What the listing does not show
601 Knickerbocker Avenue
Brooklyn, NY 11221Two-family houseHigh risk
Listed at $1,150,000. The listing does not mention what city records show: 14 open housing violations, 11 of them immediately hazardous. A buyer can put that on the table before contract. A seller should expect the question.
- Asking
- $1,150,000
- Beds
- 4 beds
- Baths
- 2 baths
- Size
- 2,200 ft²
- Building
- Two-family house
- Built
- 1910
- Open housing violations
- 14
- Immediately hazardous
- 11
- Open building violations
- 0
- Unresolved penalties
- 0
01 / Findings
What to ask about
City records a buyer can raise and a seller should be ready to explain. A reading of open filings, not a forecast.
- 0111 open Class C (immediately hazardous) housing violations a buyer can raise, and a seller should be ready to explain.
- 02Checked: no open Buildings Department violations.
- 03Checked: no unresolved penalties on file.
- 04About 1,040 ft² of unused residential floor area the listing does not mention.
02 / Building
The building
Department of Finance class B2: Two-family house.
- Type
- Two-family house
- Year built
- 1910
- Floors
- 2
- Units
- 22 residential
- Building area
- 2,200 ft²
- Residential / commercial
- 2,200 / 0 ft²
- Lot
- 1,333 ft²20 × 66.67 ft
- Assessed value
- $75,540Tax assessment, not market value
- Assessed land
- $8,700
- Tax exemption
- None
03 / Zoning
What the lot allows
Zoned R6. Floor area ratio is how much building the lot can legally hold. Listings rarely spell this out.
Unused residential floor area
1,040ft²
Built at 68% of allowed
Zoning would still allow this much more housing on the lot.
- Commercial FAR allowed
- 0.00
- Community facility FAR
- 4.80
- Affordable housing bonus FAR
- 3.90
- Zoning district
- R6
04 / Checked
What was checked
A zero means the file exists and is clear. A dash means the city has no file for this address, which is not the same thing.
Housing (HPD)
14
open violations
11 immediately hazardous, 3 hazardous, 0 non-hazardous, 0 informational.
Registration not registered.
Buildings (DOB)
0
open violations
No open building violations on file.
Permits, unsafe structures, boilers, elevators, facades.
Penalties (ECB)
0
unresolved
No unresolved penalties on file.
05 / Full report
Not on the listing
Sale prices, mortgage amounts and document amounts the city has on file. The listing does not include them.
29 recorded documents · 3 sales of $10,000 or more · Last sale 2016 · Last mortgage 2016
Unlock the recorded amounts for 601 Knickerbocker Avenue
After you register, the paid report includes who owns the building, plus the amounts below from the city file.
- Owner details
- Last sale price
- Mortgage amount
- Recorded document amounts
Paid report
The rest of 601 Knickerbocker Avenue is not on the listing
After you register, the paid report names the owner. It also includes the city-file amounts the listing leaves out.
- Owner details
- Last sale price
- Mortgage amount
- Recorded document amounts
06 / FAQ
Questions
How many open violations does 601 Knickerbocker Avenue have?
As of Oct 6, 2026, the building at 601 Knickerbocker Avenue has 14 open HPD violations (11 Class C, 3 Class B, 0 Class A, 0 Class I), 0 open DOB violations, 0 unresolved ECB penalties. These are building records, so they apply to this listing.
What is the zoning of 601 Knickerbocker Avenue?
The lot is zoned R6. The building is built at a floor area ratio of 1.65 against 2.43 allowed for residential use, leaving about 1,040 ft² of unused residential floor area.
Is this property in a flood zone?
No. The lot is not inside a FEMA 100-year flood zone on the 2007 or 2015 maps.
What amounts are recorded for 601 Knickerbocker Avenue?
Owner details are in the paid report, available after you register. Last sale price, Mortgage amount, Recorded document amounts are in the city file and included there too.
Where does this data come from?
Records are combined from NYC DCP PLUTO (tax lot, zoning, FAR); NYC HPD (housing violations and registrations); NYC DOB and ECB (building violations and penalties); NYC ACRIS (recorded deeds, mortgages and satisfactions); Active for-sale listings. PLUTO version 26v2.
Sources
NYC DCP PLUTO (tax lot, zoning, FAR) · NYC HPD (housing violations and registrations) · NYC DOB and ECB (building violations and penalties) · NYC ACRIS (recorded deeds, mortgages and satisfactions) · Active for-sale listings
PLUTO 26v2, refreshed Oct 6, 2026. Written for people buying or selling this property. Not legal, tax, or appraisal advice. Confirm the details with the city before you offer or list.