523 E Putnam Ave #B, Cos Cob, CT 06807
Property image
Property image
OFF MARKET

$2,735,200

Trulia Estimate
  • 3 Beds
  • 3.5 Baths
  • 3,251 sqft

523 E Putnam Ave #B, Cos Cob, CT 06807

Cos Cob
Est. Refi. Payment $18,309/mo*
Refinance Your Home
Currently Off Market - Sold Sep 9, 2025 for $2,550,000

Home Value

Trulia Estimate
$2.73M
Since last month
Decreased$2K (-0.1%)
Since last year
Increased$179K (+7%)
Since last sale
Increased$191K (+7.5%)
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 +27% in the last 10 years
MonthEstimated value
2026
September 2026$2.74M
August 2026$2.74M
July 2026$2.71M
June 2026$2.7M
May 2026$2.67M
April 2026$2.62M
March 2026$2.61M
February 2026$2.62M
January 2026$2.57M
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
115 River Rd #7, Greenwich, CT
0.11
Condo
$1,625,000
05/06/26
3
2.5
2,185
24 Harold St #E, Cos Cob, CT
0.22
Condo
$1,660,000
03/09/26
4
3.5
2,736
44 Valley Rd #A, Cos Cob, CT
0.22
Condo
$1,580,000
11/21/25
4
3.5
2,632
453 E Putnam Ave #4B, Cos Cob, CT
0.09
Condo
$850,000
05/20/26
2
2.5
1,464
453 East Putnam Avenue #4B, Greenwich, CT
0.11
Condo
$850,000
05/20/26
2
2.5
1,464
24 Decatur St #2, Cos Cob, CT
0.32
Condo
$850,000
07/06/26
2
2.5
1,643
98 Valley Rd #12, Cos Cob, CT
0.29
Condo
$960,000
06/15/26
3
1.5
1,240
6 Caroline Farms Road #4, Greenwich, CT
0.56
Condo
$1,190,000
07/17/26
2
3.5
2,042
9 River Rd #418, Greenwich, CT
0.52
Condo
$855,000
07/01/26
2
2.5
1,181
58 Stirrup Ln, Riverside, CT
0.89
Condo
$1,234,567
06/15/26
3
2.5
1,992

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
523 East Putnam Avenue #PH, Greenwich, CT 06830
0.01
$6,029,800
3
3.5
4,898
Off Market
523 E Putnam Ave #PENTHOUSE, Cos Cob, CT 06807
0.00
$4,409,200
3
3.5
4,347
Off Market
523 East Putnam Avenue #B, Greenwich, CT 06830
0.01
$2,735,200
3
3.5
3,251
Off Market
6 Nassau Pl #4, Greenwich, CT 06807
0.07
$940,400
3
1.5
1,554
Off Market
519 E Putnam Avenue, Cos Cob, CT 06807
0.06
$2,146,900
5
3
2,992
Off Market
47 Valley Rd #B3, Cos Cob, CT 06807
0.09
$465,500
2
0.5
800
Recently Sold
89 River Rd #305, Cos Cob, CT 06807
0.08
$1,688,800
2
2
1,230
Off Market
89 River Rd #201, Cos Cob, CT 06807
0.08
$1,758,100
2
2
1,240
Off Market
89 River Rd #303, Cos Cob, CT 06807
0.08
$1,536,200
2
2
1,184
Off Market
89 River Rd #304, Cos Cob, CT 06807
0.08
$2,195,000
1
1.5
1,088
For Sale
115 River Rd #7, Greenwich, CT 06807
0.11
$1,625,000
3
2.5
2,185
Recently Sold

Local Information

  • Map ViewExplore the area around 523 E Putnam Ave #B.
  • Schools1 Preschool School1 Elementary School1 Middle School1 High School
  • Shop & Eat
-- mins to
Commute Destination

Home Highlights

Condo
Built in 2009
3,251 sqft
$841/sqft
Garage
HOA $3,066/mo

About this House

What's unique:Outdoor fireplaceHigh ceilingsCoiffured ceilingsCalming water viewsPatio overlooking the riverFamily room
Space and convenience await you at this incredible townhouse with views of the Mianus River and a location close to Old Greenwich, Riverside and Cos Cob. This 3 bedroom, 3.5 bath home has high ceilings throughout, generously sized rooms and picture-perfect outdoor space. With 3 dedicated underground parking spaces and an elevator to take you to your living floor, this is as easy as it gets. The unit (one of only 3 in the building) offers high end finishes: coiffured ceilings, Viking appliances and his/her primary bathrooms & closets. With 3 sets of French doors giving access to outdoor spaces, you are never far from the calming water views of the river below. Gourmet kitchen and family room, as well as dining room, mud room and den flow seamlessly on the main level, along with the luxurious primary suite. The second floor offers 2 more en suite bedrooms. Access to the unit is gained from the main vestibule or from your own front door. And the outdoor fireplace on the patio overlooking the river a great place to end the day. 523 E Putnam B is not to be missed for those looking for easy living close to everything.
523 E Putnam Ave #B, Cos Cob, CT 06807 is a 3 bedroom, 4 bathroom, 3,251 sqft condo in Cos Cob, built in 2009. It last sold for $2,550,000 on Sep 9, 2025 (9% below the $2,800,000 asking price). More recently, it was listed as a rental in July 2025 with an asking price of $14,000 per month. That rental listing was removed on September 2, 2025. This property is not currently displayed as for sale or rent on Trulia. The Trulia Estimate is $2,735,200.
Last check for updates: about 6 hours ago
Listed by Allen Vetrosky, (203) 981-8793
BHHS New England Properties
Bought with: Stacey Delikat, (203) 249-4595, Houlihan Lawrence
Source: Greenwich MLS, Inc., MLS#122613

Home Details for 523 E Putnam Ave #B

Interior Features

Beds & Baths
Number of Bedrooms: 3Number of Bathrooms: 4Number of Bathrooms (full): 3Number of Bathrooms (half): 1
Dimensions and Layout
Living Area: 3251 Square Feet
Appliances & Utilities
Laundry: Laundry Room
Heating & Cooling
Heating: Natural Gas,See Remarks,Hydro-AirHas CoolingAir Conditioning: Central AirHas HeatingHeating Fuel: Natural Gas
Fireplace & Spa
Number of Fireplaces: 2Has a Fireplace
Windows, Doors, Floors & Walls
Window: Double Pane Windows
Levels, Entrance, & Accessibility
Elevator
View
Has a ViewView: Water

Exterior Features

Exterior Home Features
Roof: OtherExterior: BalconyNo Private Pool
Parking & Garage
Number of Garage Spaces: 3Number of Covered Spaces: 3Has a GarageParking Spaces: 3Parking: Garage Door Opener

Property Information

Year Built
Year Built: 2009
Property Type / Style
Property Type: ResidentialProperty Subtype: Residential, Condominium
Building
Construction Materials: Clapboard
Property Information
Included in Sale: Washer/Dryer, All Kitchen ApplncsParcel Number: 08A2021/S

Price & Status

Price
List Price: $2,800,000
Status Change & Dates
Off Market Date: Fri Aug 08 2025

Active Status

MLS Status: Closed

Location

Direction & Address
City: Cos Cob
School Information
Elementary School: Cos CobJr High / Middle School: Central

Building

Building Area
Building Area: 3251 Square Feet

HOA

HOA Fee Includes: Trash, Snow Removal, Maintenance GroundsHOA Name (second): Harbor HouseHas an HOAHOA Fee: $3,066/Monthly

Mobile R/V

Mobile Home Park
Mobile Home Units: Feet

Miscellaneous

BasementMls Number: 122613Water ViewWater View: Water

Additional Information

HOA Amenities: None

Price and Tax history

DateEventPrice
Sep 9, 2025
Source: Greenwich MLS, Inc. #122613
Sold
$2,550,000
Sep 2, 2025
Source: Berkshire Hathaway HomeServices New England Properties
ListingRemoved
$14,000
Aug 8, 2025
Source: Berkshire Hathaway HomeServices New England Properties #122613
Contingent
$2,800,000
Aug 8, 2025
Source: Greenwich MLS, Inc. #122613
Pending
$2,800,000
Jul 1, 2025
Source: Berkshire Hathaway HomeServices New England Properties
Listed For Rent
$14,000

Market trends in Greenwich

Last updated August 2026
Buyer'sMarketSeller'sMarket
Avg. sale price
$2.58M
$150KMoM
Sale-to-List Price
104.8%
1.0%MoM
Price per sq ft
$825
$1MoM
Available listings
152
30MoM

Around this home

Neighborhood Overview

Cos Cob
See Local Highlights
Neighborhood stats provided by third party data sources.

What Locals Say about Cos Cob

At least 1 Trulia users voted on each feature.

  • 100 % Say neighbors are friendly

  • 100 % Say there are community events

  • 100 % Say there's holiday spirit

  • 100 % Say it's walkable to grocery stores

  • 100 % Say it's walkable to restaurants

  • 100 % Say parking is easy

  • 100 % Say car is needed

  • 100 % Say streets are well-lit

  • 100 % Say it's dog friendly

Sourced by Trulia users. Learn more about our methodology.

LGBTQ Local Legal Protections

Listing data courtesy of Greenwich MLS. IDX information is provided exclusively for consumers’ personal, non-commercial use, that it may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Data is deemed reliable but is not guaranteed accurate by the MLS.

Frequently asked questions about 523 E Putnam Ave #B

  • What is 523 E Putnam Ave #B estimated to be worth?
    Trulia's estimated value for 523 E Putnam Ave #B in Cos Cob, CT is $2,735,200.
  • What is the price history for 523 E Putnam Ave #B?
    523 E Putnam Ave #B in Cos Cob, CT last sold for $2,550,000 in September 2025.
  • 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 $2.58M. That is up $150K from the prior month.
  • Does 523 E Putnam Ave #B have air conditioning?
    Yes, 523 E Putnam Ave #B in Cos Cob, CT has air conditioning.
  • Does 523 E Putnam Ave #B have laundry facilities?
    Yes, 523 E Putnam Ave #B in Cos Cob, CT has laundry facilities.

Explore by feature - Pet Friendly

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