21661 Knoll Way
Castro Valley, CA 94546
3 bd 2 ba 2,014 sqft Built 1961 Lot 6,262 sqft single_family
Most recent sale
$510,000
Mar 4, 2009
Location
Timeline: Sale, Listing & Tax History
Recorded events
| Date | Event | Price | Source |
|---|---|---|---|
| Apr 26, 2024 | Listed | $1,100,000 | BayEast |
| Mar 4, 2009 | Sold | $510,000 | ContraCosta |
| Oct 28, 2008 | Listed | $569,000 | ContraCosta |
Tax assessment history
| Year | Building | Land | Total assessed | Tax paid |
|---|---|---|---|---|
| 2025 | $892,500 | $382,500 | $1,275,000 | $15,957 |
| 2024 | $892,500 | $382,500 | $1,275,000 | $8,364 |
| 2023 | $441,851 | $189,365 | $631,216 | $8,268 |
| 2022 | $433,190 | $185,653 | $618,843 | $8,082 |
| 2021 | $424,697 | $182,013 | $606,710 | $7,988 |
| 2020 | $420,346 | $180,148 | $600,494 | $7,869 |
| 2019 | $412,106 | $176,617 | $588,723 | $7,907 |
| 2018 | $404,027 | $173,154 | $577,181 | $7,417 |
| 2017 | $396,105 | $169,759 | $565,864 | $7,233 |
| 2016 | $388,341 | $166,431 | $554,772 | $6,824 |
| 2015 | $382,511 | $163,933 | $546,444 | $6,676 |
| 2014 | $360,500 | $154,500 | $515,000 | $6,118 |
| 2013 | $287,000 | $123,000 | $410,000 | $4,953 |
| 2012 | $280,000 | $120,000 | $400,000 | $4,842 |
| 2010 | $318,500 | $136,500 | $455,000 | $4,999 |
| 2009 | $294,000 | $126,000 | $420,000 | $1,709 |
| 2008 | $64,233 | $42,822 | $107,055 | $1,550 |
| 2007 | $62,974 | $41,982 | $104,956 | $1,474 |
Property facts
Year built
1961
Property type
single_family
Stories
1
Beds
3
Baths
2
Living area
2,014 sqft
Lot size
6,262 sqft
ZIP code
94546
City
Castro Valley
Street
Knoll Way
Coordinates
37.68362, -122.08599
Comparable properties nearby
Frequently asked questions
When did 21661 Knoll Way last sell?
21661 Knoll Way most recently sold on Mar 4, 2009 for $510,000.
What is the current tax assessment for 21661 Knoll Way?
The most recent total assessment for 21661 Knoll Way (year 2025) is $1,275,000 with $15,957 in property tax.
How does 21661 Knoll Way's assessment compare to its last sale price?
The current assessment is 150.0% above the last sale price of $510,000.
When was 21661 Knoll Way built?
21661 Knoll Way was built in 1961.
How does 21661 Knoll Way compare to others on Knoll Way?
We track 5 other properties on Knoll Way. Browse the list under "Other properties on Knoll Way" to compare beds, baths, and sale history.
What are the property facts for 21661 Knoll Way?
21661 Knoll Way is a 3 bed, 2 bath, 2,014 sqft, 6,262 sqft lot single_family.
Is 21661 Knoll Way a flip candidate?
No — 21661 Knoll Way does not appear in our flips dataset.
Is 21661 Knoll Way a tax-appeal candidate?
No — 21661 Knoll Way 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
Other properties on Knoll Way