Greenwich Town property record for 189 Mason St, Greenwich, CT 06830
| Property Type | Office Building |
|---|---|
| Details | 2,996 sqft · built 1910 |
| Lot Size | 0.18 acres (7,841 sqft) |
| Owner | Company Name on Record |
| Last Sale | $2,750,000 (Jan 2020) |
| Tax Bill | $20,093 (2026) |
| Deeds & Mortgages | Jan 2020 Sale |
| Flood Zone | Zone X (minimal risk) |
| APN | 01-2996S |
| Primary APN | 01-2996S |
|---|---|
| Alternative APNs |
|
| Total Rooms | 1 Room |
|---|---|
| Stories | 3 Stories |
| Building Area | 2,996 sqft Total Area |
| Basement Area | 959 sqft |
| Unfinished Basement | 959 sqft |
| Year Built | Built 1910 |
|---|---|
| Effective Year Built | Effective 1910 |
| Construction Type | Frame |
| Roof Type | Gable |
| Roof Material | Shingle |
| Lot Area | 7,841 sqft (0.18 acres) |
| Cooling System | HVAC |
|---|---|
| Heating System | Hot Water |
| Account Number | 285/183 |
|---|---|
| Street Address | 189 MASON ST |
| City | GREENWICH |
| State | CT |
| Zip | 06830-6608 |
| Property Category | Commercial |
| Property Type | Commercial > Office > Office Building |
| Local Zoning Code | CGB |
| Legal Block | 2996/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 are on file and can be viewed instantly on this page with a free 10-day trial.
| Owner of Record | Company Name on Record |
|---|---|
| Mailing Address | 189 MASON ST, GREENWICH, CT 06830-6608 |
| Owner Type | Company |
| Vesting | Company |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Jan 9, 2020 · Amount on Record |
| Deed Sale | Jan 9, 2020 · Amount on Record |
| Prior Sale | Feb 25, 1999 · Amount on Record |
| Deed Document Number | 2020184 |
| Deed Book / Page | 7611 / 84 |
| Record Updated | Oct 29, 2026 |
| Document Type | Warranty Deed |
|---|---|
| Jurisdiction | GREENWICH CT |
| Recording Date | Jan 9, 2020 |
| Property Address | 189 MASON ST, GREENWICH, CT 06830-6608 |
| Document Number | 7611-84 |
| Book / Page | 007611 / 000084 |
| Instrument Date | Jan 6, 2020 |
| Instrument | 184 |
| Transaction Type | Transfer |
| Record Updated | Jan 28, 2020 |
| Title Company | UNKNOWN |
| Amount | Amount Recorded |
|---|---|
| Tax | $2,750.00 |
| Amount Accuracy | Confirmed |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Company |
| Address | 189 MASON ST GREENWICH CT 068306608, GREENWICH, CT 06830-6608 |
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 | $20,093.00 (-10.84%) | $1,916,530 (+5.11%) Land $1,290,240 Building $626,290 | |
| 2025 | $22,536.00 | $1,823,430 (-) Land $1,223,600 Building $599,830 | $1,276,401 Land $856,520 Building $419,881 |
| 2024 | $22,536.00 (+6.22%) | ||
| 2023 | $21,217.00 (+0.92%) | $1,823,430 (-) Land $1,223,600 Building $599,830 | |
| 2022 | $21,024.00 | $1,823,430 Land $1,223,600 Building $599,830 |
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.
Search by:
By searching, you agree to: Terms • Privacy • Disclosures