Greenwich Town property record for 37 Harold St, Cos Cob, CT 06807
| Property Type | Duplex |
|---|---|
| Details | 6 bd · 3.5 ba · 3,114 sqft · built 1906 |
| Lot Size | 0.11 acres (4,792 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $1,114,405 (Jun 2022) |
| Tax Bill | $7,643 (2025) |
| Deeds & Mortgages | Jun 2022 Sale & Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 08-2011S |
| Primary APN | 08-2011S |
|---|---|
| Alternative APNs |
|
| Bedrooms | 6 Beds |
|---|---|
| Full Baths | 3.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 11 Rooms |
| Stories | 2 Stories |
| Building Area | 3,114 sqft Living Area |
| Basement Area | 238 sqft |
| Unfinished Basement | 238 sqft |
| Year Built | Built 1906 |
|---|---|
| Effective Year Built | Effective 1970 |
| Architectural Style | Duplex Single |
| Exterior Material | Aluminum/Vinyl |
| Construction Type | Frame |
| Roof Type | Gable |
| Roof Material | Asphalt |
| Lot Area | 4,792 sqft (0.11 acres) |
| Garage Type | Basement |
| Parking Spaces | 2 Parking Spaces |
| Deck Area | Deck Area |
| Cooling System | HVAC |
|---|---|
| Heating System | Hot Water |
| Heating Fuel | Oil |
| Account Number | 386/069 |
|---|---|
| Street Address | 37 HAROLD ST |
| City | COS COB |
| State | CT |
| Zip | 06807-2132 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Local Zoning Code | R-6 |
| Legal Block | 2011/S |
| Jurisdiction | GREENWICH CT |
| Township / Civil Division | GREENWICH |
| Census Block Group | 2 |
| Census Block | 2007 |
| Census Tract | 10202 |
37 Harold St, a duplex, is owned and occupied by two individuals who bought it in June 2022.
Source: Greenwich Town records, as of June 25, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 37 HAROLD ST, COS COB, CT 06807-2132 |
| 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 | Jun 21, 2022 · Amount on File |
| Deed Sale | Jun 21, 2022 · Amount on File |
| Prior Sale | Oct 19, 2007 · Amount on File |
| Deed Document Number | 20225945 |
| Deed Book / Page | 8124 / 253 |
| Record Updated | Sep 20, 2026 |
| Document Type | Warranty Deed |
|---|---|
| Jurisdiction | GREENWICH CT |
| Recording Date | Jun 21, 2022 |
| Property Address | 37 HAROLD ST, COS COB, CT 06807-2132 |
| Document Number | 008124-253 |
| Book / Page | 8124 / 253 |
| Instrument Date | Jun 16, 2022 |
| Instrument | 5945 |
| Transaction Type | Transfer |
| Record Updated | Nov 20, 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 |
|---|---|
| Relationship | Joint Tenants |
| Document Number | 0000005946 |
|---|---|
| Date | Jun 21, 2022 |
| Instrument | 5946 |
| Name | GUARANTEED RATE INC |
|---|---|
| Type | Non-Lending Institution |
| Type | Stand-Alone First Mortgage |
|---|---|
| Amount | Amount on Record |
The 2025 property tax bill for 37 Harold St was $7,643.
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 | $7,643.00 | $618,380 Land $414,050 Building $204,330 | $432,866 Land $289,835 Building $143,031 |
| 2024 | $7,643.00 (+6.23%) | ||
| 2023 | $7,195.00 (+5.34%) | $618,380 (+4.4%) Land $414,050 Building $204,330 | |
| 2022 | $6,830.00 | $592,340 Land $414,050 Building $178,290 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 37 Harold St in Zone X, an area of minimal flood risk.
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.
Wildfire risk around 37 Harold St 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 | Direct burnable vegetation |
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 392 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Optimum Fiber · Cable | 8,000 / 8,000 |
| Frontier Fiber | 5,000 / 5,000 |
| Verizon Fixed Wireless · Fiber in parts of the area | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: AT&T.
Search by:
By searching, you agree to: Terms • Privacy • Disclosures