Greenwich Town property record for 12 River Ln, Cos Cob, CT 06807
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2.5 ba · 2,653 sqft · built 1947 |
| Lot Size | 0.25 acres (10,890 sqft) |
| Owner | 2 Trust Names on File |
| Last Sale | $2,225,000 (Jan 2025) |
| Tax Bill | $11,595 (2025) |
| Deeds & Mortgages | Jan 2025 Sale & Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 08-1358S |
| Primary APN | 08-1358S |
|---|---|
| Alternative APNs |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 8 Rooms |
| Stories | 2 Stories |
| Building Area | 2,653 sqft Living Area |
| Basement Area | 864 sqft |
| Unfinished Basement | 864 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1947 |
|---|---|
| Effective Year Built | Effective 1970 |
| Architectural Style | Cape Cod |
| Exterior Material | Wood Siding |
| Construction Type | Frame |
| Roof Type | Gable |
| Roof Material | Asphalt |
| Lot Area | 10,890 sqft (0.25 acres) |
| Garage Type | Attached |
| Parking Spaces | 1 Parking Space |
| Cooling System | HVAC |
|---|---|
| Heating System | Forced Air with A/C |
| Heating Fuel | Oil |
| Account Number | 366/136 |
|---|---|
| Street Address | 12 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 | 1358/S |
| Jurisdiction | GREENWICH CT |
| Township / Civil Division | GREENWICH |
| Census Block Group | 1 |
| Census Block | 1001 |
| Census Tract | 10800 |
12 River Ln is owner-occupied and held in a trust since January 2025.
Source: Greenwich Town records, as of June 25, 2026
| Owner of Record | 2 Trust Names on File |
|---|---|
| Mailing Address | 12 RIVER LN, COS COB, CT 06807-2513 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust, Revocable Trust |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Jan 15, 2025 · Amount on File |
| Deed Sale | Jan 15, 2025 · Amount on File |
| Prior Sale | Oct 17, 2014 · Amount on File |
| Deed Document Number | 2025218 |
| Deed Book / Page | 8400 / 100 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed |
|---|---|
| Jurisdiction | GREENWICH CT |
| Recording Date | Jan 15, 2025 |
| Property Address | 12 RIVER LN, COS COB, CT 06807-2513 |
| Document Number | 008400-100 |
| Book / Page | 8400 / 100 |
| Instrument Date | Jan 15, 2025 |
| Instrument | 218 |
| Transaction Type | Transfer |
| Record Updated | Jan 30, 2025 |
| Amount | Amount on Record |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $0.00 |
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|
| Date | Jan 15, 2025 |
|---|
| Name | BANK OF AMERICA NA |
|---|---|
| Type | Bank |
| Type | Stand-Alone First Mortgage |
|---|---|
| Amount | Amount on Record |
| Rate Type | Adjustable Rate |
|---|---|
| Rate | 5.88% |
| Type Change Date | Feb 1, 2032 |
| Max Rate At Change | 2.75% |
| Index | Other |
The 2025 property tax bill for 12 River Ln was $11,595.
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 | $11,595.00 | $938,210 Land $483,980 Building $454,230 | $656,747 Land $338,786 Building $317,961 |
| 2024 | $11,595.00 (+6.21%) | ||
| 2023 | $10,917.00 (+0.92%) | $938,210 (-) Land $483,980 Building $454,230 | |
| 2022 | $10,818.00 | $938,210 Land $483,980 Building $454,230 |
Assessed value is set for property tax purposes, not a market price estimate; it is a fraction of this property's market value.
FEMA maps place 12 River Ln in Zone X, an area of minimal flood risk, within 500 ft of a high-risk flood zone.
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.
Wildfire risk around 12 River Ln is low, with less than a 0.01% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 99.1% of the US · lower than 99% 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 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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