849a Union Street
Building overview
Data as of Jul 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
- Pre-war characterBuilt in 1920
- Quieter than average for the neighborhood0 noise complaints in past year (vs 1 median)
Things to Know
Real considerations before you sign
- Open critical violations1 Class C (immediately hazardous)
- Significant issues across building dataSee violation history below for details
About this building
A 5-story building located in Park Slope, containing 14 residential units. Built in 1920.
The neighborhood: Park Slope
Brooklyn · 3,806 buildings tracked
Median asking rent: $4,048 1BR · $6,800 2BR
4 subway stations nearby
1 park · 0.2 acres · incl. Gardens Of Union
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
- Mold1
- Pests1
- Safety1
Severity Key
- Class C: Immediately Hazardous (Major)
- Class B: Hazardous (Moderate)
- Class A: Non-Hazardous (Minor)
- Heat/Hot Water
POST NOTICE, IN FORM APPROVED BY THE DEPARTMENT, STATING THE NAME AND LOCATION OF THE PERSON DESIGNATED BY THE OWNER TO HAVE KEY TO BUILDINGS HEATING SYSTEM MISSING AT PUBLIC HALL, 1st STORY
Mar 1, 2021Class C - Mold
THE SOURCE AND ABATE THE VISIBLE MOLD CONDITION... AT BOTTOM OF UPPER CLOSET (APPROX. 1 SQ FT.) AT NORTH WALL IN THE FOYER LOCATED AT APT 1, 2nd STORY, 1st APARTMENT FROM NORTH AT EAST ORIGINAL VIOLATION 14042456 ISSUED 25-FEB-21 HAS BEEN UPGRADED TO CLASS B PER ADMINISTRATIVE CODE §27-2017.3a(3)(a) or (b).
Jun 29, 2021Class B - Rubbish
ADM CODE REMOVE ALL ENCUMBRANCES CONSISTING OF BICYCLES AND HOUSEHOLD ITEMS AT 1ST STORY PUBLIC HALL
Oct 9, 2008Class B - Pests
A) § HMC:FILE ANNUAL BEDBUG REPORT IN ACCORDANCE WITH HPD RULE AS DESCRIBED ON THE BACK OF THIS NOTICE OF VIOLATION OR AS DESCRIBED ON HPDS WEBSITE, WWW.NYC.GOV\HPD, SEARCH BED BUGS.
Apr 30, 2026Class A - Safety
POST A PROPER NOTICE OF SMOKE DETECTOR REQUIREMENTS, IN A FORM APPROVED BY THE COMMISSIONER, AT OR NEAR THE MAIL BOX MISSING AT PUBLIC HALL, 1st STORY
Mar 1, 2021Class A
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 | — | $3,095 | — |
| 1 Bed | — | $4,047.5 | — |
| 2 Bed | — | $6,800 | — |
| 3+ Bed | — | $6,574.5 | — |
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
92 SEVENTH AVENUE 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 5 open HPD violations on record, including 1 Class C (the city's most serious category).
- 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 145 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 Park Slope is about $4,048/month for a one-bedroom.