Free Building Background Check

123 Guernsey Street

BROOKLYN, NY 11222 BBL 3026170034 13 units · 4 floors · 1928

Both historical records and our model suggest a low risk of maintenance failures in the coming year.

HPD violations vs. neighborhood
Class B/C violations on record vs. a typical building in Greenpoint
Above average
avg 3.7
5
Fewer violations More violations

This building has 5 recorded HPD violations, above the Greenpoint average of 3.7.

Rent & eviction protection

Is 123 Guernsey Street rent-stabilized?

Rent stabilization caps how much your rent can rise and protects your right to renew. Here's how this building scores on the four signals that usually point to it.

Built before 1974
Built 1928
6 or more units
13 units
Registered with RGB
Not found
421-A / J-51 abatement
None found
Potential rent stabilization. Building age and size suggest eligibility — confirm with the DHCR (Division of Housing and Community Renewal) or request a rent history.

Based on public NYC records. Not legal advice — verify with the DHCR (Division of Housing and Community Renewal) at apps.hcr.ny.gov.

Augrented Insights
AI summary · updated June 2026

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How we score buildings

How 123 Guernsey Street's risk score is calculated

We trained a model on 7 years of city inspection data — HPD violation filings, tenant complaints, and owner track records across their entire portfolio. It estimates the probability that HPD inspectors will find serious or dangerous violations at this address in the next 12 months. Lower % = safer.

What the score means for you

Neighborhood percentile
34th percentile

Out of 2348 buildings in this neighborhood, 798 have a higher predicted risk.

RiskiestSafest
Predicted violation outcome
71.3%
No serious
violations
23.5%
Some violations
(1–9)
5.2%
Many violations
(10+)
Risk factors

What's driving this score

These are the three data points that most influenced this building's score — ranked by how much weight the model placed on each one.

Number of apartments

The number of residential units affects how the model interprets complaint and violation totals — more units means more potential sources.

Building size

Total residential square footage — a proxy for building scale and the number of systems (plumbing, HVAC, etc.) that can fail.

Corporate ownership

Whether this building is registered to a corporate entity rather than an individual. Corporate owners tend to have distinct portfolio patterns.

Don't stop here — this is just the surface.

The full report adds 30+ data sets, complete violation history, landlord portfolio and court record. Or keep reading free:

What's in the 123 Guernsey Street report

Building characteristics
Total units13
Floors4
Year built1928
Gross area7,800 sq ft
Building class
Tax abatementNone
Issue trend & model projection

Violations & complaints per year — solid line is historical record, dashed line is AI projection.

Who's behind the building

123 Guernsey Street's landlord & ownership

The people and companies registered to this building, the other properties they run, and their court record. A landlord's wider portfolio is often the best predictor of how your building will be treated.

Corporate Owner

Registered contact for this building.

Name
Golonka Realty Inc
Address
123 Guernsey S 1a
Bklyn, NY 11222
Landlord portfolio

Other properties owned.

Portfolio data hidden

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What residents say

Reviews from 123 Guernsey Street tenants

Real experiences from people who have lived here. Share your honest feedback to help others make informed decisions.

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On the map

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The story over time

123 Guernsey Street event timeline

Violations, complaints, fines, and permits — the most recent records on file, in order.

2026
Bedbug Filing May 07
Bedbug report filed
0 infested · 0 eradicated
HPD Violation May 04
Class A violation

See all 21 events

Full history back to 2022 — violations, complaints, permits, bedbug filings, and more.

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Every record we have

Full data for 123 Guernsey Street apartments

30+ public city datasets for this address — searchable and sortable.

Side by side

How 123 Guernsey Street compares to the neighborhood

This building against comparable properties in Greenpoint. Toggle filters to narrow the peer group.

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Cancel anytime · Data sourced from NYC Open Data, HPD, DOB, DOF & the courts

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