How well maintained is this building?

There are 42 open HPD violations on record, including 18 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 0 noise complaints with 311 in the past year — none on record for this building.

How responsive is management to problems?

Resolved violations at this building closed in about 243 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 Sea Gate is about $4,000/month for a one-bedroom.

3900 Neptune Avenue

Sea Gate·Brooklyn

🔴2 Pest Alerts

⚪Pre-War

Scroll for details

Violation & building data

Violation data updated Jul 1

Sources: NYC Department of Buildings, NYC Housing Preservation & Development +1 more

Building overview

Area Avg$4,0001-bed neighbourhood

Value—needs listing data

Violations18 critical

BuildingWalk-up

Data as of Jul 1, 2026

Building Quality

How is this calculated?

0.0/ 10Significant Issues

Based on open violations, 311 complaint patterns, and amenities.

Unit Value

How is this calculated?

Limited data — verify with a tour.

Compared to typical rent for this neighborhood and bedroom count.

Highlights

What's great about this place

Pre-war character
Built in 1925
Quieter than average for the neighborhood
0 noise complaints in past year (vs 1 median)

Things to Know

Real considerations before you sign

Open critical violations
18 Class C (immediately hazardous)
Significant issues across building data
See violation history below for details

How we pick these

Neighbourhood mapOpen in Google Maps

About this building

A 2-story building located in Coney Island-Sea Gate, containing 3 residential units. Built in 1925.

Neighborhood

Sea Gate →

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

Lead Paint13
Structural10
Water/Plumbing5

Severity Key

Class C: Immediately Hazardous (Major)
Class B: Hazardous (Moderate)
Class A: Non-Hazardous (Minor)

Show Critical Only (Class C)

Electrical
HMC: PROVIDE A SAFE AND ADEQUATE SUPPLY OF ELECTRIC SERVICE TO THE FIXTURES .. IN THE ENTIRE APARTMENT LOCATED AT APT 2R, 2nd STORY, 1st APARTMENT FROM EAST AT SOUTH
Dec 26, 2017Class C
Water/Plumbing
THE FLUSHING APPARATUS AND MAINTAIN SAME SO AS TO FLUSH EFFECTIVELY THE WATER CLOSET .. IN THE BATHROOM LOCATED AT APT 2R, 2nd STORY, 1st APARTMENT FROM EAST AT SOUTH
Dec 26, 2017Class C
General
M/D LAW ABATE THE NUISANCE CONSISTING OF EXTENSION CORDS LOCATED AT APT 2R, 2nd STORY, 1st APARTMENT FROM EAST AT SOUTH
Dec 26, 2017Class C
Lead Paint
CORRECT THE LEAD-BASED PAINT HAZARD - PAINT THAT TESTED POSITIVE FOR LEAD CONTENT AND THAT IS PEELING OR ON A DETERIORATED SUBSURFACE - USING WORK PRACTICES SET FORTH IN 28 RCNY §11-06(B)(2) CEILING, 1st DOOR FRAME FROM NORTH AT EAST WALL, 1st WINDOW FRAME FROM SOUTH AT WEST WALL IN THE BATHROOM LOCATED AT APT 2R, 2nd STORY, 1st APARTMENT FROM EAST AT SOUTH
Dec 26, 2017Class C
Lead Paint
CORRECT THE LEAD-BASED PAINT HAZARD - PAINT THAT TESTED POSITIVE FOR LEAD CONTENT AND THAT IS PEELING OR ON A DETERIORATED SUBSURFACE - USING WORK PRACTICES SET FORTH IN 28 RCNY §11-06(B)(2) BASEBOARD AT EAST WALL, BASEBOARD AT WEST WALL, 2nd CLOSET FROM WEST AT NORTH WALL CEILING, 2nd CLOSET FROM WEST AT NORTH WALL WALL, 1st DOOR FRAME FROM EAST AT SOUTH WALL, 1st DOOR FRAME FROM SOUTH AT WEST WALL, NORTH WALL, SOUTH WALL, EAST WALL, WEST WALL, 1st WINDOW FRAME FROM NORTH AT EAST WALL IN THE 2nd ROOM FROM NORTH AT EAST LOCATED AT APT 2R, 2nd STORY, 1st APARTMENT FROM EAST AT SOUTH
Dec 26, 2017Class C

Market Value Estimate

Statistical estimate based on publicly available listing data. Not an appraisal. See disclaimer.Market data as of Jul 1, 2026.

Comp Matrix

Unit Type	This Bldg	Area Avg	Diff.
Studio	—	$3,507.5	—
1 Bed	—	$4,000	—
2 Bed	—	$5,000	—
3+ Bed	—	$4,400	—

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

HARFENES, RACHEL

Responsiveness Score

243days

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 42 open HPD violations on record, including 18 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 0 noise complaints with 311 in the past year — none on record for this building.
How responsive is management to problems?: Resolved violations at this building closed in about 243 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 Sea Gate is about $4,000/month for a one-bedroom.

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