You've used all your free reports this month. Create a free account to keep checking buildings.
Create free account Log in
Free Building Background Check

4124 Avenue D

BROOKLYN, NY 11203 BBL 3049750010 2 units · 2 floors · 1933

Create a free account to view the full analysis for this building and 3414 others nearby.

HPD violations vs. neighborhood
Class B/C violations on record vs. a typical building in East Flatbush
? vs. avg
Fewer violations More violations

Sign in to see how this building compares to others in East Flatbush.

Rent & eviction protection

Is 4124 Avenue D 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 1933
6 or more units
2 units
Registered with RGB
Not found
421-A / J-51 abatement
None found
Likely not rent stabilized. This building doesn't show the typical signals — but confirm with the DHCR (Division of Housing and Community Renewal) if you suspect otherwise.

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

The two-family residential building at 4124 Avenue D in East Flatbush, owned by Lancelot Offendel, was constructed in 1933 and stands two stories tall. The property has two active Department of Buildings violations related to safety compliance, with the most recent occurring in June 2023 for failure to file the 2018 external low pressure inspection, and a previous violation from November 2019 regarding the non-filing of the 2017 annual boiler inspection report. Both of these violations remain unresolved as of July 2025, which may suggest ongoing issues with the property's maintenance of required safety inspections. In a separate inspection conducted in March 2019, the building passed a rodent inspection, providing some assurance regarding pest control prior to the more recent violations occurring.

Create a free account to read the full AI summary and unlock the complete report.
How we score buildings

How 4124 Avenue D'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
91th percentile

Out of 3414 buildings in this neighborhood, 3107 have a higher predicted risk.

RiskiestSafest
Predicted violation outcome
84.3%
No serious
violations
12.9%
Some violations
(1–9)
2.8%
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.

Neighborhood location

The model uses precise location as a proxy for neighborhood-level risk patterns — some blocks have systematically higher violation rates.

Neighborhood (ZIP code)

The ZIP code captures local housing market conditions and enforcement patterns that affect all buildings in the area.

Building code violation rate, property manager's portfolio

Per-building DOB violation rate across the property manager's portfolio.

Building characteristics
Total units2
Floors2
Year built1933
Gross area1,300 sq ft
Building class
Tax abatementNone
Issue trend & model projection

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

Multiple entrances & addresses

Included addresses

All street addresses that share this building's BBL and are covered by this report.

4124 Avenue D, New York, NY 11203
558 East 42nd St, New York, NY 11203
560 East 42nd St, New York, NY 11203
562 East 42nd St, New York, NY 11203
566 East 42nd St, New York, NY 11203
Who's behind the building

4124 Avenue D'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.

Individual Owner

Registered contact for this building.

Name
Lancelot Offendel
Address
975 Jerome St
Baldwin, NY 11510
Landlord portfolio

Other properties owned.

Portfolio data hidden

We found 1 other property owned by this landlord. Unlock the report to see their addresses and risk grades.

Unlock full landlord report
What residents say

Reviews from 4124 Avenue D tenants

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

Share your experience — Help other renters by leaving an honest review

Loading reviews…

On the map

Compare nearby alternatives

This building and nearby alternatives, color-coded by risk level. Click any marker to explore.

Buildings nearby
Loading…

You've reached your free report limit

Create a free account to view 5 buildings a month — no credit card needed.

Create free account Log in

Or see paid plans for unlimited access

Watch 4124 Avenue D
Get an email the moment a new violation or complaint is filed.