How well maintained is this building?

There are 233 open HPD violations on record, including 35 Class C (the city's most serious category). That's higher than typical for the neighborhood (1 average per building).

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 137 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 South Slope is about $3,600/month for a one-bedroom.

307 12th Street

South Slope·Brooklyn

🔴1 Pest Alert

⚪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$3,6001-bed neighbourhood

Value—needs listing data

Violations35 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 1912
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
35 Class C (immediately hazardous)
Top complaint type at this building
37 heat complaints in past year
Significant issues across building data
See violation history below for details

How we pick these

Neighbourhood mapOpen in Google Maps

About this building

A 5-story building located in Park Slope, containing 25 residential units. Built in 1912.

Neighborhood

South Slope →

The neighborhood: South Slope

Brooklyn · 2,818 buildings tracked

Median asking rent: $3,600 1BR · $5,625 2BR

4th6thAvCulver

2 subway stations nearby

Full South Slope guide

Available Units

0 active

No past listings.

Past and off-market units will appear here when data is available.

Safety & Violations

Safety Record

233

Active Violations

Higher than typical for this neighborhood (233 vs 1 average per building).

Top issues

Water/Plumbing70
Structural53
Safety40

Severity Key

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

Show Critical Only (Class C)

Water/Plumbing
PROPERLY SECURE THE LOOSE WASHBASIN AND CABINET AT NORTH WALL, IN THE BATHROOM LOCATED AT APT 21, 5th STORY, 1st APARTMENT FROM EAST AT SOUTH
Jun 23, 2026Class C
Safety
C) MDL AND 28 RCNY §25-171: REPLACE OR REPAIR THE SELF-CLOSING DOORS THAT IS MISSING OR DEFECTIVE HINGES AT THE EAST ENTRANCE DOOR TO INNER COURT , AT PUBLIC HALL, 1st STORY
Jun 23, 2026Class C
Pests
ABATE THE INFESTATION CONSISTING OF ROACHES IN THE ENTIRE APARTMENT LOCATED AT APT 16, 4th STORY, 1st APARTMENT FROM SOUTH AT WEST
Jun 8, 2026Class C
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 16, 4th STORY, 1st APARTMENT FROM SOUTH AT WEST
Jun 8, 2026Class C
Safety
THE MISSING OR REPAIR/REPLACE THE DEFECTIVE WINDOW GUARD(S) IN ACCORDANCE WITH THE SPECIFICATIONS OF THE NEW YORK CITY HEALTH CODE SECTION 24 RCNY CHAPTER 12. WG TO INSTALL = 1; WG TO REPLACE = 0; WG TO REPAIR = 0; IN THE ENTIRE APARTMENT LOCATED AT APT 20, 4th STORY, 1st APARTMENT FROM SOUTH AT WEST
Apr 23, 2026Class 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.
1 Bed	—	$3,600	—
2 Bed	—	$5,625	—
3+ Bed	—	$6,400	—

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

307 12 ST LLC

Responsiveness Score

137days

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 233 open HPD violations on record, including 35 Class C (the city's most serious category). That's higher than typical for the neighborhood (1 average per building).
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 137 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 South Slope is about $3,600/month for a one-bedroom.

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