Greenwich Town property record for 3 River Ln, Cos Cob, CT 06807
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2.5 ba · 2,034 sqft · built 1939 |
| Lot Size | 0.15 acres (6,534 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $136,000 (Dec 2001) |
| Tax Bill | $7,364 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 08-1839S |
| Primary APN | 08-1839S |
|---|---|
| Alternative APNs |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 7 Rooms |
| Stories | 2 Stories |
| Building Area | 2,034 sqft Living Area |
| Basement Area | 672 sqft |
| Unfinished Basement | 672 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1939 |
|---|---|
| Effective Year Built | Effective 1950 |
| Architectural Style | Conventional |
| Exterior Material | Wood Siding |
| Construction Type | Frame |
| Roof Type | Gable |
| Roof Material | Asphalt |
| Lot Area | 6,534 sqft (0.15 acres) |
| Garage Type | Attached |
| Parking Spaces | 1 Parking Space |
| Cooling System | HVAC |
|---|---|
| Heating System | Hot Water |
| Heating Fuel | Oil |
| Account Number | 366/129 |
|---|---|
| Street Address | 3 RIVER LN |
| City | COS COB |
| State | CT |
| Zip | 06807-2513 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R-7 |
| Legal Block | 1839/S |
| Jurisdiction | GREENWICH CT |
| Township / Civil Division | GREENWICH |
| Census Block Group | 1 |
| Census Block | 1001 |
| Census Tract | 10800 |
Source: Greenwich Town assessment roll, 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 | 2 Individual Names on File |
|---|---|
| Mailing Address | 3 RIVER LN, COS COB, CT 06807-2513 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Dec 26, 2001 · Amount on Record |
| Deed Sale | Dec 26, 2001 · Amount on Record |
| Deed Book / Page | 3738 / 48 |
| 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 | $7,364.00 | $595,840 (-) Land $436,660 Building $159,180 | $417,088 Land $305,662 Building $111,426 |
| 2024 | $7,364.00 (+6.22%) | ||
| 2023 | $6,933.00 (+0.92%) | $595,840 (-) Land $436,660 Building $159,180 | |
| 2022 | $6,870.00 | $595,840 Land $436,660 Building $159,180 |
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 |
|---|---|
| Nearest Special Flood Hazard Area | Zone AE, within 500 ft |
| 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 | Not rated no burnable land within ember reach |
|---|
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 Communications Fiber · Cable | 8,000 / 8,000 |
| Verizon Fiber · Fixed Wireless in parts of the area | 980 / 880 |
May also be available: Frontier, T-Mobile USA.
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