Greenwich Town property record for 191 Mason St, Greenwich, CT 06830
| Property Type | Office Building |
|---|---|
| Details | 6,110 sqft · built 1910 |
| Lot Size | 0.31 acres (13,504 sqft) |
| Owner | Company Name on Record |
| Tax Bill | $47,563 (2026) |
| Flood Zone | Zone X (minimal risk) |
| APN | 01-1737S |
| Primary APN | 01-1737S |
|---|---|
| Alternative APNs |
|
| Total Rooms | 1 Room |
|---|---|
| Stories | 2 Stories |
| Building Area | 6,110 sqft Total Area |
| Basement Area | 3,055 sqft |
| Unfinished Basement | 3,055 sqft |
| Elevator | Elevator |
| Year Built | Built 1910 |
|---|---|
| Effective Year Built | Effective 1910 |
| Exterior Material | Brick |
| Construction Type | Frame |
| Roof Type | Flat |
| Roof Material | Built-Up Asphalt |
| Lot Area | 13,504 sqft (0.31 acres) |
| Heating System | Forced Air with A/C |
|---|
| Account Number | 285/184 |
|---|---|
| Street Address | 191 MASON ST |
| City | GREENWICH |
| State | CT |
| Zip | 06830-6608 |
| Property Category | Commercial |
| Property Type | Commercial > Office > Office Building |
| Local Zoning Code | CGB |
| Legal Block | 1737/S |
| Jurisdiction | GREENWICH CT |
| Township / Civil Division | GREENWICH |
| Census Block Group | 1 |
| Census Block | 1004 |
| Census Tract | 10600 |
Source: Greenwich Town records, as of October 21, 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 | 191 MASON ST, GREENWICH, CT 06830-6608 |
| Owner Type | Company |
| Vesting | Company |
| Deed Names | Name on Deed |
|---|---|
| Record Updated | Oct 29, 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 |
|---|---|---|---|
| 2026 | $47,563.00 (-9.48%) | $4,536,700 (+6.71%) Land $2,174,830 Building $2,361,870 | |
| 2025 | $52,545.00 | $4,251,520 (-) Land $2,062,340 Building $2,189,180 | $2,976,064 Land $1,443,638 Building $1,532,426 |
| 2024 | $52,545.00 (+6.21%) | ||
| 2023 | $49,471.00 (+0.92%) | $4,251,520 (-) Land $2,062,340 Building $2,189,180 | |
| 2022 | $49,020.00 | $4,251,520 Land $2,062,340 Building $2,189,180 |
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 | Not rated no burnable land within 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 501 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 |
| Starlink Satellite | 280 / 30 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: AT&T, Frontier.
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