Westchester County and North Castle Town property record for 21 Windmill Rd, Armonk, NY 10504
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 3 ba · 4,727 sqft · built 1955 |
| Lot Size | 1.21 acres (52,708 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $571,200 (Jun 2016) |
| Tax Bill | $1,074 (2025) |
| Deeds & Mortgages | May 2021 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 553800 101.04-2-27 |
| Primary APN | 553800 101.04-2-27 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 3 Baths |
| Building Area | 4,727 sqft Living Area |
| 1st Floor Area | 2,989 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1955 |
|---|---|
| Effective Year Built | Effective 1955 |
| Architectural Style | Split Level |
| Exterior Material | Other |
| Lot Area | 52,708 sqft (1.21 acres) |
| Garage Type | Basement |
| Porch | Porch |
| Porch Area | 345 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Hot Water |
| Sewer | Septic |
| Water Source | Commercial |
| Account Number | R1A |
|---|---|
| Street Address | 21 WINDMILL RD |
| City | ARMONK |
| State | NY |
| Zip | 10504-2612 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R-1A |
| Legal Subdivision | WINDMILL FARM |
| Legal Block | 2 |
| Legal Lot Number | 27.000 |
| Jurisdiction | WESTCHESTER NY |
| Township / Civil Division | NORTH CASTLE |
| Census Block Group | 2 |
| Census Block | 2013 |
| Census Tract | 12304 |
Source: Westchester County and North Castle Town records, as of August 10, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Individual Names on Record |
|---|---|
| Mailing Address | 21 WINDMILL RD, ARMONK, NY 10504-2612 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Jun 3, 2016 · Amount on Record |
| Deed Sale | Jun 3, 2016 · Amount on Record |
| Prior Sale | Feb 22, 2016 · Amount on Record |
| Deed Document Number | 2016561113294 |
| Last Transfer Date | Jan 13, 2017 |
| Transfer Doc | 0570123492 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | WESTCHESTER NY |
| Property Address | 21 WINDMILL RD, ARMONK, NY 10504-2612 |
| Transaction Type | Mortgage |
| Record Updated | Dec 7, 2022 |
| Name | Verified Name |
|---|---|
| Address | 21 WINDMILL RD, ARMONK, NY 10504-2612 |
| Document Number | 0611263382 |
|---|---|
| Date | May 6, 2021 |
| Instrument | 611263382 |
| Name | QUICKEN LOANS LLC |
|---|---|
| Type | Mortgage Company |
| Address | DETROIT, MI 48226 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 360 Months |
| Due | May 1, 2051 |
Source: Westchester County and North Castle Town assessment roll, as of May 14, 2026
| Type | Name |
|---|---|
| State | New York |
| County | Westchester County |
| County Subdivision | North Castle Town |
| Unified School District | Byram Hills Central School District (KG - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $1,074.00 | $17,550 (-) Land $3,200 Building $14,350 | $1,083,333 (+11.11%) Land $197,531 Building $885,802 |
| 2024 | $17,550 (-) Land $3,200 Building $14,350 | $975,000 (-8.33%) Land $177,778 Building $797,222 | |
| 2023 | $17,550 Land $3,200 Building $14,350 | $1,063,636 Land $193,939 Building $869,697 |
Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.
Source: FEMA National Flood Hazard Layer, effective September 18, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on Record median of 26 policies |
| Nearby Flood Policies | 26 in force |
| Nearby Flood Claims | 25 (1978–2023) |
| Claims Outside the SFHA | 10 of 25 |
| Most Recent Claim | Dec 2023 · other causes |
Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 80% of the US · above 54% of New York |
|---|---|
| Wildfire Likelihood | 0.02% annual chance |
| Exposure | Direct burnable vegetation |
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 | NORTH CASTLE WATER DISTRICT #2 serves 1,200 people · EPA ID NY5903446 |
|---|---|
| Water Source | Groundwater |
| Last State Inspection | Mar 2026 |
| Lead | 4 ppb (2023–2025) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | None 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. The service area is an EPA estimate; the actual supplier may differ.
Source: FCC Broadband Data Collection, based on 83 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Verizon Fiber | 2,300 / 2,300 |
| Optimum Cable | 940 / 35 |
5G and 4G LTE (outdoors only)
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