Free Building Background Check

321 Sumpter Street

BROOKLYN, NY 11233 BBL 3015210054 5 units · 3 floors · 1907

While historically clean, our model detects a rising risk of severe maintenance issues in the next 12 months.

HPD violations vs. neighborhood
Class B/C violations on record vs. a typical building in Bedford-Stuyvesant
At or below average
avg 13.5
2
Fewer violations More violations

This building has 2 recorded HPD violations, at or below the Bedford-Stuyvesant average of 13.5.

Rent & eviction protection

Is 321 Sumpter 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 1907
6 or more units
5 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

321 Sumpter Street is a three-story, 6-unit New Law Tenement building located in Bedford-Stuyvesant, constructed in 1907 and currently owned by Machull Redevelopment Associates L P. The building has experienced several significant safety and maintenance issues over the past five years, particularly in 2021 when multiple violations were recorded, including problems with self-closing doors in the vestibule and basement, deficiencies with the roof bulkhead doors, and a defective fire escape ladder. A mouse infestation in apartment 2B was documented in 2019, though all these violations have since been closed. The most recent maintenance activity involved a door-related complaint in 2023, which was investigated by the Department of Housing Preservation and Development but resulted in no violations being issued.

Despite these past issues, more recent building conditions show improvement, particularly regarding pest control. 321 Sumpter Street has maintained an exemplary record in terms of bedbug management, with zero reported infestations over the past five filing periods from 2020 to 2025, and the most recent rodent inspections in 2023 and 2024 resulted in passing grades. The building is currently in compliance with all relevant housing maintenance codes, with the most recent bedbug report filing in January 2025 showing no infested or re-infested units, suggesting effective ongoing management of pest control measures.

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How we score buildings

How 321 Sumpter 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
29th percentile

Out of 7141 buildings in this neighborhood, 2071 have a higher predicted risk.

RiskiestSafest
Predicted violation outcome
42.9%
No serious
violations
44.7%
Some violations
(1–9)
12.3%
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.

Tenant HPD complaints (past 7 years)

Formal complaints tenants filed with HPD about this address over the last 7 years.

311 call rate, landlord's portfolio

Average 311 housing complaints per building across everything this landlord owns.

Building size

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

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 321 Sumpter Street report

Building characteristics
Total units5
Floors3
Year built1907
Gross area5,400 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

321 Sumpter 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.

Owner

Registered contact for this building.

Name
Machull Redevelopment Associates L.p.
Landlord portfolio

Other properties owned.

Portfolio data hidden

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What residents say

Reviews from 321 Sumpter Street tenants

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On the map

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The story over time

321 Sumpter Street event timeline

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

2026
Bedbug Filing Jan 09
Bedbug report filed
0 infested · 0 eradicated

See all 10 events

Full history back to 2021 — violations, complaints, permits, bedbug filings, and more.

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Every record we have

Full data for 321 Sumpter Street apartments

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Side by side

How 321 Sumpter Street compares to the neighborhood

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

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