3521 Keystone Loop
Discovery Bay, CA 94505
5 bd 4 ba 4,088 sqft Built 2003 Lot 6,500 sqft single_family
Most recent sale
$900,000
Apr 29, 2022
Location
Timeline: Sale, Listing & Tax History
Recorded events
| Date | Event | Price | Source |
|---|---|---|---|
| Apr 29, 2022 | Sold | $900,000 | Public Record |
| Mar 19, 2022 | Listed | $896,000 | MLS #422640414 |
| Aug 6, 2020 | Sold | $700,000 | MLS #40909966 |
| Jun 26, 2020 | Listed | $644,950 | MLS #40909966 |
| Nov 22, 2019 | Sold | $585,000 | Public Record |
| Nov 12, 2010 | Sold | $440,000 | Public Record |
| May 10, 2004 | Sold | $525,000 | Public Record |
Tax assessment history
| Year | Building | Land | Total assessed | Tax paid |
|---|---|---|---|---|
| 2025 | $654,111 | $186,889 | $841,000 | $11,404 |
| 2024 | $654,111 | $186,889 | $841,000 | $11,070 |
| 2023 | $651,000 | $186,000 | $837,000 | $11,036 |
| 2022 | $612,000 | $102,000 | $714,000 | $9,694 |
| 2021 | $600,000 | $100,000 | $700,000 | $9,466 |
| 2020 | $475,000 | $150,000 | $625,000 | $8,687 |
| 2019 | $397,954 | $25,837 | $423,791 | $6,491 |
| 2018 | $390,151 | $25,331 | $415,482 | $6,238 |
| 2017 | $382,501 | $24,835 | $407,336 | $6,104 |
| 2016 | $375,001 | $24,349 | $399,350 | $5,767 |
| 2015 | $369,369 | $23,984 | $393,353 | $5,609 |
| 2014 | $362,134 | $23,515 | $385,649 | $5,504 |
| 2013 | $360,498 | $23,409 | $383,907 | $5,458 |
| 2012 | $320,677 | $20,823 | $341,500 | $4,987 |
| 2011 | $417,500 | $22,500 | $440,000 | $5,276 |
| 2010 | $297,377 | $69,123 | $366,500 | $5,150 |
| 2009 | $297,782 | $69,218 | $367,000 | $5,089 |
| 2008 | $408,943 | $95,057 | $504,000 | $6,687 |
| 2007 | $451,968 | $105,058 | $557,026 | $7,163 |
Property facts
Year built
2003
Property type
single_family
Stories
2
Beds
5
Baths
4
Living area
4,088 sqft
Lot size
6,500 sqft
ZIP code
94505
City
Discovery Bay
Street
Keystone Loop
Coordinates
37.91343, -121.61530
Comparable properties nearby
Investment analysis
Estimates based on local averages — not personalized adviceEstimated monthly rent
$5,400
Gross rental yield
7.20%
Implied cap rate
4.68%
Trend-extrapolated value
—
Frequently asked questions
When did 3521 Keystone Loop last sell?
3521 Keystone Loop most recently sold on Apr 29, 2022 for $900,000.
What is the current tax assessment for 3521 Keystone Loop?
The most recent total assessment for 3521 Keystone Loop (year 2025) is $841,000 with $11,404 in property tax.
How does 3521 Keystone Loop's assessment compare to its last sale price?
The current assessment is 6.6% below the last sale price of $900,000.
When was 3521 Keystone Loop built?
3521 Keystone Loop was built in 2003.
How does 3521 Keystone Loop compare to others on Keystone Loop?
We track 8 other properties on Keystone Loop. Browse the list under "Other properties on Keystone Loop" to compare beds, baths, and sale history.
What are the property facts for 3521 Keystone Loop?
3521 Keystone Loop is a 5 bed, 4 bath, 4,088 sqft, 6,500 sqft lot single_family.
Is 3521 Keystone Loop a flip candidate?
Yes — 3521 Keystone Loop appears in our flips dataset, indicating it sold twice within a short window with a notable price change.
Is 3521 Keystone Loop a tax-appeal candidate?
No — 3521 Keystone Loop is not currently flagged as a tax-appeal candidate.
Forecast for this area
ZIP-area linear projection — not a per-property automated valuationQuarterly trend
+1.9%
Implied 1-yr
+7.4%
2026 Q3
$1.04M
2026 Q4
$1.06M
ZIP 94505 — Median Price History + Forecast
Explore nearby
Geography
Other properties on Keystone Loop