Greenwich Town property record for 391 E Putnam Ave, Cos Cob, CT 06807
| Property Type | Mixed Use Commercial Office / Residential |
|---|---|
| Details | 6 bd · 3 ba · 3,901 sqft · built 1869 |
| Lot Size | 0.53 acres (23,087 sqft) |
| Owner | Company Name on Record |
| Last Sale | $2,200,000 (Aug 2011) |
| Tax Bill | $21,727 (2025) |
| Flood Zone | Zone AE (high risk) |
| APN | 08-2405S |
| Primary APN | 08-2405S |
|---|---|
| Alternative APNs |
|
| Bedrooms | 6 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 13 Rooms |
| Units | 3 Units |
| Stories | 3 Stories |
| Building Area | 3,901 sqft Total Area |
| Basement Area | 1,827 sqft |
| Unfinished Basement | 1,827 sqft |
| Year Built | Built 1869 |
|---|---|
| Effective Year Built | Effective 1960 |
| Construction Type | Frame |
| Roof Type | Gable |
| Roof Material | Shingle |
| Lot Area | 23,087 sqft (0.53 acres) |
| Deck Area | Deck Area |
| Cooling System | HVAC |
|---|---|
| Heating System | Forced Air with A/C |
| Account Number | 366/201 |
|---|---|
| Street Address | 391 E PUTNAM AVE |
| City | COS COB |
| State | CT |
| Zip | 06807-2581 |
| Property Category | Commercial |
| Property Type | Commercial > Office > Mixed Use Commercial Office / Residential |
| Local Zoning Code | LB |
| Legal Subdivision | EAST SHORE |
| Legal Block | 2405/S |
| Jurisdiction | GREENWICH CT |
| Township / Civil Division | GREENWICH |
| Census Block Group | 1 |
| Census Block | 1004 |
| Census Tract | 10800 |
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 | 391 E PUTNAM AVE, GREENWICH, CT 06830-4810 |
| Owner Type | Company |
| Vesting | Company |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Aug 15, 2011 · Amount on Record |
| Deed Sale | Aug 15, 2011 · Amount on Record |
| Prior Sale | Oct 14, 1998 · Amount on Record |
| Deed Book / Page | 6190 / 36 |
| Record Updated | Sep 20, 2026 |
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 | $21,727.00 | $1,757,980 (-) Land $1,099,210 Building $658,770 | $1,230,586 Land $769,447 Building $461,139 |
| 2024 | $21,727.00 (+6.21%) | ||
| 2023 | $20,456.00 (+0.92%) | $1,757,980 (-) Land $1,099,210 Building $658,770 | |
| 2022 | $20,270.00 | $1,757,980 Land $1,099,210 Building $658,770 |
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 AE high risk |
|---|---|
| 100-Year Floodplain | Yes 1% annual chance |
| Floodway | No |
| Base Flood Elevation | 11.0 ft |
| Flood Insurance Requirement | Required federally backed loans |
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 | Not rated no burnable land within 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 288 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 |
May also be available: Frontier, T-Mobile.
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