$2,800,000
PENDING $295K PRICE DROP

523 E Putnam Ave Unit B Cos Cob, CT 06807

Cos Cob Neighborhood

Estimated payment $19,931/month

Total Views 126,296
3 Beds
3.5 Baths
3,251 Sq Ft
$861 Price per Sq Ft

Highlights

  • Waterfront
  • Wood Flooring
  • High Ceiling
  • Cos Cob School Rated A
  • 2 Fireplaces
  • Mud Room

About This Home

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.

Listing Agent

Allen Vetrosky

BHHS New England Properties License #RES.0797681 Listed on: 04/29/2025

BHHS New England Properties

Townhouse Details

Home Type

  • Townhome

Est. Annual Taxes

  • $18,422

Year Built

  • Built in 2009

HOA Fees

  • $3,066 Monthly HOA Fees

Parking

  • 3 Car Garage
  • Tuck Under Garage
  • Automatic Garage Door Opener
  • Garage Door Opener

Home Design

  • Clapboard

Interior Spaces

  • 3,251 Sq Ft Home
  • Elevator
  • Coffered Ceiling
  • High Ceiling
  • 2 Fireplaces
  • Double Pane Windows
  • French Doors
  • Mud Room
  • Formal Entry
  • Formal Dining Room
  • Wood Flooring
  • Water Views
  • Walk-Out Basement

Kitchen

  • Eat-In Kitchen
  • Butlers Pantry

Bedrooms and Bathrooms

  • 3 Bedrooms
  • Walk-In Closet

Laundry

  • Laundry Room
  • Washer and Dryer

Utilities

  • Central Air
  • Heating System Uses Gas
  • Heating System Uses Natural Gas
  • Hydro-Air Heating System
  • Gas Available
  • Gas Water Heater

Additional Features

  • Balcony
  • Waterfront

Listing and Financial Details

  • Assessor Parcel Number 08A-2021/S

Community Details

Overview

  • Association fees include trash, snow removal, grounds care
  • Harbor House Association

Pet Policy

  • Pets Allowed

Townhouse Details

Home Type

Townhome

Est. Annual Taxes

$18,422

Year Built

Built in 2009

Lot Details

0

HOA Fees

$3,066 per month

Parking

3

Listing Details

  • Condo Co-Op Fee: 3066.0
  • Co-Op Heat Included: No
  • Co-Op Water Included: No
  • Directions: Route 1. Driveway between Nordic Custom Builders and Diamond Hill United Methodist Church. Sign at front of driveway labeled Harbor House.
  • Prop. Type: Residential
  • Year Built: 2009
  • Property Sub Type: Condominium
  • Inclusions: Washer/Dryer, All Kitchen Applncs
  • Architectural Style: Townhouse
  • Garage Yn: Yes
  • Cooling System:Central AC: Yes
  • Included:WasherDryer: Yes
  • Features:Balcony: Yes
  • Features:Elevator2: Yes
  • Entry Hall Ceilings:Extra Height: Yes
  • Entry Hall Ceilings:Double Height: Yes
  • Entry Hall Comments:Grand Entrance: Yes
  • Lot Description:Backlot: Yes
  • Tax Misc Info Association Fee: 3066.0
  • Tax Misc Info Association Fee Frequency: Monthly
  • Pets Allowed Allowed: Yes
  • Entry Hall LevelFP 1st37: 1
  • Special Features: None

Interior Features

  • Has Basement: Walkout
  • Full Bathrooms: 3
  • Half Bathrooms: 1
  • Total Bedrooms: 3
  • Fireplaces: 2
  • Fireplace: Yes
  • Interior Amenities: Eat-in Kitchen, Elevator
  • Window Features: Double Pane Windows
  • Primary Bdrm Ceilings:Extra Height9: Yes
  • Primary Bdrm Comments:Walk-in Closet(s): Yes
  • Primary Bth Comments:Luxury Bath: Yes
  • Laundry Comments:Separate Room: Yes
  • Living Room LevelFP:FP2: 1
  • Living Room Comments:French Doors: Yes
  • Kitchen Comments:Eat-In Kitchen: Yes
  • Entry Hall Comments:Hardwood Floor: Yes
  • Other Room LevelFP 2:LL50: 1
  • Dining Room Comments:Formal: Yes
  • Roof Other: Yes
  • Living Room Ceilings:Extra Height2: Yes
  • Dining Room Ceilings:Extra Height4: Yes
  • Kitchen Ceilings:Extra Height8: Yes
  • Basement Type:Walkout: Yes
  • Other Room Comments:Mudroom: Yes
  • Primary Bth Ceilings:Extra Height10: Yes
  • Dbl Bdrms Ceilings:Extra Height16: Yes
  • LibraryDen Comments:French Doors4: Yes
  • LibraryDen Ceilings:Extra Height5: Yes
  • Other Room Ceilings:Extra Height13: Yes
  • Other Room Comments:Butler_squote_s Pantry: Yes
  • Dining Room Ceilings:Coffered4: Yes
  • Living Room LevelFP 1st38: 1
  • Dining Room LevelFP 1st39: 1
  • Powder Room LevelFP 1st42: 1
  • Kitchen LevelFP 1st43: 1
  • Laundry LevelFP 2nd53: 1
  • LibraryDen LevelFP 1st40: 1
  • Primary Bdrm LevelFP 1st44: 1
  • Primary Bath LevelFP 1st45: 2
  • Laundry LevelFP 1st53: 1

Exterior Features

  • Roof: Other
  • Lot Features: Backlot
  • Pool Private: No
  • Waterfront Features: Waterviews
  • Waterfront: Yes
  • Construction Type: Clapboard
  • Exterior Features: Balcony
  • Exterior:Clapboard: Yes
  • Waterfront Descrip:Waterviews: Yes
  • Features:Double Pane Windows: Yes

Garage/Parking

  • Attached Garage: No
  • Garage Spaces: 3.0
  • Parking Features: Garage Door Opener
  • General Property Info:Garage Desc: Under
  • Features:Auto Garage Door: Yes

Utilities

  • Water Source: Public
  • Cooling: Central A/C
  • Laundry Features: Laundry Room
  • Cooling Y N: Yes
  • Heating: See Remarks, Hydro-Air, Natural Gas
  • Heating Yn: Yes
  • Sewer: Public Sewer
  • Heat Fuel:Gas: Yes
  • Water Source:Public: Yes
  • Sanitation Source:Town Sewer: Yes
  • Hot Water:Gas2: Yes
  • Gas Source:Public Utility: Yes
  • Heat System:Hydro-Air: Yes

Condo/Co-op/Association

  • Amenities: No Amenities
  • Association Fee: 3066.0
  • Association Fee Frequency: Monthly
  • Association: Harbor House
  • Association: Yes

Association/Amenities

  • Common Amenities:No Amenities: Yes

Fee Information

  • Association Fee Includes: Trash, Snow Removal, Grounds Care

Schools

  • Elementary School: Cos Cob
  • Middle Or Junior School: Central

Lot Info

  • Zoning: R-7
  • Parcel #: 08A-2021/S

Tax Info

  • Tax Annual Amount: 18422.07

Map

Range of Values:

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Home Values in the Area

Source: Public Records

Average Home Value in this Area





Source: Public Records

Tax History

Year Tax Paid Tax Assessment Tax Assessment Total Assessment is a certain percentage of the fair market value that is determined by local assessors to be the total taxable value of land and additions on the property. Land Improvement
2025 $18,422 $1,490,580 $0 $1,490,580
2024 $17,792 $1,490,580 $0 $1,490,580
2023 $17,344 $1,490,580 $0 $1,490,580
2022 $17,186 $1,490,580 $0 $1,490,580
2021 $19,829 $1,646,960 $0 $1,646,960
2020 $19,796 $1,646,960 $0 $1,646,960
2019 $19,994 $1,646,960 $0 $1,646,960
2018 $20,373 $1,646,960 $0 $1,646,960
Source: Public Records

Property History

Date Event Price Change Sq Ft Price
08/08/2025 08/08/25 Pending -- -- --
07/01/2025 07/01/25 For Rent $14,000 0.0% --
05/30/2025 05/30/25 Price Changed $2,800,000 -9.5% $861 / Sq Ft
04/29/2025 04/29/25 For Sale $3,095,000 0.0% $952 / Sq Ft
05/17/2024 05/17/24 Rented $14,000 0.0% --
05/15/2024 05/15/24 Under Contract -- -- --
05/13/2024 05/13/24 For Rent $14,000 +7.7% --
03/27/2023 03/27/23 Rented $13,000 -7.1% --
03/24/2023 03/24/23 Under Contract -- -- --
02/15/2023 02/15/23 For Rent $14,000 +16.7% --
10/29/2020 10/29/20 Rented $12,000 +9.1% --
10/29/2020 10/29/20 Under Contract -- -- --
08/07/2020 08/07/20 For Rent $11,000 -- --
Source: Greenwich Association of REALTORS®

Purchase History

Date Type Sale Price Title Company
Warranty Deed $2,250,000 None Available
Source: Public Records

Mortgage History

Date Status Loan Amount Loan Type
Open $1,575,000 Purchase Money Mortgage
Previous Owner $1,400,000 Credit Line Revolving
Source: Public Records

About the Listing Agent

Allen Vetrosky

BHHS New England Properties

(203) 760-0446

Section Image

With over a decade of experience as a Realtor, I bring a unique blend of financial acumen and local expertise to every transaction. My 12-year career in finance equipped me with sharp analytical skills and a deep understanding of market trends, allowing me to provide unparalleled insights to my clients.

Since 2012, I've been an active member of the Old Greenwich community, where I live with my wife and three children. This personal connection to the area fuels my passion for helping

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    • 3.5 Baths
    • 3,251 Sq Ft
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    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

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  • 523 E Putnam Ave Unit B, Cos Cob, CT 06807

    $14,000

    • 3 Beds
    • 4.5 Baths
    • 3,251 Sq Ft
    • 523 E Putnam Ave
    • Unit B
    • Cos Cob, CT

    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

    Allen Vetrosky BHHS New England Properties

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Source: Greenwich Association of REALTORS®

MLS Number: 122613

Greenwich Association of REALTORS®

APN: 08A-2021/S