31 East 21st Street
Manhattan · Midtown South-Flatiron-Union Square, NY 10010
31 East 21st Street is an 18-apartment building in Midtown South-Flatiron-Union Square, built in 1851, managed by United Flatiron LLC. The City has 1 open housing-code violation on file for it, about 0.06 per apartment, in a neighborhood where most buildings have none on record (HPD, as of 5 October 2026). Tenants filed 4 complaints with 311 in the past year, which the City closed in a median of 3 days (311, as of 5 October 2026). No tenant has reviewed it here yet. Everything above comes from the City's own records.
Managed by United Flatiron LLC
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- Units
- 18
- Year built
- 1851
- Neighborhood
- Midtown South-Flatiron-Union Square
- Borough
- Manhattan
This building’s record with the City
Complaints tenants filed with 311, and repairs a City inspector has asked for. Most repairs are routine maintenance. Both describe the building rather than the people in it, and often predate the current management.
Problems here get fixed quickly, a median of 3 days from complaint to close, faster than the 4-day neighborhood median.
4tenant complaints
Filed with 311 in the past year · 5 the year before
1open repair
Outstanding with HPD
- Immediately hazardous
- 0
- Hazardous
- 1
- Non-hazardous
- 0
What the open repairs are about
- Stairs, floors and ceilings1
Source: NYC 311 and Housing Preservation & Development. Look this building up · updated Oct 2026
What tenants say
Nobody has written about 31 East 21st Street yet.
Does the heat hold in January? How long does the super take? Does management answer the phone, and were you charged what you expected? No public record answers any of that. Only someone who lived here can.
Be the first to reviewAbout a minute, no account, stays anonymous.