Greenwich Town property record for 164 Mason St, Greenwich, CT 06830
| Property Type | Mixed Use Commercial Office / Residential |
|---|---|
| Details | 9,160 sqft · built 1910 |
| Lot Size | 0.33 acres (14,375 sqft) |
| Owner | 2 Company Names on Record |
| Tax Bill | $57,248 (2026) |
| Deeds & Mortgages | Feb 2022 Refinance |
| Flood Zone | Zone X (minimal risk) |
| APN | 01-1869S |
| Primary APN | 01-1869S |
|---|---|
| Alternative APNs |
|
| Total Rooms | 6 Rooms |
|---|---|
| Units | 5 Units |
| Stories | 3 Stories |
| Building Area | 9,160 sqft Total Area |
| Basement Area | 3,103 sqft |
| Unfinished Basement | 3,103 sqft |
| Elevator | Elevator |
| Year Built | Built 1910 |
|---|---|
| Effective Year Built | Effective 1910 |
| Construction Type | Frame |
| Roof Type | Flat |
| Roof Material | Built-Up Asphalt |
| Lot Area | 14,375 sqft (0.33 acres) |
| Deck Area | Deck Area |
| Heating System | Forced Air with A/C |
|---|
| Account Number | 285/177 |
|---|---|
| Street Address | 164 MASON ST |
| City | GREENWICH |
| State | CT |
| Zip | 06830-6677 |
| Property Category | Commercial |
| Property Type | Commercial > Office > Mixed Use Commercial Office / Residential |
| Local Zoning Code | CGB |
| Legal Block | 1869/S |
| Jurisdiction | GREENWICH CT |
| Township / Civil Division | GREENWICH |
| Census Block Group | 1 |
| Census Block | 1003 |
| 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 | 2 Company Names on Record |
|---|---|
| Mailing Address | 551 5TH AVE, NEW YORK, NY 10176-0001 |
| Owner Type | Company |
| Vesting | Company |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Jul 1, 2015 |
| Deed Sale | Jul 1, 2015 |
| Deed Book / Page | 6924 / 328 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | GREENWICH CT |
| Property Address | 164 MASON ST, GREENWICH, CT 06830-6677 |
| Transaction Type | Mortgage |
| Record Updated | Mar 9, 2023 |
| Name | Verified Name |
|---|
| Document Number | 0008058-95 |
|---|---|
| Date | Feb 10, 2022 |
| Book Page | 8058/95 |
| Instrument | 1296 |
| Name | FIRST REPUBLIC BANK |
|---|---|
| Type | Bank |
| Type | Stand-Alone Refinance |
|---|---|
| Amount | Amount Recorded |
| Term | 121 Months |
| Due | Mar 1, 2032 |
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 | $57,248.00 (-5.35%) | $5,460,490 (+11.57%) Land $2,282,630 Building $3,177,860 | |
| 2025 | $60,486.00 (+6.21%) | $4,894,050 (-) Land $2,162,790 Building $2,731,260 | $3,425,835 Land $1,513,953 Building $1,911,882 |
| 2023 | $56,947.00 (+0.92%) | $4,894,050 (-) Land $2,162,790 Building $2,731,260 | |
| 2022 | $56,428.00 | $4,894,050 Land $2,162,790 Building $2,731,260 |
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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