Westchester County and Mamaroneck Town property record for 1223 Knickerbocker Ave, Mamaroneck, NY 10543
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 1.5 ba · 2,272 sqft · built 1978 |
| Lot Size | 0.18 acres (7,841 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $473,800 (Mar 2005) |
| Tax Bill | $14,555 (2026) |
| Deeds & Mortgages | Jan 2026 Line of Credit |
| Flood Zone | Zone X (minimal risk) |
| APN | 553203 8-15-480 |
| Primary APN | 553203 8-15-480 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 1.5 Baths |
| Half Baths | 1 Half Bath |
| Stories | 1 Story |
| Building Area | 2,272 sqft Living Area |
| 1st Floor Area | 1,544 sqft |
| Basement Area | 728 sqft |
| Finished Basement | 728 sqft |
| Unfinished Basement | 728 sqft |
| Year Built | Built 1978 |
|---|---|
| Effective Year Built | Effective 1978 |
| Architectural Style | Raised Ranch |
| Exterior Material | Aluminum/Vinyl |
| Lot Area | 7,841 sqft (0.18 acres) |
| Lot Dimensions | 100 ft deep x 75 ft wide |
| Garage Type | Basement |
| Porch | Slab |
| Porch Area | 240 sqft |
| Heating System | Forced Air with A/C |
|---|---|
| Heating Fuel | Oil |
| Sewer | Municipal |
| Water Source | Commercial |
| Account Number | 545300 |
|---|---|
| Street Address | 1223 KNICKERBOCKER AVE |
| City | MAMARONECK |
| State | NY |
| Zip | 10543-1418 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R-5 |
| Legal Subdivision | MAP OF HARBOR HEIGHTS |
| Legal Block | 480 |
| Jurisdiction | WESTCHESTER NY |
| Township / Civil Division | MAMARONECK |
| Census Block Group | 3 |
| Census Block | 3007 |
| Census Tract | 7300 |
1223 Knickerbocker Ave is owned and occupied by two individuals who bought it in March 2005.
Source: Westchester County and Mamaroneck Town records, as of October 21, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 1223 KNICKERBOCKER AVE, MAMARONECK, NY 10543-1418 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Mar 1, 2005 · Amount on File |
| Deed Sale | Mar 1, 2005 · Amount on File |
| Deed Document Number | 2005443020958 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | WESTCHESTER NY |
| Property Address | 1223 KNICKERBOCKER AVE, MAMARONECK, NY 10543-1418 |
| Transaction Type | Mortgage |
| Record Updated | Jan 19, 2026 |
| Title Company | ACCURATE GROUP, ACCURATE GROUP LLC |
| Name | Verified Name |
|---|---|
| Address | 1223 KNICKERBOCKER AVE, MAMARONECK, NY 10543-1418 |
| Document Number | 0660063156 |
|---|---|
| Date | Jan 6, 2026 |
| Instrument | 660063156 |
| Name | CITIZENS BANK NA |
|---|---|
| Type | Bank |
| Address | PROVIDENCE, RI 02903 |
| Type | Line of Credit |
|---|---|
| Amount | Amount on Record |
| Term | 299 Months |
| Due | Dec 21, 2050 |
| Rate Type | Adjustable Rate |
|---|---|
| Change Frequency | Monthly |
The 2026 property tax bill for 1223 Knickerbocker Ave was $14,555 with a homeowner's exemption, up 31.3% from the year before.
Source: Westchester County and Mamaroneck Town assessment roll, as of May 14, 2026
| Type | Name |
|---|---|
| State | New York |
| County | Westchester County |
| County Subdivision | Mamaroneck Town |
| Municipality | Mamaroneck Village |
| Unified School District | Mamaroneck Union Free School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $14,555.00 (+31.27%) Homeowner's exemption | ||
| 2025 | $11,088.00 | $707,000 (+3.97%) Land $191,500 Building $515,500 | $707,000 (+3.97%) Land $191,500 Building $515,500 |
| 2024 | Homeowner's exemption | $680,000 (+4.94%) Land $191,500 Building $488,500 | $680,000 (+4.94%) Land $191,500 Building $488,500 |
| 2023 | $648,000 Land $191,500 Building $456,500 | $648,000 Land $191,500 Building $456,500 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 1223 Knickerbocker Ave in Zone X, an area of minimal flood risk, though there have been 28 flood claims nearby since 2011.
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 File median of 31 policies |
| Community Rating System | Class 8 (10% premium discount) |
| Nearby Flood Policies | 31 in force |
| Nearby Flood Claims | 28 (2011–2024) |
| Most Recent Claim | Mar 2024 · river or lake flooding |
| Claims by Event |
|
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.
The area around 1223 Knickerbocker Ave 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 | WESTCHESTER JOINT WATER WORKS serves 59,629 people · EPA ID NY5903435 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Mar 2025 |
| Lead | 3 ppb (2026–2028) action level 15 ppb |
| Water Quality | Failure to filter currently in violation since Jun 1993 Haloacetic acids resolved · Jul 2019 |
|---|---|
| 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.
Source: FCC Broadband Data Collection, based on 458 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Optimum Fiber · Cable | 8,000 / 8,000 |
| Verizon Fiber | 980 / 880 |
| T-Mobile Fixed Wireless | 100 / 20 |
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