Greenwich Town property record for 525 E Putnam Ave, Cos Cob, CT 06807
| Property Type | Mixed Use Commercial Office / Residential |
|---|---|
| Details | 4,057 sqft · built 1945 |
| Lot Size | 0.22 acres (9,583 sqft) |
| Owner | Individual Name on Record |
| Last Sale | $1,600,000 (Feb 2009) |
| Tax Bill | $20,381 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 08-1853S |
| Primary APN | 08-1853S |
|---|---|
| Alternative APNs |
|
| Total Rooms | 4 Rooms |
|---|---|
| Units | 7 Units |
| Stories | 3 Stories |
| Building Area | 4,057 sqft Total Area |
| Basement Area | 2,091 sqft |
| Unfinished Basement | 2,091 sqft |
| Year Built | Built 1945 |
|---|---|
| Effective Year Built | Effective 1945 |
| Construction Type | Frame |
| Roof Type | Gable |
| Roof Material | Shingle |
| Lot Area | 9,583 sqft (0.22 acres) |
| Garage Type | Detached |
| Parking Spaces | 1 Parking Space |
| Deck Area | Deck Area |
| Account Number | 386/050 |
|---|---|
| Street Address | 525 E PUTNAM AVE |
| City | COS COB |
| State | CT |
| Zip | 06807-2565 |
| Property Category | Commercial |
| Property Type | Commercial > Office > Mixed Use Commercial Office / Residential |
| Local Zoning Code | LB |
| Legal Block | 1853/S |
| Jurisdiction | GREENWICH CT |
| Township / Civil Division | GREENWICH |
| Census Block Group | 1 |
| Census Block | 1001 |
| 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 | Individual Name on Record |
|---|---|
| Mailing Address | 525 E PUTNAM AVE, COS COB, CT 06807-2565 |
| Owner Type | Individual |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Feb 9, 2009 · Amount on Record |
| Deed Sale | Feb 9, 2009 · Amount on Record |
| Prior Sale | Apr 27, 1998 · Amount on Record |
| Deed Book / Page | 5723 / 180 |
| Transfer Doc | 005723-180 |
| 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 | $20,381.00 | $1,649,060 (-) Land $745,220 Building $903,840 | $1,154,342 Land $521,654 Building $632,688 |
| 2024 | $20,381.00 (+6.22%) | ||
| 2023 | $19,188.00 (+0.92%) | $1,649,060 (-) Land $745,220 Building $903,840 | |
| 2022 | $19,014.00 | $1,649,060 Land $745,220 Building $903,840 |
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 | 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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