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311 complaints routed to HPD or DOB turn into violations in days — often without the owner knowing.
NYC 311 · real-time
311 · Detection engine
NYC 311 violation monitoring, before the fine.
Look up 311 complaints by address in NYC, then keep monitoring. Every 311 complaint is where a future NYC violation starts — catch it before it converts to an HPD or DOB fine.
Live scan
Every few minutes
3.4M+
2024 volume
~15 min
Alert latency
app.violationwatch.nyc
— The 30-second answer
To look up 311 complaints on a NYC building, search its address — every complaint routed to HPD, DOB, DEP, Sanitation, or Health appears with its status and recurrence count. Complaints have no fines, but they are where violations start: most convert within days if the condition isn't cured.
The problem
Why 311 monitoring is hard to do manually.
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Manual 311 checking requires an exact BBL or BIN — and no one owns that habit.
03 / 03
Repeat complaints signal pattern issues that flag you for targeted enforcement.
What we detect
Every signal our engine surfaces for 311.
Our detection engine fuses filings, inspection outcomes, complaint routing, and derivative signals into one feed. Public records are one input among many — never the ceiling.
- Every 311 complaint at your BIN
- Agency routing (HPD, DOB, DEP, Sanitation)
- Complaint → inspection → violation chain
- Anonymous complainant counts and recurrence
- Open vs resolved status
- Time-to-inspection tracking
- Tenant harassment pattern signals
- Borough & zip-code complaint trends
3.4M+
311 service requests received citywide in 2024
ViolationWatch detects every one of them
Classes & fines
Know the severity before it knows you.
311 violations escalate in tiers. Every alert we send includes class, fine exposure, cure window, and the exact source record — no digging required.
Severity
Class & description
Our handling
CRITICAL
Heat & Hot Water
#1 category citywide during heat season.
Instant alert · routed
WARN
Noise & Construction
Routes to DOB. Common after-hours work complaint.
Instant alert · routed
WARN
Plumbing & Water Leaks
Routes to HPD. Often becomes class B or C.
Instant alert · routed
Typical fine range · N/A · Complaints have no fines — but they become violations that do.
Check a specific address →The workflow
How 311 monitoring works for your buildings.
01
Add a building by address
Paste any NYC address. Our engine auto-resolves to BIN & BBL, backfills prior 311 history, and flags every open item on day one.
02
Our engine monitors 24/7
Signal fusion across every 311 source runs continuously. New filings, inspection outcomes, and derivative indicators are caught within minutes.
03
Alerts route to the right people
Email, WhatsApp, Slack, SMS — per-building and per-severity. Your super sees heat complaints; your counsel sees Class 1s and OATH dates.
Address-level search
Look up 311 complaints by address in NYC — before they become violations.
Every NYC violation has a 311 complaint behind it. To look up 311 complaints by address in NYC, paste any street address — the tool resolves it to a BIN and surfaces every 311 complaint routed to HPD, DOB, DEP, Sanitation, or Health, including the recurrence count and current status.
A one-time 311 complaint lookup tells you what already happened. Real-time monitoring tells you about the next 311 complaint the moment it is filed — usually 24 to 72 hours before an inspector arrives. That is the window where most issues can be cured without a violation ever being issued.
Common questions
How do I look up 311 complaints by address in NYC?
Paste a NYC street address into the free lookup tool. The 311 complaint lookup resolves the address to a BIN and pulls every 311 complaint filed against the building, sorted by routing agency (HPD, DOB, DEP, Sanitation, DOH) with recurrence counts and current status. No signup required for the first search.
What does a 311 complaint lookup show?
Every 311 complaint at the BIN, the agency it routed to (HPD for housing, DOB for construction, DEP for environmental, etc.), the complaint type, the date filed, the status (open / inspection scheduled / closed / converted to violation), and the anonymous-complainant pattern over time.
How fast does a 311 complaint become a violation?
Class C HPD complaints (no heat, no hot water, lead, mold, bedbugs) often convert to violations within 24 hours. Standard DOB complaints take 5 to 10 business days for an inspection. Real-time 311 complaint monitoring catches the complaint at filing — typically 24 to 72 hours before the inspector arrives.
311 guides
Go deeper on 311 compliance.
DOB
311
DOB Complaint Lookup NYC: Check Any Address (2026)
How to look up DOB complaints on any NYC building by address — free — plus what the priority codes mean and what happens after a complaint is filed.
Read the guide →
DOB
HPD
ECB
FDNY
311
NYC Building Violation Lookup by Address — All 7 Agencies (2026)
The complete 2026 walkthrough for searching every NYC compliance signal at any address — BIS, DOB NOW, HPD Online, OATH, FDNY, 311, and DOF — and the single shortcut that runs all seven at once.
Read the guide →
DOB
HPD
ECB
FDNY
311
NYC Building Compliance Monitoring: The Essential Guide
Why compliance monitoring exists, what "multi-signal detection" actually means, and the eight signals every NYC portfolio should be tracking today.
Read the guide →
DOB
311
DOB Complaint Lookup NYC: How to Search and Respond
How to find every open DOB complaint at your address, decode DOB complaint categories (WNP, AWH, etc.), and the 72-hour response window most owners didn't know existed.
Read the guide →
HPD
311
HPD Complaints NYC: From 311 Call to Violation (2026)
The real clock — intake, routing, inspection, issuance — with median durations by complaint type and the conditions that accelerate each stage.
Read the guide →
311
HPD
DOB
Stay Ahead of 311 Complaints in NYC: A Proactive Playbook
How 311 complaints route to DOB, HPD, DEP, FDNY, and DOHMH — and the internal systems that catch issues before tenants reach for the phone.
Read the guide →Related monitoring
Every NYC agency. One signal feed.
DOB
Department of Buildings
Permits · stop-works · FISP
View coverage →
HPD
Housing Preservation & Development
Class A / B / C · heat season
View coverage →
ECB
Environmental Control Board
OATH hearings · fine mitigation
View coverage →
FDNY
Fire Department of New York
Fire code · C of F · vacates
View coverage →Start today
Start monitoring 311 today.
Seven-day free trial. Cancel anytime. Setup in under a minute. Cover one building or a whole portfolio — same engine, same speed.