New York City property record for 643 Knickerbocker Ave, Brooklyn, NY 11221
| Property Type | Multi-Family Dwellings |
|---|---|
| Details | 3,898 sqft · built 1915 |
| Lot Size | 0.04 acres (1,750 sqft) |
| Owner | Company Name on File |
| Last Sale | $875,000 (Mar 2018) |
| Tax Bill | $16,695 (2025) |
| Deeds & Mortgages | Apr 2021 Mortgage Mar 2018 Sale |
| APN | 03365-0109 |
| Primary APN | 03365-0109 |
|---|---|
| Alternative APNs |
|
| Units | 5 Units |
|---|---|
| Stories | 4 Stories |
| Building Area | 3,898 sqft Living Area |
| 1st Floor Area | 1,000 sqft |
| Year Built | Built 1915 |
|---|---|
| Effective Year Built | Effective 1915 |
| Architectural Style | Multi-Family |
| Construction Type | Brick |
| Lot Area | 1,750 sqft (0.04 acres) |
| Lot Dimensions | 87.5 ft deep x 20 ft wide |
| Account Number | 3-03365-0109 |
|---|---|
| Street Address | 643 KNICKERBOCKER AVE |
| City | BROOKLYN |
| State | NY |
| Zip | 11221-5563 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Multi-Family Dwellings |
| Local Zoning Code | R6 |
| Legal Block | 3365 |
| Legal Lot Number | 109 |
| Jurisdiction | KINGS (BROOKLYN) NY |
| Township / Civil Division | BROOKLYN |
| Census Block Group | 1 |
| Census Block | 1000 |
| Census Tract | 43500 |
Source: New York City records · APN 03365-0109
Assessment roll updated May 4, 2026 · Last verified August 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 File |
|---|---|
| Mailing Address | 401 E 83RD ST, NEW YORK, NY 10028-6107 |
| Owner Type | Company |
| Vesting | Company |
| Date | Document |
|---|---|
| Apr 20, 2021 | Deed of Trust, Mortgage KEARNY BANK |
| Mar 27, 2018 | Grant Deed, Transfer MILLENIUM ABSTRACT CORPORATION |
| Deed Names | Verified Name on Deed |
|---|---|
| Last Sale | Mar 27, 2018 · Amount on Record |
| Deed Sale | Mar 27, 2018 · Amount on Record |
| Deed Document Number | 2018102605 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | KINGS (BROOKLYN) NY |
| Property Address | 643 KNICKERBOCKER AVE, BROOKLYN, NY 11221-5037 |
| Transaction Type | Mortgage |
| Record Updated | Mar 15, 2023 |
| Name | Verified Name |
|---|
| Document Number | 0000141400 |
|---|---|
| Date | Apr 20, 2021 |
| Instrument | 2021000141400 |
| Name | KEARNY BANK |
|---|---|
| Address | 120 PASSAIC AVE, FAIRFIELD, NJ 07004 |
| Amount | Amount Recorded |
|---|
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | KINGS (BROOKLYN) NY |
| Recording Date | Mar 27, 2018 |
| Property Address | 643 KNICKERBOCKER AVE, BROOKLYN, NY 11221-5037 |
| Document Number | 0000102605 |
| Instrument Date | Mar 15, 2018 |
| Instrument | 102605 |
| Transaction Type | Transfer |
| Record Updated | Apr 06, 2018 |
| Title Company | MILLENIUM ABSTRACT CORPORATION |
| Amount | Amount Recorded |
|---|---|
| Tax | $3,500.00 |
| Amount Accuracy | Confirmed |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Company |
| Address | 401 E 83RD ST #3D NEW YORK NY 100286191, 3D, NEW YORK, NY 10028-6191 |
Source: New York City records · Assessment roll updated May 4, 2026 · Last verified August 2026
| Type | Name |
|---|---|
| State | New York |
| County | Kings County |
| Municipality | New York City |
| Unified School District | New York City Department Of Education (PK - 12) |
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.
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $482,850 (+16.63%) Land $83,700 Building $399,150 | $1,073,000 (+16.63%) Land $186,000 Building $887,000 | |
| 2025 | $16,695.00 (+7.98%) | $414,000 (+22.99%) Land $83,700 Building $330,300 | $920,000 (+22.99%) Land $186,000 Building $734,000 |
| 2024 | $15,461.00 (+8%) | ||
| 2023 | $14,316.00 | $336,600 Land $83,700 Building $252,900 | $748,000 Land $186,000 Building $562,000 |
Source: FEMA National Flood Hazard Layer · FEMA OpenFEMA NFIP redacted claims and policies, census block group 360470435001, refreshed September 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026
| FEMA Flood Zone | Not on file |
|---|---|
| Nearby Flood Policies | 1 in force |
| Wildfire Risk | Not rated no burnable land within ember reach |
|---|
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: FCC Broadband Data Collection, availability as of December 31, 2025 · sampled at 1,574 locations within half a mile · Last verified October 2026
| Provider | Max Down / Up (Mbps) |
|---|---|
| Verizon Fiber · Fixed Wireless in parts of the area | 2,300 / 2,300 |
| Optimum Communications Cable · Fiber in parts of the area | 940 / 35 |
| T-Mobile USA Fixed Wireless | 100 / 20 |
May also be available: Spectrum, Starry.
Source: EPA Safe Drinking Water Information System via ECHO, 2026 Q3 · EPA community water system boundaries v3.0, March 2026 · Last verified October 2026
| Water System | NEW YORK CITY SYSTEM serves 8,271,000 people |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Dec 2025 |
| Lead | 10 ppb (2024) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | Uncovered finished water reservoir currently in violation since Feb 2017 |
| Monitoring and Reporting | None last 3 years |
Results are for the whole water system as reported to EPA, not water tested at this address; lead at the tap also depends on the building's own pipes. The full violation and enforcement history is in the system's EPA record.
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