21 Unionstone Dr
San Rafael, CA 94903
4 bd 2 ba 1,748 sqft Built 1960 Lot 8,276 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 | $580,283 | $556,389 | $1,136,672 | $16,677 |
| 2024 | $580,283 | $556,389 | $1,136,672 | $16,192 |
| 2023 | $557,751 | $534,785 | $1,092,536 | $16,113 |
| 2022 | $546,816 | $524,300 | $1,071,116 | $15,460 |
| 2021 | $536,096 | $514,022 | $1,050,118 | $14,757 |
| 2020 | $530,604 | $508,755 | $1,039,359 | $14,733 |
| 2019 | $520,200 | $498,780 | $1,018,980 | $14,242 |
| 2018 | $221,957 | $184,405 | $406,362 | $17,465 |
| 2017 | $81,320 | $35,901 | $117,221 | $3,168 |
| 2016 | $79,725 | $35,197 | $114,922 | $3,072 |
| 2015 | $78,528 | $34,669 | $113,197 | $2,930 |
| 2014 | $76,990 | $33,990 | $110,980 | $2,720 |
| 2013 | $76,642 | $33,836 | $110,478 | $2,702 |
| 2012 | $75,140 | $33,173 | $108,313 | $2,655 |
| 2010 | $73,667 | $32,522 | $106,189 | $2,361 |
| 2009 | $73,116 | $32,280 | $105,396 | $2,220 |
| 2008 | $71,853 | $31,722 | $103,575 | $2,359 |
| 2006 | $70,445 | $31,100 | $101,545 | $2,242 |
Property facts
Year built
1960
Property type
single_family
Stories
1
Beds
4
Baths
2
Living area
1,748 sqft
Lot size
8,276 sqft
ZIP code
94903
City
San Rafael
Street
Unionstone Dr
Coordinates
38.03920, -122.54679
Comparable properties nearby
Block-level micro-comps
Same street, ±3 house numbers, sold in the last 24 monthsFrequently asked questions
When did 21 Unionstone Dr last sell?
No public-record sale is on file for 21 Unionstone Dr.
What is the current tax assessment for 21 Unionstone Dr?
The most recent total assessment for 21 Unionstone Dr (year 2025) is $1,136,672 with $16,677 in property tax.
When was 21 Unionstone Dr built?
21 Unionstone Dr was built in 1960.
How does 21 Unionstone Dr compare to others on Unionstone Dr?
We track 5 other properties on Unionstone Dr. Browse the list under "Other properties on Unionstone Dr" to compare beds, baths, and sale history.
What are the property facts for 21 Unionstone Dr?
21 Unionstone Dr is a 4 bed, 2 bath, 1,748 sqft, 8,276 sqft lot single_family.
Is 21 Unionstone Dr a flip candidate?
No — 21 Unionstone Dr does not appear in our flips dataset.
Is 21 Unionstone Dr a tax-appeal candidate?
No — 21 Unionstone 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
-2.9%
Implied 1-yr
-11.4%
2026 Q3
$861.3K
2026 Q4
$861.3K
ZIP 94903 — Median Price History + Forecast
Explore nearby
Geography
Other properties on Unionstone Dr