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NYC Building Records · BBL 3026470029

101 NASSAU AVENUE

Brooklyn · Block 2647 · Lot 29 · Elevator + store (Class S5)

101 NASSAU AVENUE is a Class S5 (elevator + store) building in Brooklyn (BBL 3026470029) built in 1928, with 7 residential units across 4 floors.

The building is in NYC community district 301, council district 33, zoning district R6A, on a 1,944-square-foot lot with a building footprint of 5,800 square feet.

The current registered owner of record per NYC PLUTO is 101 NASSAU AVENUE LLC.

MetroDeeds shows no confirmed ACRIS deed transfer for this BBL in the last 5 years of recorded NYC public-records data.

The building is registered with NYC HPD's landlord-registration system and has no open HPD housing-maintenance code violations on record as of May 18, 2026.

Data sourced daily from NYC PLUTO (Department of City Planning), NYC ACRIS (Department of Finance), and NYC HPD housing-maintenance code violations.

Owner of record

101 NASSAU AVENUE LLC
HPD-registered head officer: THADDEUS MITKO

HPD registered contacts

People legally accountable to HPD for conditions at this building, in registration-priority order:
  • Head OfficerTHADDEUS MITKO
  • Corporate Owner101 NASSAU AVE LLC

Most recent deed

Last transferred on Dec 17, 2020 to 101 Nassau Avenue Llc.
Previous owner: Mitko, Sophie
Cash sale: no recorded mortgage tied to this transfer.
🔒 See all transfers before the 2020 sale →

Recent ACRIS documents (last 1)

DateTypeAmountParties
Dec 17, 2020DEEDNot disclosedParties redacted — full names in MetroDeeds Scout+
🔒 Reveal the redacted buyer/seller name above →

Building stats

Units
7
Year built
1928
Class
S5
Borough
Brooklyn
Zoning:
R6A
Lot size:
1,944 sqft
Building area:
5,800 sqft
Floors:
4
Assessed value:
$1.1M
Community district:
301
Council district:
33

HPD violations

0 open
Most severe class on record: Class C (immediately hazardous)
No open violations on record. Source: NYC HPD.
🔒 See every closed violation + inspection history →

Recent HPD violation details

Most recent 5 violations issued by NYC HPD at this address:
  • Class CInspected Jul 15, 2025
    § 27-2005, 2007 ADM CODE REMOVE DEVICE PREVENTING DOOR FROM BEING SELF-CLOSING CONSISTING OF PERMANENTLY INSTALLED HOOK AND EYE AT BUILDING…
  • Class CInspected Jul 15, 2025
    § 27-2005, 2007 ADM CODE REMOVE THE ILLEGAL FASTENING CONSISTING OF SIDE BOLT ARRANGED FOR PADLOCK INSTALLED AT 1ST AND 2ND WOOW GATES AT BU…
  • Class CInspected Jul 15, 2025
    § 27-2005, 2007 ADM CODE REMOVE DEVICE PREVENTING DOOR FROM BEING SELF-CLOSING CONSISTING OF PERMANENTLY INSTALLED HOOK AND EYE AT BUILDING…
  • Class AInspected Apr 11, 2024
    (A) § HMC:FILE ANNUAL BEDBUG REPORT IN ACCORDANCE WITH HPD RULE AS DESCRIBED ON THE BACK OF THIS NOTICE OF VIOLATION OR AS DESCRIBED ON HPD…
  • Class IInspected Nov 21, 2023
    §27-2107 ADM CODE OWNER FAILED TO FILE A VALID REGISTRATION STATEMENT WITH THE DEPARTMENT AS REQUIRED BY ADM CODE §27-2097 AND IS THEREFORE…
🔒 See closure dates + classification on archived violations →

Recent ACRIS activity

1 document in the last 5 years (most recent Dec 17, 2020).

Frequently asked questions about 101 NASSAU AVENUE

Who owns 101 NASSAU AVENUE?

The current registered owner of record for 101 NASSAU AVENUE per NYC PLUTO is 101 NASSAU AVENUE LLC. MetroDeeds shows no confirmed ACRIS deed transfer for this BBL in the last 5 years of recorded NYC public-records data.

When was 101 NASSAU AVENUE last sold?

MetroDeeds shows no confirmed ACRIS deed transfer for 101 NASSAU AVENUE in the last 5 years of recorded NYC public-records data. NYC ACRIS coverage extends back to 1966; an absence in our 5-year window typically means either the BBL has not transacted recently, or the most recent recorded document is not a DEED type (such as a refinance rather than a sale).

How many HPD violations does 101 NASSAU AVENUE have?

No open HPD housing-maintenance code violations are on record for 101 NASSAU AVENUE as of May 18, 2026. The building is registered with NYC HPD's landlord-registration system. HPD violation data is pulled daily from the NYC Open Data violations feed.

What is the assessed value of 101 NASSAU AVENUE?

NYC Department of Finance assesses 101 NASSAU AVENUE at $1.11M for the current tax year. NYC assesses property at a fraction of estimated market value (the assessment ratio varies by tax class — 6% for tax class 1 one-to-three-family dwellings, approximately 45% for tax class 2 rental apartment buildings), so the market value implied by this assessment is meaningfully higher. Assessment data is published by NYC Department of Finance.

What building class is 101 NASSAU AVENUE and what does that mean?

101 NASSAU AVENUE is NYC building class S5 — Elevator + store. An elevator apartment with one or more store units. Building class is assigned by NYC Department of Finance and recorded in PLUTO; it determines the property's tax class and the regulatory regime that applies.

More from MetroDeeds

Go deeper on this building

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