4124th Avenue K
Building overview
Data as of Oct 1, 2026
Based on open violations, 311 complaint patterns, and amenities.
Compared to typical rent for this neighborhood and bedroom count.
Highlights
What's great about this place
Limited highlights data — verify with a tour.
Things to Know
Real considerations before you sign
- Open critical violations84 Class C (immediately hazardous)
- Top complaint type at this building82 heat complaints in past year
- Higher noise than typical for the neighborhood34 noise complaints in past year (vs 1 median)
About this building
A 6-story building located in Flatlands, containing 108 residential units. Built in 1955.
The neighborhood: Flatlands
Brooklyn · 15,382 buildings tracked
Median asking rent: $2,711 1BR · $3,254 2BR
5 parks · 1.6 acres · incl. Fraser Square
Available Units
0 active
No past listings.
Past and off-market units will appear here when data is available.
Safety & Violations
Safety Record
Active Violations
Open HPD violations on record for this building.
Top issues
- Pests63
- Water/Plumbing60
- Safety56
Severity Key
- Class C: Immediately Hazardous (Major)
- Class B: Hazardous (Moderate)
- Class A: Non-Hazardous (Minor)
- Safety
C) MDL AND 28 RCNY §25-171: REPLACE OR REPAIR THE SELF-CLOSING DOORS THAT IS MISSING OR DEFECTIVE HINGES IN THE ENTRANCE LOCATED AT APT 5J, 5th STORY, 1st APARTMENT FROM WEST AT NORTH
Sep 22, 2026Class C - Safety
C) MDL AND 28 RCNY §25-171: REPLACE OR REPAIR THE SELF-CLOSING DOORS THAT IS MISSING OR DEFECTIVE LATCH SET AT DOOR TO BUILDING ENTRANCE , 1st STORY
Sep 21, 2026Class C - Safety
C) MDL AND 28 RCNY §25-171: REPLACE OR REPAIR THE SELF-CLOSING DOORS THAT IS MISSING OR DEFECTIVE LATCH AT VESTIBULE
Sep 3, 2026Class C - Safety
C) MDL AND 28 RCNY §25-171: REPLACE OR REPAIR THE SELF-CLOSING DOORS THAT IS MISSING OR DEFECTIVE LATCH SET AT BULKHEAD , 6th STORY, SECTION AT SOUTH
Sep 2, 2026Class C - Safety
C) MDL AND 28 RCNY §25-171: REPLACE OR REPAIR THE SELF-CLOSING DOORS THAT IS MISSING OR DEFECTIVE LATCH SET AT VESTIBULE AT BASEMENT
Sep 2, 2026Class C
Market Value Estimate
Statistical estimate based on publicly available listing data. Not an appraisal. See disclaimer.Market data as of Oct 1, 2026.
Comp Matrix
| Unit Type | This Bldg | Area Avg | Diff. |
|---|---|---|---|
| Studio | — | $2,414 | — |
| 1 Bed | — | $2,711 | — |
| 2 Bed | — | $3,254 | — |
| 3+ Bed | — | $3,450 | — |
Value Verdict
Insufficient listing or market data to compute a verdict for this building.
Rent vs. Buy Analysis
No listing data available to estimate rent vs. buy.
Management & Operations
Management & Performance
Owner/Operator
KF 4200 AVENUE K EQUITIES, LLC
Responsiveness Score
Average time to resolve violations
Slower than NYC average (45 days)
We haven't verified this building's policies yet. Pet, utility, and leasing details appear here once we've reviewed the management company's official site — we only show policies we can source, never assumptions.
Living here — quick answers
Every answer comes from public records for this specific building — we skip questions we can't answer with data.
- How well maintained is this building?
- There are 320 open HPD violations on record, including 84 Class C (the city's most serious category).
- Is this building rent-stabilized?
- Yes — this building appears on the DHCR rent-stabilized building list. Ask the landlord to confirm whether a specific apartment is stabilized.
- How noisy is this building?
- Neighbors filed 34 noise complaints with 311 in the past year, above the neighborhood median of 1 among buildings with any noise complaints.
- How responsive is management to problems?
- Resolved violations at this building closed in about 393 days on average (NYC average is roughly 45 days). Open items are listed in the Safety & Violations section above.
- What does it cost to live here?
- We don't have current listings for this building. Typical asking rent in Flatlands is about $2,711/month for a one-bedroom.