Greenwich Town property record for 428 Valley Rd, Cos Cob, CT 06807
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 5 ba · 3,593 sqft · built 1967 |
| Lot Size | 0.28 acres (12,197 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $855,000 (Jan 2006) |
| Tax Bill | $12,508 (2026) |
| Deeds & Mortgages | Feb 2021 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 08-1742S |
| Primary APN | 08-1742S |
|---|---|
| Alternative APNs |
|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 5 Baths |
| Total Rooms | 10 Rooms |
| Stories | 2 Stories |
| Building Area | 3,593 sqft Living Area |
| Basement Area | 1,903 sqft |
| Unfinished Basement | 1,903 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1967 |
|---|---|
| Effective Year Built | Effective 1975 |
| Architectural Style | Cape Cod |
| Exterior Material | Wood Siding |
| Construction Type | Frame |
| Roof Type | Gable |
| Roof Material | Asphalt |
| Lot Area | 12,197 sqft (0.28 acres) |
| Garage Type | Basement |
| Parking Spaces | 2 Parking Spaces |
| Deck Area | Deck Area |
| Cooling System | HVAC |
|---|---|
| Heating System | Forced Air with A/C |
| Heating Fuel | Gas |
| Account Number | 401/104 |
|---|---|
| Street Address | 428 VALLEY RD |
| City | COS COB |
| State | CT |
| Zip | 06807-1622 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R-12 |
| Legal Block | 1742/S |
| Jurisdiction | GREENWICH CT |
| Township / Civil Division | GREENWICH |
| Census Block Group | 3 |
| Census Block | 3005 |
| Census Tract | 10202 |
428 Valley Rd is owned and occupied by two individuals who bought it in January 2006.
Source: Greenwich Town records, as of October 21, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 428 VALLEY RD, COS COB, CT 06807-1622 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
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 30, 2006 · Amount on File |
| Deed Sale | Jan 30, 2006 · Amount on File |
| Deed Book / Page | 5108 / 271 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | GREENWICH CT |
| Property Address | 428 VALLEY RD, COS COB, CT 06807-1622 |
| Transaction Type | Mortgage |
| Record Updated | Feb 18, 2021 |
| Name | Verified Name |
|---|
| Document Number | 7819-63 |
|---|---|
| Date | Feb 3, 2021 |
| Book Page | 7819/63 |
| Instrument | 1021 |
| Name | CROSSCOUNTRY MORTGAGE INC |
|---|---|
| Type | Mortgage Company |
| Type | Balloon Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | Mar 1, 2051 |
The 2026 property tax bill for 428 Valley Rd was $12,508, up 6.2% from the year before.
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 |
|---|---|---|---|
| 2026 | $12,508.00 (+6.21%) | $1,193,080 (+25.2%) Land $560,280 Building $632,800 | $2,742,902 (+311.21%) |
| 2025 | $11,777.00 | $952,910 Land $424,410 Building $528,500 | $667,037 Land $297,087 Building $369,950 |
| 2024 | $11,777.00 (+54.63%) | ||
| 2023 | $7,616.00 (+0.93%) | $654,500 (-) Land $424,410 Building $230,090 | |
| 2022 | $7,546.00 | $654,500 Land $424,410 Building $230,090 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 428 Valley Rd 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 428 Valley Rd 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 250 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.
4G LTE (outdoors only), no 5G reported
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