
Coordinates
37.69342, -122.06894
Comparable properties nearby
Frequently asked questions
When did 21101 Aspen Ave last sell?
No public-record sale is on file for 21101 Aspen Ave.
What is the current tax assessment for 21101 Aspen Ave?
The most recent total assessment for 21101 Aspen Ave (year 2025) is $646,614 with $8,499 in property tax.
When was 21101 Aspen Ave built?
21101 Aspen Ave was built in 1954.
How does 21101 Aspen Ave compare to others on Aspen Ave?
We do not currently track other properties on Aspen Ave.
What are the property facts for 21101 Aspen Ave?
21101 Aspen Ave is a 3 bed, 1 bath, 1,660 sqft, 5,390 sqft lot single_family.
Is 21101 Aspen Ave a flip candidate?
No — 21101 Aspen Ave does not appear in our flips dataset.
Is 21101 Aspen Ave a tax-appeal candidate?
No — 21101 Aspen Ave is not currently flagged as a tax-appeal candidate.
Forecast for this area
ZIP-area linear projection — not a per-property automated valuationQuarterly trend
-2.1%
Implied 1-yr
-8.4%
2026 Q3
$875.4K
2026 Q4
$875.4K
ZIP 94546 — Median Price History + Forecast
Explore nearby
Geography