31 East 21st 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 1851
Things to Know
Real considerations before you sign
- Top complaint type at this building4 heat complaints in past year
About this building
A 5-story building located in Midtown South-Flatiron-Union Square, containing 18 residential units. Built in 1851.
The Building DNA
Building Services
Unit Perks
The neighborhood: Flatiron District
Manhattan · 274 buildings tracked
Median asking rent: $4,915 1BR · $9,000 2BR
2 subway stations nearby
1 park · 0.3 acres · incl. Worth 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
- Structural1
Severity Key
- Class C: Immediately Hazardous (Major)
- Class B: Hazardous (Moderate)
- Class A: Non-Hazardous (Minor)
- Structural
THE BROKEN OR DEFECTIVE PLASTERED SURFACES AND PAINT IN A UNIFORM COLOR AT CEILING AND ALL WALLS IN THE 1st ROOM FROM NORTH LOCATED AT APT 2C, 2nd STORY, 1st APARTMENT FROM WEST AT NORTH
Feb 14, 2019Class B
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 | — | $3,915.75 | — |
| 1 Bed | — | $4,915 | — |
| 2 Bed | — | $9,000 | — |
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
UNITED FLATIRON 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 is 1 open HPD violation on record, none in the city's most serious category (Class C).
- 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 2 noise complaints with 311 in the past year, about the neighborhood median of 2.
- How responsive is management to problems?
- Resolved violations at this building closed in about 569 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 Flatiron District is about $4,915/month for a one-bedroom.