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51 South Portland Ave

Brooklyn, NY 11217Individually ownedBBL 3021000008BIN 3058862

Updated Aug 1, 2026 · 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 15 building permits on record (11 active). Data sourced from NYC Department of Buildings (DOB), Housing Preservation & Development (HPD), Department of Finance (DOF), and other government agencies.

A RegWatch Dossier

110records 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 58 years its record reaches back, the lot has drawn 110 separate government filings.

The documentary life of the address leans hard toward complaint: 35 of its 110 records, fully 32%, fall under that one heading. Mortgage (22) and release (17) trail well behind. No violations stand 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 — 32% complaint, 58 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 110 government filings.

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

15 on record · 11 active
General ConstructionDOB NOW
PERMIT ISSUED
Filed Jul 6, 2026Est. cost $20KJob #B01418349-I1
General ConstructionDOB NOW
PERMIT ENTIRE
Filed Jul 6, 2026Est. cost $20KJob #B01418349-I1
General ConstructionDOB NOW
PERMIT ISSUED
Filed May 27, 2026Est. cost $435KJob #B01326508-I1
General ConstructionDOB NOW
PERMIT ENTIRE
Filed May 27, 2026Est. cost $435KJob #B01326508-I1
SprinklerDOB NOW
PERMIT ISSUED
Filed Mar 2, 2026Est. cost $76KJob #B01326508-S3

+ 10 more permitsview full report

Violations

none on record

No violations found in local records.

Get the Complete Report for 51 SOUTH PORTLAND AVE

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 15 building permits on record, with 11 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 (PERMIT ISSUED) filed Jul 6, 2026.

Does 51 SOUTH PORTLAND AVE, Brooklyn have violations?

No violations were found in local records for 51 SOUTH PORTLAND AVE, Brooklyn, NY 11217. Violation data is sourced from DOB (safety and legacy), HPD (housing), and ECB (environmental control).

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 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