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Property overview

423 56 Street

Brooklyn, NY 11220

Who owns 423 56 Street, what the county and city have on record, and a measured sell-signal score — every fact dated and sourced.

Owner of recordKwok, Chun KiuMailing address: not published by the CityObserved Sep 19, 2026 · NYC Department of City Planning ZoLa (MapPLUTO)
Parcel 3008310069 · Public research profile
Motivated Seller IndexDRAFT MODEL
97/100
About 9.5 in 100 homes with these signals sold within four months (8.9× the New York City rate)100% of model checks have usable evidence

A measured sell-signal score from public records: 5 positive signals observed. It is a base rate for homes like this, not a statement about this owner. How it works ↓

Aerial 2024 with parcel boundary · NYC OTI
Assessed value$96,300 total (land $16,380); tax class 1 is assessed at 6% of market value
Tax statusUnverified
Ownership tenureUnverified
Property typeMiscellaneous two-family (DOF class B9), 2 floors, 2 residential units

THE INDEX

Why this MSI reads 97

Draft model

7 of 22 checked public signals observed, covering 100% of the model. The score is public; the signal-by-signal reasons, source documents, and owner details are in LienSuite.

Method and limits. MSI v0.2-nyc-2026-09 weights twenty-two public signals by how much each one changed the recorded four-month arm’s-length sale rate across all 636,000 privately owned one- to three-family lots in the five boroughs, checked on a holdout the model never saw (the top 0.5% of homes by score sold at 5.7x the citywide rate, the top 1% at 4.1x). Owner mailing addresses are not public in New York City, so absentee and out-of-state ownership are not part of this model.: new-building permit +27, trade permit +18, lien-sale notice (water/sewer) +13, lien-sale notice (property tax) +12, demolition permit +12, bought since 2024 +9, heat / hot-water violation +9, unsanitary / dirty / rodent complaint +8, hpd class b violation +6, construction / plumbing complaint +6, late-stage lien notice (30- or 10-day) +6, general-construction permit +4, star exemption (owner-occupied) +4, maintenance complaint +3, hpd class c violation +2, two or three units -3, structural violation -4, vermin / garbage violation -7, sidewalk shed / scaffold / fence permit -9, solar permit -12, structural / safety complaint -12, permit valued at $50,000 or more -14. The "in 100 homes" figure is the model's fitted probability for this combination of signals. It describes homes like this one in aggregate; it is not a claim about this owner's intentions, and it is not LienSuite's paid deal score.

THE RECORD

Property details

Dated sources
Property type
Miscellaneous two-family (DOF class B9), 2 floors, 2 residential units
Observed Sep 19, 2026 · NYC Department of City Planning ZoLa (MapPLUTO)
Owner of record
Kwok, Chun Kiu (mailing address not published by the City)
Observed Sep 19, 2026 · NYC Department of City Planning ZoLa (MapPLUTO)
Assessed value
$96,300 total (land $16,380); tax class 1 is assessed at 6% of market value
Observed Sep 19, 2026 · NYC Department of Finance property records
STAR exemption
None on file for tax year 2026
Observed Sep 19, 2026 · DOF property exemption detail (NYC Open Data)
Building area
2,880 sq ft (1,920 residential)
Observed Sep 19, 2026 · NYC Department of City Planning ZoLa (MapPLUTO)
Lot size
2,003 sq ft
Observed Sep 19, 2026 · NYC Department of City Planning ZoLa (MapPLUTO)
Year built
1900
Observed Sep 19, 2026 · NYC Department of City Planning ZoLa (MapPLUTO)
Last recorded sale
$1,580,000, January 21, 2026
Observed Sep 19, 2026 · DOF annualized and rolling property sales (NYC Open Data)
Building permits
3 DOB permits in the last 12 months: general construction (supersede bis a1 job #310170052, restore back to prior legal 2-family house. ren) issued March 11, 2026; plumbing (supersede bis a1 job #310170052, restore back to prior legal 2-family house.reno) issued March 16, 2026; mechanical systems (supersede bis a1 job #310170052, restore back to prior legal 2-familyhouse. reno) issued September 3, 2026
Observed Sep 19, 2026 · DOB NOW approved permits (NYC Open Data)
311 requests
1 in the last 12 months: general construction/plumbing (1)
Observed Sep 19, 2026 · NYC 311 service requests (NYC Open Data)

Parcel reference: 3008310069. Facts reflect the listed observation dates and may have changed since then.

OWNERSHIP AND TAXES

Research snapshot

Observed tax balanceNot verified
Delinquency periodNot verified
Last recorded transferNot connected
Transfer amountNot connected

Source details not yet connected. A tax balance is not proof that a property is for sale.

CHANGES OVER TIME

Property timeline

  1. Permit: Mechanical Systems

    SUPERSEDE BIS A1 JOB #310170052, RESTORE BACK TO PRIOR LEGAL 2-FAMILYHOUSE. RENOVATION OF EXISTING CELLAR, BASEMENT, 1ST AND 2ND FLOOR WITH MECHANICAL WORK: NEW BATHROOM VENTILATION AS PER PLAN; NO CHANGE INUSE, EGRESS OR OCCUPANCY UNDER THIS APPLICATION..

    DOB NOW approved permits (NYC Open Data) · checked Sep 19, 2026
  2. 311: General Construction/Plumbing

    Cons - Contrary/Beyond Approved Plans/Permits, status Closed.

    NYC 311 service requests (NYC Open Data) · checked Sep 19, 2026
  3. Permit: Plumbing

    SUPERSEDE BIS A1 JOB #310170052, RESTORE BACK TO PRIOR LEGAL 2-FAMILY HOUSE.RENOVATION OF EXISTING CELLAR, BASEMENT, 1ST AND 2ND FLOOR WITH PLUMBING WORK: RELOCATE KITCHEN AND BATHROOM FIXTURES; NEW 2-PC RESTROOM AND HOT WATER HEATERS IN CELLAR; NEW SLOP.

    DOB NOW approved permits (NYC Open Data) · checked Sep 19, 2026
  4. Permit: General Construction

    SUPERSEDE BIS A1 JOB #310170052, RESTORE BACK TO PRIOR LEGAL 2-FAMILY HOUSE. RENOVATION OF EXISTING CELLAR, BASEMENT, 1ST AND 2ND FLOOR WITH GENERAL CONSTRUCTION: NEW PARTITIONS, DOORS, FLOORING AND COSMETIC WORK; NO CHANGE IN USE, EGRESS OR OCCUPANCY UND.

    DOB NOW approved permits (NYC Open Data) · checked Sep 19, 2026
  5. Recorded sale

    $1,580,000.

    DOF annualized and rolling property sales (NYC Open Data) · checked Sep 19, 2026

NEARBY

More records nearby

Facts on this page reflect their observation dates. Confirm the parcel and current records with the county before acting.