Greenwich Town property record for 21 Prospect St, Greenwich, CT 06830
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3 ba · 2,050 sqft · built 1910 |
| Lot Size | 0.18 acres (7,841 sqft) |
| Owner | Company Name on File |
| Last Sale | $980,000 (Nov 2020) |
| Tax Bill | $7,712 (2026) |
| Deeds & Mortgages | Nov 2024 Transfer Nov 2020 Sale & Mortgage |
| Flood Zone | Zone X (moderate risk) |
| APN | 01-1166S |
| Primary APN | 01-1166S |
|---|---|
| Alternative APNs |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Half Baths | 2 Half Baths |
| Total Rooms | 9 Rooms |
| Stories | 3 Stories |
| Building Area | 2,050 sqft Living Area |
| Attic | Attic |
| Attic Area | 300 sqft |
| Basement Area | 600 sqft |
| Unfinished Basement | 600 sqft |
| Year Built | Built 1910 |
|---|---|
| Effective Year Built | Effective 1965 |
| Architectural Style | Colonial |
| Exterior Material | Wood Siding |
| Construction Type | Frame |
| Roof Type | Gable |
| Roof Material | Asphalt |
| Lot Area | 7,841 sqft (0.18 acres) |
| Deck Area | Deck Area |
| Cooling System | HVAC |
|---|---|
| Heating System | Forced Air with A/C |
| Heating Fuel | Oil |
| Account Number | 249/072 |
|---|---|
| Street Address | 21 PROSPECT ST |
| City | GREENWICH |
| State | CT |
| Zip | 06830-5226 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R-6 |
| Legal Block | 1166/S |
| Jurisdiction | GREENWICH CT |
| Township / Civil Division | GREENWICH |
| Census Block Group | 1 |
| Census Block | 1003 |
| Census Tract | 10500 |
21 Prospect St is owned by a company that acquired it in June 2024.
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 File |
|---|---|
| Mailing Address | 21 PROSPECT ST, GREENWICH, CT 06830-5226 |
| Owner Type | Company |
| Vesting | Company |
| Date | Document |
|---|---|
| Nov 13, 2024 | Quit Claim Deed, Transfer Quitclaim |
| Nov 12, 2020 | Warranty Deed, Transfer · Stand-Alone First Mortgage UBS BANK USA |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Nov 12, 2020 · Amount on File |
| Deed Sale | Nov 12, 2020 · Amount on File |
| Prior Sale | Nov 15, 2016 · Amount on File |
| Deed Document Number | 202010202 |
| Deed Book / Page | 7774 / 51 |
| Last Transfer Date | Jun 26, 2024 |
| Transfer Doc | 008382-183 |
| Record Updated | Oct 29, 2026 |
| Document Type | Quit Claim Deed |
|---|---|
| Jurisdiction | GREENWICH CT |
| Recording Date | Nov 13, 2024 |
| Property Address | 21 PROSPECT ST, GREENWICH, CT 06830-5226 |
| Document Number | 008382-183 |
| Book / Page | 8382 / 183 |
| Instrument Date | Jun 26, 2024 |
| Instrument | 6412 |
| Transaction Type | Transfer |
| Record Updated | Nov 27, 2024 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | No Consideration Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 21 PROSPECT ST, GREENWICH, CT 06830-5226 |
| Document Type | Warranty Deed |
|---|---|
| Jurisdiction | GREENWICH CT |
| Recording Date | Nov 12, 2020 |
| Property Address | 21 PROSPECT ST, GREENWICH, CT 06830-5226 |
| Document Number | 7774-51 |
| Book / Page | 7774 / 51 |
| Instrument Date | Nov 11, 2020 |
| Instrument | 10202 |
| Transaction Type | Transfer |
| Record Updated | May 21, 2021 |
| Amount | Amount on Record |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $0.00 |
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|
| Document Number | 10203 |
|---|---|
| Date | Nov 12, 2020 |
| Instrument | 10203 |
| Name | UBS BANK USA |
|---|---|
| Type | Bank |
| Type | Stand-Alone First Mortgage |
|---|---|
| Amount | Amount on Record |
| Rate Type | Adjustable Rate |
|---|---|
| Rate | 2.5% |
| Type Change Date | Dec 1, 2030 |
| Max Rate At Change | 2.25% |
| Index | LIBOR |
The 2026 property tax bill for 21 Prospect St was $7,712, up 10.8% from the year before.
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 | $7,712.00 (+10.79%) | $735,630 (+30.61%) Land $390,740 Building $344,890 | $1,835,267 (+365.5%) |
| 2025 | $6,961.00 | $563,220 Land $332,990 Building $230,230 | $394,254 Land $233,093 Building $161,161 |
| 2024 | $6,961.00 (+6.21%) | ||
| 2023 | $6,554.00 (+0.92%) | $563,220 (-) Land $332,990 Building $230,230 | |
| 2022 | $6,494.00 | $563,220 Land $332,990 Building $230,230 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 21 Prospect St in Zone X, an area of moderate flood risk, within 100 ft of a high-risk flood zone.
Source: FEMA National Flood Hazard Layer, effective November 28, 2025
| FEMA Flood Zone | Zone X moderate risk |
|---|---|
| 500-Year Floodplain | Yes 0.2% annual chance |
| Nearest Special Flood Hazard Area | Zone AE, within 100 ft |
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
The area around 21 Prospect St has no burnable land within ember reach, so its wildfire risk is not rated.
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 372 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 |
| AT&T Fixed Wireless | 100 / 20 |
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