Greenwich Town property record for 523 E Putnam Ave, #C, Cos Cob, CT 06807
| Property Type | Condominium |
|---|---|
| Details | 3 bd · 3.5 ba · 3,632 sqft · built 2009 |
| Lot Size | 0.829 acres (36,145 sqft) |
| Owner | Company Name on Record |
| Last Sale | $3,550,000 (Dec 2022) |
| Tax Bill | $23,758 (2025) |
| Deeds & Mortgages | Dec 2022 Sale |
| Flood Zone | Zone X (minimal risk) |
| APN | GREE M:08A B:2022/S |
| Primary APN | GREE M:08A B:2022/S |
|---|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 3.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 7 Rooms |
| Units | 12 Units |
| Stories | 1 Story |
| Building Area | 3,632 sqft Living Area |
| Year Built | Built 2009 |
|---|---|
| Effective Year Built | Effective 2009 |
| Architectural Style | Condo/Apartment |
| Exterior Material | Wood Siding |
| Roof Type | Gable |
| Roof Material | Asphalt |
| Lot Area | 36,145 sqft |
| Deck Area | Deck Area |
| Cooling System | HVAC |
|---|---|
| Heating System | Forced Air with A/C |
| Street Address | 523 E PUTNAM AVE, C |
|---|---|
| City | COS COB |
| State | CT |
| Zip | 06807-2506 |
| Property Category | Residential |
| Property Type | Residential > Condominium / Townhouse > Condominium |
| Local Zoning Code | R-C7 |
| Legal Block | 2022/S |
| Jurisdiction | GREENWICH CT |
| Township / Civil Division | GREENWICH |
| Census Block Group | 1 |
| Census Block | 1001 |
| Census Tract | 10800 |
Source: Greenwich Town records, as of October 20, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Company Name on Record |
|---|---|
| Mailing Address | 523 E PUTNAM AVE, C, COS COB, CT 06807-2506 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Dec 1, 2022 · Amount on Record |
| Deed Sale | Dec 1, 2022 · Amount on Record |
| Deed Document Number | 20229730 |
| Deed Book / Page | 8176 / 153 |
| Record Updated | Oct 29, 2026 |
| Document Type | Warranty Deed |
|---|---|
| Jurisdiction | GREENWICH CT |
| Recording Date | Dec 1, 2022 |
| Property Address | 523 E PUTNAM AVE # C, C, COS COB, CT 06807-2506 |
| Document Number | 008176-153 |
| Book / Page | 8176 / 153 |
| Instrument Date | Nov 17, 2022 |
| Instrument | 9730 |
| Transaction Type | Transfer |
| Record Updated | Dec 16, 2022 |
| Amount | Amount Recorded |
|---|---|
| Tax | $0.00 |
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 523 E PUTNAM AVE # C, C, COS COB, CT 06807-2506 |
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 | $23,758.00 | $1,922,340 (-) Building $1,922,340 | $1,345,638 Building $1,345,638 |
| 2024 | $23,758.00 (+6.21%) | ||
| 2023 | $22,368.00 (+0.92%) | $1,922,340 (-) Building $1,922,340 | |
| 2022 | $22,165.00 | $1,922,340 Building $1,922,340 |
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 |
|---|---|
| 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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