647 River Rd
Cos Cob, CT 06807
5 bd 7 ba 5,929 sqft Built 2015 Lot 49,223 sqft single_family
No recorded sales
Location
Timeline: Sale, Listing & Tax History
Recorded events
| Date | Event | Price | Source |
|---|---|---|---|
| May 6, 2022 | Sold | $4,200,000 | Public Record |
| Dec 6, 2021 | Sold | $3,600,000 | SMARTMLS |
| Apr 22, 2021 | Listed | $3,750,000 | Greenwich |
| Jun 23, 2020 | Listed | $3,695,000 | Greenwich |
| Sep 23, 2015 | Sold | $3,300,000 | Public Record |
| Sep 10, 2015 | Listing removed | $3,400,000 | Greenwich |
| Aug 26, 2015 | Listing removed | $3,400,000 | SMARTMLS |
| Aug 13, 2015 | Price changed | $3,400,000 | SMARTMLS |
| Aug 7, 2015 | Price changed | $3,400,000 | Greenwich |
| May 18, 2015 | Listed | $3,500,000 | Greenwich |
| May 1, 2015 | Listed | $3,500,000 | SMARTMLS |
| Nov 13, 2013 | Listing removed | $679,000 | SMARTMLS |
| Jul 22, 2013 | Price changed | $699,000 | SMARTMLS |
| May 6, 2013 | Price changed | $1,700,000 | SMARTMLS |
| Feb 27, 2013 | Price changed | $1,950,000 | SMARTMLS |
| Oct 27, 2011 | Listed | $2,100,000 | SMARTMLS |
Tax assessment history
| Year | Building | Land | Total assessed | Tax paid |
|---|---|---|---|---|
| 2025 | $1,829,660 | $758,450 | $2,588,110 | $31,986 |
| 2023 | $1,829,660 | $758,450 | $2,588,110 | $30,115 |
| 2022 | $1,829,660 | $758,450 | $2,588,110 | $29,841 |
| 2021 | $1,738,800 | $650,090 | $2,388,890 | $28,762 |
| 2020 | $1,738,800 | $650,090 | $2,388,890 | $28,714 |
| 2019 | $1,738,800 | $650,090 | $2,388,890 | $29,001 |
| 2018 | $1,738,800 | $650,090 | $2,388,890 | $28,356 |
| 2017 | $1,738,800 | $650,090 | $2,388,890 | $28,712 |
| 2016 | $1,708,700 | $646,520 | $2,355,220 | $27,860 |
| 2015 | — | $615,720 | $615,720 | $7,304 |
| 2013 | — | $615,720 | $615,720 | $6,964 |
| 2006 | — | $1,860,110 | $1,860,110 | $14,602 |
| 2004 | — | $782,110 | $782,110 | $8,697 |
| 2003 | — | $782,110 | $782,110 | $8,408 |
Property facts
Year built
2015
Property type
single_family
Stories
2
Beds
5
Baths
7
Living area
5,929 sqft
Lot size
49,223 sqft
ZIP code
06807
City
Cos Cob
Street
River Rd
Coordinates
41.06664, -73.57787
Comparable properties nearby
Frequently asked questions
When did 647 River Rd last sell?
No public-record sale is on file for 647 River Rd.
What is the current tax assessment for 647 River Rd?
The most recent total assessment for 647 River Rd (year 2025) is $2,588,110 with $31,986 in property tax.
When was 647 River Rd built?
647 River Rd was built in 2015.
How does 647 River Rd compare to others on River Rd?
We track 8 other properties on River Rd. Browse the list under "Other properties on River Rd" to compare beds, baths, and sale history.
What are the property facts for 647 River Rd?
647 River Rd is a 5 bed, 7 bath, 5,929 sqft, 49,223 sqft lot single_family.
Is 647 River Rd a flip candidate?
No — 647 River Rd does not appear in our flips dataset.
Is 647 River Rd a tax-appeal candidate?
No — 647 River Rd 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 Rd