12 River Ln
Cos Cob, CT 06807
4 bd 3 ba 2,653 sqft Built 1947 Lot 10,890 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 | $454,230 | $483,980 | $938,210 | $11,595 |
| 2023 | $454,230 | $483,980 | $938,210 | $10,917 |
| 2022 | $454,230 | $483,980 | $938,210 | $10,818 |
| 2021 | $469,420 | $394,380 | $863,800 | $10,400 |
| 2020 | $469,420 | $394,380 | $863,800 | $10,383 |
| 2019 | $469,420 | $394,380 | $863,800 | $10,487 |
| 2018 | $469,420 | $394,380 | $863,800 | $10,253 |
| 2017 | $469,420 | $394,380 | $863,800 | $10,382 |
| 2016 | $469,420 | $394,380 | $863,800 | $10,218 |
| 2015 | $287,420 | $436,870 | $724,290 | $8,592 |
| 2013 | $287,420 | $436,870 | $724,290 | $8,192 |
| 2006 | $351,960 | $599,130 | $951,090 | $7,466 |
| 2004 | $412,020 | $182,560 | $594,580 | $6,939 |
| 2003 | $412,020 | $182,560 | $594,580 | $6,713 |
Property facts
Year built
1947
Property type
single_family
Stories
2
Beds
4
Baths
3
Living area
2,653 sqft
Lot size
10,890 sqft
ZIP code
06807
City
Cos Cob
Street
River Ln
Coordinates
41.03947, -73.59393
Comparable properties nearby
Block-level micro-comps
Same street, ±3 house numbers, sold in the last 24 monthsFrequently asked questions
When did 12 River Ln last sell?
No public-record sale is on file for 12 River Ln.
What is the current tax assessment for 12 River Ln?
The most recent total assessment for 12 River Ln (year 2025) is $938,210 with $11,595 in property tax.
When was 12 River Ln built?
12 River Ln was built in 1947.
How does 12 River Ln compare to others on River Ln?
We track 4 other properties on River Ln. Browse the list under "Other properties on River Ln" to compare beds, baths, and sale history.
What are the property facts for 12 River Ln?
12 River Ln is a 4 bed, 3 bath, 2,653 sqft, 10,890 sqft lot single_family.
Is 12 River Ln a flip candidate?
No — 12 River Ln does not appear in our flips dataset.
Is 12 River Ln a tax-appeal candidate?
No — 12 River Ln is not currently flagged as a tax-appeal candidate.
Forecast for this area
ZIP-area linear projection — not a per-property automated valuationQuarterly trend
+4.5%
Implied 1-yr
+17.8%
2025 Q4
$2.1M
2026 Q1
$2.17M
ZIP 06807 — Median Price History + Forecast
Explore nearby
Geography
Other properties on River Ln