Greenwich Town property record for 23 William St, Greenwich, CT 06830
| Property Type | Exempt (Full or Partial) |
|---|---|
| Lot Size | 0.28 acres (12,197 sqft) |
| Owner | Company Name on Record |
| Flood Zone | Zone X (minimal risk) |
| APN | 07-4085S |
| Primary APN | 07-4085S |
|---|---|
| Alternative APNs |
|
| Lot Area | 12,197 sqft (0.28 acres) |
|---|---|
| Deck Area | Deck Area |
| Total Buildings | 2 Buildings |
| Cooling System | HVAC |
|---|
| Account Number | 247/123 |
|---|---|
| Street Address | 23 WILLIAM ST |
| City | GREENWICH |
| State | CT |
| Zip | 06830-5608 |
| Property Category | Other |
| Property Type | Other > Exempt (Full or Partial) |
| Local Zoning Code | R-6 |
| Legal Block | 4085/S |
| Jurisdiction | GREENWICH CT |
| Township / Civil Division | GREENWICH |
| Census Block Group | 3 |
| Census Block | 3016 |
| Census Tract | 10300 |
Source: NPS National Register of Historic Places, as of August 1, 2026
| Historic District | Within the Fourth Ward Historic District listed 2000 · 160 contributing resources · NRIS 00000324 |
|---|
Federal listing alone does not restrict alterations; local historic district rules, which this data does not cover, may apply.
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 | Company Name on Record |
|---|---|
| Mailing Address | 5 PERRYRIDGE RD, GREENWICH, CT 06830-4608 |
| Owner Type | Company |
| Deed Names | Name on Deed |
|---|---|
| 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 | Assessed Value | Assessed Market Value |
|---|---|---|
| 2025 | $1,082,760 (-) Land $707,070 Building $375,690 | $757,932 Land $494,949 Building $262,983 |
| 2023 | $1,082,760 (-) Land $707,070 Building $375,690 | |
| 2022 | $1,082,760 Land $707,070 Building $375,690 |
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 182 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 | 2,300 / 2,300 |
| Starlink Satellite | 280 / 30 |
| AT&T Fixed Wireless | 100 / 20 |
May also be available: T-Mobile.
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