Greenwich Town property record for 521 E Putnam Ave, Cos Cob, CT 06807
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 3 ba · 1,450 sqft · built 1977 |
| Lot Size | 0.49 acres (21,344 sqft) |
| Owner | Company Name on Record |
| Tax Bill | $9,388 (2024) |
| Deeds & Mortgages | Jan 2026 Sale |
| Flood Zone | Zone X (minimal risk) |
| APN | 07-2353S |
| Primary APN | 07-2353S |
|---|---|
| Alternative APNs |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 6 Rooms |
| Stories | 1 Story |
| Building Area | 1,450 sqft Living Area |
| Basement Area | 1,404 sqft |
| Unfinished Basement | 1,404 sqft |
| Year Built | Built 1977 |
|---|---|
| Effective Year Built | Effective 1977 |
| Architectural Style | Raised Ranch |
| Exterior Material | Aluminum/Vinyl |
| Construction Type | Frame |
| Roof Type | Gable |
| Roof Material | Asphalt |
| Lot Area | 21,344 sqft (0.49 acres) |
| Pool Type | Spa / Hot Tub (No Pool) |
| Deck Area | Deck Area |
| Cooling System | HVAC |
|---|---|
| Heating System | Hot Water |
| Heating Fuel | Gas |
| Account Number | 342/017 |
|---|---|
| Street Address | 521 E PUTNAM AVE |
| City | COS COB |
| State | CT |
| Zip | 06807-2506 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R-20 |
| Legal Block | 2353/S |
| Jurisdiction | GREENWICH CT |
| Township / Civil Division | GREENWICH |
| Census Block Group | 2 |
| Census Block | 2010 |
| Census Tract | 10201 |
Source: Greenwich Town records, as of June 25, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Company Name on Record |
|---|---|
| Mailing Address | 87 GREENWICH AVE, GREENWICH, CT 06830-5521 |
| Owner Type | Company |
| Vesting | Company |
| Deed Names | Name on Deed |
|---|---|
| Record Updated | Sep 20, 2026 |
| Document Type | Warranty Deed |
|---|---|
| Jurisdiction | GREENWICH CT |
| Recording Date | Jan 20, 2026 |
| Property Address | 521 E PUTNAM AVE, COS COB, CT 06807-2506 |
| Document Number | 008524-306 |
| Book / Page | 8524 / 306 |
| Instrument Date | Dec 23, 2025 |
| Instrument | 366 |
| Transaction Type | Transfer |
| Record Updated | Feb 23, 2026 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | No Consideration Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 87 GREENWICH AVE, GREENWICH, CT 06830-5521 |
Source: Greenwich Town assessment roll, as of June 25, 2026
| Type | Name |
|---|---|
| State | Connecticut |
| County Subdivision | Greenwich Town |
| Unified School District | Greenwich School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $759,710 (-) Land $597,450 Building $162,260 | $531,797 Land $418,215 Building $113,582 | |
| 2024 | $9,388.00 (+6.2%) | ||
| 2023 | $8,840.00 (+0.92%) | $759,710 (-) Land $597,450 Building $162,260 | |
| 2022 | $8,759.00 | $759,710 Land $597,450 Building $162,260 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
Source: FEMA National Flood Hazard Layer, effective November 28, 2025
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 96% of the US · lower than 94% of Connecticut |
|---|---|
| Wildfire Likelihood | Under 0.01% annual chance |
| Exposure | None beyond ember reach |
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
Source: EPA Safe Drinking Water Information System, as of September 2026
| Water System | AQUARION-EASTERN FAIRFIELD COUNTY private · serves 351,756 people · EPA ID CT0150011 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Jun 2025 |
| Lead | Under 1 ppb (2026) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | 24 last 3 years |
Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes.
Source: FCC Broadband Data Collection, based on 328 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Optimum Fiber · Cable | 8,000 / 8,000 |
| Verizon Fiber · Fixed Wireless in parts of the area | 980 / 880 |
| Starlink Satellite | 280 / 30 |
May also be available: Frontier.
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