
523 E Putnam Ave Unit B Cos Cob, CT 06807
Cos Cob NeighborhoodEstimated payment $19,931/month
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.
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
Map
Home Values in the Area
Average Home Value in this Area
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 |
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 | -- | -- |
Purchase History
Date | Type | Sale Price | Title Company |
---|---|---|---|
Warranty Deed | $2,250,000 | None Available |
Mortgage History
Date | Status | Loan Amount | Loan Type |
---|---|---|---|
Open | $1,575,000 | Purchase Money Mortgage | |
Previous Owner | $1,400,000 | Credit Line Revolving |
About the Listing Agent

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
Allen's Other Listings
Source: Greenwich Association of REALTORS®
MLS Number: 122613

APN: 08A-2021/S
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