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51 South Portland Ave

Brooklyn, NY 11217Individually ownedBBL 3021000008BIN 3058862
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16 sources

Year Built1866
Floors3
Units3
Building Area4,248 sqft
ZoningR6B
ClassC0
Market Value$5.3M

51 SOUTH PORTLAND AVE is a property located at 51 SOUTH PORTLAND AVE, Brooklyn, NY 11217. It is classified as a walk-up apartment - three families. The building was constructed in 1866. It has 3 floors and 3 units. The building area is 4,248 square feet on a 2,200 sqft lot. The property is zoned R6B. The assessed market value is $5.3M. It last sold for $5.2M on May 8, 2025. Public records list the property as individually owned. There are 23 building permits on record (16 active). There are 1 violation on record (1 currently open). Data sourced from NYC Department of Buildings (DOB), Housing Preservation & Development (HPD), Department of Finance (DOF), and other government agencies.

A RegWatch Dossier

131records on file

Completed in 1866, 51 South Portland Ave rises 3 stories over Kings. Public records put it at 3 units and 4,248 square feet of floor area, on land zoned R6B. It is carried on the public rolls at a market value of $5.3M, and assessed for tax at $320K. In the 59 years its record reaches back, the lot has drawn 131 separate government filings.

The documentary life of the address leans hard toward complaint: 43 of its 131 records, fully 33%, fall under that one heading. Permit (23) and mortgage (22) trail well behind. 1 violation stands open against it today.

The pace is anything but even. The early decades pass in near silence; the filings cluster heavily in recent years, peaking in 2026.

Read together — 33% complaint, 59 years of accumulation, a parcel of Kings — these scattered records compose a portrait of the address that no single page sets out to draw.

$5.3M of Kings, written across 131 government filings.

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Executive summary, compliance history, title chain & existing debt, recorded documents & agreements, owner contacts, tax detail, Use & Development, build envelope, market comps, investment metrics, deal math & stress tests, deal signals, pre-foreclosure signals, neighborhood. Downloadable PDF. One payment, no subscription.

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Sources
NYC DOBNYC HPDNYC DOFACRISNYC DCPECB/OATHNYC DEPNYC LPCNYC FDNYNYS DHCRMOCEJFEMAEPAUS CensusHUDUSGS
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Property Details

Address51 SOUTH PORTLAND AVE, Brooklyn, NY 11217
Building TypeWalk-Up Apartment - Three Families
C0
Year Built1866
Floors3
Total Units3
Building Area4,248 sqft
Lot Size2,200 sqft
ZoningR6B
ConditionAverage
3021000008
3058862
OwnershipIndividually owned

Assessment & Sales

$5.3M
$320K
$18K
$5.2M
Last Sale DateMay 8, 2025

Building Permits

23 on record · 16 active
General ConstructionDOB NOW
SIGNED-OFF
Filed Jul 6, 2026Est. cost $20KJob #B01418349-I1

Initial Permit

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General ConstructionDOB NOW
PERMIT ENTIRE
Filed Jul 6, 2026Est. cost $20KJob #B01418349-I1
View this permit's full record & inspection history →
Minor WorkDOB NOW
AHV PERMIT ISSUED
Filed Jun 13, 2026Job #B2357355
View this permit's full record & inspection history →
General ConstructionDOB NOW
PERMIT ISSUED
Filed May 27, 2026Est. cost $435KJob #B01326508-I1

Renewal Permit Without Changes

View this permit's full record & inspection history →
General ConstructionDOB NOW
PERMIT ENTIRE
Filed May 27, 2026Est. cost $435KJob #B01326508-I1
View this permit's full record & inspection history →

+ 18 more permits — view full report

Violations

1 on record · 1 open
ECBConstruction
ACTIVE
Issued Aug 22, 2026#39201455K

WORK AFTER HOURS WITHOUT A VARIANCE PERMIT CONTRARY TO 28-105.12.5. AT TIME OF INSPECTION OBSERVED 4 WORKER, WORK IN PROGRESS, JOB# B01326508 WITH NO VARIANCE PERMIT PULLED., OBTAIN AFTER HOURS VARIANCE

View this violation's full details & status history →

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Title history, detailed tax records, environmental data, zoning analysis, and more from 250+ government sources.

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Frequently Asked Questions

When was 51 SOUTH PORTLAND AVE, Brooklyn built?

The building at 51 SOUTH PORTLAND AVE, Brooklyn, NY 11217 was constructed in 1866. It is classified as a walk-up apartment - three families with 3 floors and 3 units. The building area is 4,248 sqft.

Are there building permits at 51 SOUTH PORTLAND AVE, Brooklyn?

Yes. 51 SOUTH PORTLAND AVE, Brooklyn, NY 11217 has 23 building permits on record, with 16 currently active. Permits are sourced from the NYC Department of Buildings (DOB Legacy and DOB NOW systems). The most recent permit is a General Construction (SIGNED-OFF) filed Jul 6, 2026.

Does 51 SOUTH PORTLAND AVE, Brooklyn have violations?

Yes. 51 SOUTH PORTLAND AVE, Brooklyn, NY 11217 has 1 violation on record, with 1 currently open. Breakdown: 1 ECB. Sources: NYC DOB, HPD, and ECB/OATH.

Does 51 SOUTH PORTLAND AVE, Brooklyn have docketed judgments?

No docketed OATH judgments were found in local records for 51 SOUTH PORTLAND AVE, Brooklyn, NY 11217. Judgment data is sourced from NYC Office of Administrative Trials & Hearings (OATH) hearing records.

What is the property tax assessment for 51 SOUTH PORTLAND AVE?

51 SOUTH PORTLAND AVE, Brooklyn, NY 11217 has an assessed market value of $5.3M and a total assessed value of $320K (land: $18K). Assessment data is from the NYC Department of Finance (DOF).

When was 51 SOUTH PORTLAND AVE last sold?

51 SOUTH PORTLAND AVE, Brooklyn, NY 11217 last sold for $5.2M on May 8, 2025. Sale records are sourced from NYC ACRIS and Department of Finance rolling sales data.

What is the zoning for 51 SOUTH PORTLAND AVE?

51 SOUTH PORTLAND AVE, Brooklyn, NY 11217 is zoned R6B. Zoning data is from the NYC Department of City Planning (DCP). For detailed FAR, overlays, and development rights, view the full property report on RegWatch.

Who owns 51 SOUTH PORTLAND AVE?

51 SOUTH PORTLAND AVE, Brooklyn, NY 11217 is individually owned according to public records. Ownership data is from NYC Department of Finance assessment rolls. View the current owner of record and registered contacts in the full property report on RegWatch.

How do I get a full property report for 51 SOUTH PORTLAND AVE?

Search 51 SOUTH PORTLAND AVE on RegWatch to see its public record free — violations, permits, tax records, zoning, environmental data, and more from 250+ government sources, no credit card required. A Full Analysis report ($15, one-time) adds the complete title history, owner contacts, and a downloadable PDF.

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51 SOUTH PORTLAND AVE, Brooklyn, NY 11217 — Property Records, Permits, Violations, Tax & Zoning | RegWatch