664 River Rd, Cos Cob, CT 06807
OFF MARKET

$2,763,900

Trulia Estimate
  • 4 Beds
  • 4 Baths
  • 4,258 sqft (on 0.50 acres)

664 River Rd, Cos Cob, CT 06807

Est. Refi. Payment $18,235/mo*
Refinance Your Home
Currently Off Market - Sold May 15, 1996 for $175,000

Home Value

Trulia Estimate
$2.76M
Since last month
Increased$32K (+1.2%)
Since last year
Increased$299K (+12.1%)
Since last sale
Increased$3M (+1,477.6%)
Learn more about this home's value by checking out its Trulia Estimate, the value of nearby homes, and how much similar homes have sold for.

Trulia Estimate

The of this home's value increased by +83% in the last 10 years
MonthEstimated value
2026
August 2026$2.76M
August 2026$2.76M
July 2026$2.73M
June 2026$2.72M
May 2026$2.7M
April 2026$2.63M
March 2026$2.64M
February 2026$2.48M
January 2026$2.47M
2025
2024
2023
2022
2021
2020
2019
2018
2017
2016

Comparable sales

These are recently sold homes that have a similar location or other similar features to this home, like bedrooms, bathrooms, and square footage. Get a sense of the expected prices in the area by viewing these homes.
Address
Distance
Property Type
Sold Price
Sold Date
Bed
Bath
Sqft
70 Gregory Rd, Cos Cob, CT
0.28
Single-Family Home
$2,175,000
06/26/26
4
3
3,142
681 River Road, Cos Cob, CT
0.12
Single-Family Home
$2,445,000
07/24/26
4
4.5
3,826
681 River Rd, Cos Cob, CT
0.13
Single-Family Home
$2,445,000
07/24/26
4
4.5
3,826
525 Westover Rd, Stamford, CT
0.44
Single-Family Home
$1,500,000
11/24/25
4
3.5
3,510
98 Hillcrest Park Rd, Cos Cob, CT
0.45
Single-Family Home
$2,610,000
05/29/26
4
3.5
3,298
420 Valley Rd, Cos Cob, CT
0.18
Single-Family Home
$1,300,000
04/14/26
4
2.5
1,601
18 Azalea Ter, Cos Cob, CT
0.28
Single-Family Home
$1,500,000
02/10/26
3
2.5
2,600
75 West Glen Drive, Stamford, CT
0.42
Single-Family Home
$2,250,000
01/09/26
4
4.5
4,884
92 Hillcrest Park Rd, Old Greenwich, CT
0.41
Single-Family Home
$2,950,000
12/15/25
5
3.5
3,339
552 River Rd, Cos Cob, CT
0.54
Single-Family Home
$2,691,500
03/27/26
4
4.5
4,078

Nearby home prices

Get a sense of expected prices in the area by checking the value of nearby homes.
Address
Distance
Price
Bed
Bath
Sqft
Status
681 River Road, Cos Cob, CT 06807
0.12
$2,445,000
4
4.5
3,826
Recently Sold
681 River Rd, Cos Cob, CT 06807
0.13
$2,445,000
4
4.5
3,826
Recently Sold
72 Hillcrest Park Road, Cos Cob, CT 06807
0.11
$4,652,800
5
4.5
4,180
Off Market
50 Hillcrest Park Road, Greenwich, CT 06807
0.11
$4,033,400
6
6
6,062
Off Market
9 Walnut St, Cos Cob, CT 06807
0.12
$1,375,000
3
1
1,482
Recently Sold
93 Hillcrest Park Road, Cos Cob, CT 06807
0.12
$2,757,300
4
3.5
3,576
Off Market
51 Hillcrest Park Road, Cos Cob, CT 06807
0.13
-
6
5
6,213
Off Market
43 Hillcrest Park Road, Cos Cob, CT 06807
0.13
$2,252,100
3
3
2,765
Off Market
41 Hillcrest Park Road, Cos Cob, CT 06807
0.13
$2,305,100
4
3
3,152
Off Market
446 Valley Rd, Cos Cob, CT 06807
0.15
-
2
1.5
2,127
Off Market
7 Chestnut St, Cos Cob, CT 06807
0.15
$2,643,300
5
4.5
4,000
Off Market
42 Mimosa Dr, Cos Cob, CT 06807
0.16
$3,510,200
4
2.5
2,751
Off Market

Local Information

  • Map ViewExplore the area around 664 River Rd.
  • Schools1 Elementary School1 Middle School1 High School
  • Shop & Eat
-- mins to
Commute Destination

Home Highlights

Single-Family Home
Built in 1997
0.5 acre lot
4,258 sqft
$649/sqft
Garage

About this House

This single-family home is located at 664 River Rd, Cos Cob, CT. 664 River Rd is in Cos Cob, CT and in ZIP code 06807. This property has 4 bedrooms, 5 bathrooms and approximately 4,258 sqft of floor space. This property has a lot size of 0.50 acres and was built in 1997.
664 River Rd, Cos Cob, CT 06807 is a 4 bedroom, 5 bathroom, 4,258 sqft single-family home built in 1997. It last sold for $175,000 on May 15, 1996. This property is not currently displayed as for sale or rent on Trulia. The Trulia Estimate is $2,763,900.

Home Details for 664 River Rd

Interior Features

Interior Details
BasementAtticNumber of Rooms: 11Types of Rooms: Walk In Closet, Breakfast Nook, Dining Room, Family Room, Laundry Room, Master Bath, Office, Pantry, Recreation Room, Workshop, Sun RoomWet BarCeiling Fan
Heating & Cooling
Heating: Forced Air, OilAir ConditioningCooling System: CentralHeating Fuel: Forced Air
Levels, Entrance, & Accessibility
Stories: 3Floors: Hardwood
Appliances & Utilities
Cable ReadyDishwasherDisposalDryerMicrowaveRefrigeratorWasher
Fireplace & Spa
FireplaceHot Tub or SpaJetted Bath Tub
Windows, Doors, Floors & Walls
Double Paned Windows
Security
Security System

Exterior Features

Exterior Home Features
Roof: AsphaltDeckExterior: WoodLawnPatioPorchSprinkler System
Parking & Garage
GarageParking Spaces: 5Parking: Garage Attached

Property Information

Year Built
Year Built: 1997Year Updated: 2008
Property Type / Style
Property Type: Single Family HomeArchitecture: Colonial

Community

Units in Building: 1

Lot Information

Lot Area: 0.50 acres

Additional Information

Intercom

Building

Pool
Sauna

Price and Tax history

DateEventPrice
May 15, 1996
Source: N/A
Sold
$175,000

Market trends in Greenwich

Last updated July 2026
Buyer'sMarketSeller'sMarket
Avg. sale price
$2.44M
$338KMoM
Sale-to-List Price
103.8%
1.1%MoM
Price per sq ft
$825
$24MoM
Available listings
182
8MoM

Around this home

What Locals Say about Greenwich

At least 470 Trulia users voted on each feature.

  • 88 % Say it's dog friendly

  • 83 % Say car is needed

  • 77 % Say parking is easy

  • 76 % Say there's holiday spirit

  • 74 % Say people would walk alone at night

  • 73 % Say yards are well-kept

  • 69 % Say kids play outside

  • 67 % Say it's walkable to restaurants

  • 67 % Say they plan to stay for at least 5 years

  • 67 % Say it's quiet

  • 60 % Say there are sidewalks

  • 60 % Say there's wildlife

  • 58 % Say neighbors are friendly

  • 57 % Say streets are well-lit

  • 55 % Say it's walkable to grocery stores

  • 45 % Say there are community events

Sourced by Trulia users. Learn more about our methodology.
  • Trulia User
    "Dog friendly"
    0
    Flag
  • Trulia User
    "Great long walking trails all Over the town, and dog parks! So it is just wonderfully dog friendly. "
    0
    Flag
  • Justine
    "Greenwich car show, dog day out, Bruce museum, proximity to Highway, public beach and pool for Greenwich residents"
    0
    Flag
  • Trulia User
    "School events, country club, cohen civic center, beach, walk-to-town, nice holiday environments, nice neighbors and neighborhoods!"
    0
    Flag
  • Dalvesbrito
    "Block party School Halloween party School movie party Fireworks on 4th of July Center civic events "
    0
    Flag
  • Kellysgreensllc
    "There are good schools,parks,library here. Conveniently located near mass transit.Not to forget our beaches. Local restaurants "
    0
    Flag
  • eiji.nishimuras
    "No good dog park to speak of. And generally park regulation and beach regulation is not very dog friendly "
    0
    Flag
  • Sharon Elkayam
    "It is a friendly community where the kids ride bikes and play together. The schools are good. The kids play in the front yards. "
    0
    Flag
  • Jp
    "It’s the best blend of good suburban town systems and support, and easy access to the center of economic opportunity and culture. "
    0
    Flag
  • Stefanie Lacoff, Realtor
    "Many parks and trails to walk your dog. Dogs are allowed at the beach during winter months. Greenwich is a great place to live! "
    1
    Flag
  • Stefanie Lacoff, Realtor
    "Greenwich is diverse and inclusive. People are educated and parents are involved. We have great amenities and resources for our community. "
    0
    Flag
  • Stefanie Lacoff, Realtor
    "Greenwich is a fantastic town to live in and raise a family. It’s great for all ages from kids through seniors. "
    0
    Flag
  • Jmcdg22m5w
    "It’s a quiet and clean neighborhood, I like it a lot. The restaurants are beautiful, the people are friendly, it is an easily accessible place for pharmacies or clothing and accessories stores."
    0
    Flag
  • Trulia User
    "I’ve lived here 25 years and love it. Looking to stay in the area only need a bigger house with no steps."
    1
    Flag
  • Trulia User
    "Great neighborhood! Love it here just looking for something more private single family home on a dead end or curl de sac."
    2
    Flag
  • Trulia User
    "Very dog friendly. Lots of great places to walk with a dog. Many dog owners. The beach in Old Greenwich is a fun place to meet other dog owners and allow them to play."
    0
    Flag
  • Trulia User
    "I95 is the worst and the Merritt parkway are very difficult to commute on. Good luck if you need to commute during peak times. "
    1
    Flag
  • Sharonelkayam
    "Kid and pet friendly. Nice neighbors and well kept homes. The schools are great. Good area for walking and running. Near trains and shopping area in Old Greenwich. Beach is also a few minutes away."
    1
    Flag
  • Sandra
    "Halloween decoration is the best! Neighbors are very nice and safety, kids walk and play safety school is very good"
    0
    Flag
  • Barbara J.
    "Great public and private schools and safe neighborhoods. People are friendly and it’s a great place to raise kids. "
    5
    Flag
  • Charles M.
    "Pretty perfect. Train, buses, the parkway and 95. What’s left? Car pooling! and we have that as well."
    0
    Flag
  • Janette S. A.
    "Family oriented neighborhood with nice parks and sidewalk restaurants. Feel safe going for a walk and at the park. "
    0
    Flag
  • Diane L.
    "The police involvement with their community, the amazing schools and circular activities, the friendly neighborhood, so many other Positive things to say not enough time!"
    4
    Flag
  • Hercoles_silveir4
    "Grande offers better security public transport schools hospital than any other city that my family and I have ever lived in I think a good place to live would recommend to anyone that I like a safe and educated home"
    1
    Flag
  • Daniel C.
    "I need a car most of the time. There’s 2 buses line that serves the town, one takes you to the metro north station "
    0
    Flag
  • Trevor M.
    "Love living here!! It is beautiful,safe and fun. Tods point is amazing. Great schools and plenty of things to do!"
    0
    Flag
  • Leila
    "The is very. Nice friendly I like to live in Grreewich because is Quite and gentle I can walk to my dog in the nighttime no danger"
    5
    Flag
  • Lynn M.
    "Busy street traffic, leash mandatory , people drive by fast! Dogs being walked are friendly. People pick up their dog waste. It’s a plus!"
    1
    Flag
  • Allforsummer
    "I grew up in Glenville. It’s a very family oriented neighborhood. Local businesses are owned by neighbors. Kids can ride their bikes freely or take walks to Glenville Pizza. Great place to live! "
    0
    Flag
  • Katetaylor83
    "Yes - there are a number of places close by to walk your dogs. It’s not ideal, as there aren’t a lot of off leash options and the dog run is tiny and unusable. "
    3
    Flag
  • Ksziman
    "Strong sense of community and neighborly support and camaraderie. Folks generally look out for one another "
    3
    Flag
  • Stephanie
    "Yes there are lots of dogs. With lots of parks to walk dogs. Anyone who has a dog would be comfort in. "
    0
    Flag
  • Lynn M.
    "My area is not particularly family friendly. I live in the main avenue. Better suited to working person/s."
    2
    Flag
  • Lesliegodner
    "I’ve lived here for a year. It’s a great neighborhood. We have amazing restaurants and stores. Great for families and singles alike. "
    0
    Flag
  • Jesselynn G.
    "The elementary school fairs/carnivals, trick or treating, fireworks at the park nothing else in particular but overall a great neighborhood "
    0
    Flag
  • Mdandola
    "Lots of families in the area and great schools. The town has tons of wonderful programs, and there are great additional programs through YMCA and other organizations in town. The town party is awesome, as well."
    4
    Flag
  • Sarah G.
    "I reverse commute to North Haven—50 mikes away. I have zero traffic and can get to 95 quickly, so that’s a plus. "
    0
    Flag
  • Andrea T.
    "Is very safe has great schools clean streets is near most shops people respect each other I would love rents to be not as expensive forces people to move out "
    0
    Flag
  • Gissella E.
    "Safe area to live. Great school with a exceptional , espectacular kids activities and kids friendly and pleasure to live here and grow up your family. Good , good ,good "
    0
    Flag
  • Debtifrob
    "This community is as close as you can get to a home town like Father Knows Best or Andy Griffin. With. the exception of the high cost, it's a very warm, exclusive neighborhood with mansions & working class ppl. lots of celebrities move here bc if safety & school system. I was born here & living here 65yrs now. Downfall is the high housing, upside lots if culture & a few beaches, public pool & island a ferry brings you to."
    4
    Flag

LGBTQ Local Legal Protections

Frequently asked questions about 664 River Rd

  • What is 664 River Rd estimated to be worth?
    Trulia's estimated value for 664 River Rd in Cos Cob, CT is $2,763,900.
  • What is the price history for 664 River Rd?
    664 River Rd in Cos Cob, CT last sold for $175,000 in May 1996.
  • Is Cos Cob a buyer's or seller's market?
    Cos Cob is currently a seller's market, based on recent for-sale activity.
  • What's the median sale price in Cos Cob?
    The median sale price in Cos Cob is $2.44M. That is up $338K from the prior month.
  • Does 664 River Rd have air conditioning?
    Yes, 664 River Rd in Cos Cob, CT has air conditioning.
  • Does 664 River Rd have laundry facilities?
    Yes, 664 River Rd in Cos Cob, CT has in-unit laundry.

Explore by feature - Pet Friendly

34 pet-friendly rentals in Cos Cob, CT

Explore by feature - Garage

52 rentals with a garage in Cos Cob, CT

Explore by feature - Air Conditioning

114 rentals with air conditioning in Cos Cob, CT

Explore by feature - Pool

18 rentals with a pool in Cos Cob, CT

Explore by feature - Washer/dryer

97 rentals with a washer/dryer in Cos Cob, CT

Explore by feature - Outdoor Space

19 rentals with an outdoor space in Cos Cob, CT

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Off Market Homes Near 664 River Rd

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