525 E Putnam Ave, Cos Cob, CT 06830
OFF MARKET

525 E Putnam Ave
Cos Cob, CT 06830

Cos Cob
  • Studio
  • 4,057 sqft

$3,928,900

Trulia Estimate
as of Aug 14, 2026
Est. Refi. Payment $25,827/mo*
Refinance Your Home

$3,928,900

Trulia Estimate
as of Aug 14, 2026
Est. Refi. Payment $25,827/mo*
Refinance Your Home
Studio
4,057 sqft

Home Value

Trulia Estimate
$3.93M
Since last month
Decreased$11K (-0.3%)
Since last year
Increased$221K (+5.9%)
Since last sale
Increased$2M (+146%)
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
August 2026$3.94M
July 2026$4.02M
June 2026$3.95M
May 2026$3.97M
April 2026$3.88M
March 2026$3.97M
February 2026$3.93M
January 2026$3.71M
2025

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
24 Rippowam Rd, Cos Cob, CT
0.29
Single-Family Home
$1,595,000
08/22/25
4
2.5
3,827
24 Valley Rd, Cos Cob, CT
0.16
Single-Family Home
$2,400,000
02/25/26
4
4.5
3,221
34 1/2 Orchard St, Cos Cob, CT
0.25
Single-Family Home
$2,022,000
06/22/26
4
2.5
2,126
3 Finney Knoll Ln, Riverside, CT
0.31
Single-Family Home
$3,150,000
12/19/25
4
3.5
4,600
23 Westview Pl, Riverside, CT
0.31
Single-Family Home
$2,250,000
04/03/26
4
3.5
2,641
39 Riverside Ave, Riverside, CT
0.37
Single-Family Home
$1,995,000
10/21/25
5
4.5
2,775
8 River Ln, Cos Cob, CT
0.17
Single-Family Home
$1,400,000
03/19/26
2
2
1,666
36 Cary Rd, Riverside, CT
0.33
Single-Family Home
$1,850,000
10/15/25
4
4
2,400
48 Meyer Pl, Riverside, CT
0.44
Single-Family Home
$1,975,000
03/06/26
5
4
3,260
42 Mead Ave, Greenwich, CT
0.34
Single-Family Home
$1,125,000
11/21/25
3
2
1,833

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
0.03
$5,792,500
3
3.5
4,898
Off Market
523 E Putnam Ave #PENTHOUSE, Cos Cob, CT 06807
0.03
$4,143,600
3
3.5
4,347
Off Market
523 E Putnam Ave #B, Cos Cob, CT 06807
0.03
$2,711,400
3
3.5
3,251
Off Market
523 East Putnam Avenue #B, Greenwich, CT 06830
0.04
$2,711,400
3
3.5
3,251
Off Market
6 Nassau Pl #4, Greenwich, CT 06807
0.04
$922,400
3
1.5
1,554
Off Market
519 E Putnam Avenue, Cos Cob, CT 06807
0.04
$1,990,200
5
3
2,992
Off Market
47 Valley Rd #B3, Cos Cob, CT 06807
0.08
$465,500
2
0.5
800
Recently Sold
89 River Rd #305, Cos Cob, CT 06807
0.11
$1,665,600
2
2
1,230
Off Market
89 River Rd #201, Cos Cob, CT 06807
0.11
$1,714,300
2
2
1,240
Off Market
89 River Rd #303, Cos Cob, CT 06807
0.11
$1,518,400
2
2
1,184
Off Market
115 River Rd #7, Greenwich, CT 06807
0.10
$1,625,000
3
2.5
2,185
Recently Sold
115 River Rd #12, Greenwich, CT 06807
0.10
$1,704,200
3
2.5
1,926
Off Market

Local Information

  • Map ViewExplore the area around 525 E Putnam Ave.
-- mins to
Commute Destination

Home Highlights

Property Type
Single-Family Home
Year Built
1945
Living Area
4,057 sqft
Price/Sqft
$968
Parking
Garage

About this House

This single-family home is located at 525 E Putnam Ave, Cos Cob, CT. 525 E Putnam Ave is in the Cos Cob neighborhood in Cos Cob, CT and in ZIP code 06830. This property has approximately 4,057 sqft of floor space. This property has a lot size of 9583 sqft and was built in 1945.
525 E Putnam Ave, Cos Cob, CT 06830 is a studio, 4,057 sqft single-family home in Cos Cob, built in 1945. It last sold for $1,600,000 on Feb 9, 2009. It is currently off market. The Trulia Estimate is $3,928,900, with a rent estimate of $7,968/month.

Home Details for 525 E Putnam Ave

Interior Features

Interior Details
BasementNumber of Rooms: 4
Levels, Entrance, & Accessibility
Stories: 3

Exterior Features

Exterior Home Features
Roof: Shake ShingleDeck
Parking & Garage
GarageParking: Garage Detached

Property Information

Year Built
Year Built: 1945
Property Type / Style
Property Type: Single Family Home

Community

Units in Building: 2

Lot Information

Lot Area: 9583 sqft

Price and Tax history

DateEventPrice
Feb 9, 2009
Source: N/A
Sold
$1,600,000
Apr 27, 1998
Source: N/A
Sold
$15,000

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
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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

Apartments for Rent

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Explore by feature - Pet Friendly

47 pet-friendly rentals in Cos Cob, CT

Explore by feature - Garage

66 rentals with a garage in Cos Cob, CT

Explore by feature - Air Conditioning

142 rentals with air conditioning in Cos Cob, CT

Explore by feature - Pool

17 rentals with a pool in Cos Cob, CT

Explore by feature - Washer/dryer

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

Explore by feature - Outdoor Space

27 rentals with an outdoor space in Cos Cob, CT

Homes for sale near 525 E Putnam Ave

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Off Market Homes Near 525 E Putnam Ave

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Frequently asked questions about 525 E Putnam Ave

  • What is 525 E Putnam Ave estimated to be worth?
    Trulia's estimated value for 525 E Putnam Ave in Cos Cob, CT is $3,928,900.
  • What is the price history for 525 E Putnam Ave?
    525 E Putnam Ave in Cos Cob, CT last sold for $1,600,000 in February 2009.
  • 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.
  • How big is the lot at 525 E Putnam Ave?
    The lot at 525 E Putnam Ave in Cos Cob, CT is about 0.22 acres (9,583 sq ft).
  • Does 525 E Putnam Ave have a garage?
    Yes, 525 E Putnam Ave in Cos Cob, CT has a garage.