DOB Complaints in NYC: What Happens Next

DOB complaints are one of the most common ways NYC building violations get started. Someone calls 311 about construction noise at 11 PM, an illegal basement apartment, or scaffolding that looks wrong. The DOB logs the complaint, sends an inspector, and things go from there.

This guide covers the process from both sides. If you're filing a complaint, you'll learn how to do it and what to expect. If you're a property owner who just found out someone complained about your building, you'll learn what comes next and how to handle it.

How to File a DOB Complaint in NYC

There are four ways to file a DOB complaint in New York City:

• Call 311. The fastest option for emergencies. Tell the operator you want to file a building complaint. They'll ask for the address, the issue, and your contact info (optional).
• File online at portal.311.nyc.gov. Select "Building" as the category, describe the problem, and enter the address. You'll get a service request number to track the complaint.
• Submit through DOB NOW. The DOB's own portal lets you file complaints directly. This route is more common among industry professionals.
• File directly on the DOB website. Go to nyc.gov/site/buildings/dob/file-a-complaint.page for DOB's official complaint form.
• Visit your borough's DOB office in person. Walk in during business hours and file at the counter. Bring the property address and a description of the issue.

Anonymous filing is always available. You don't need to give your name, and DOB won't tell the property owner who filed the complaint. Anyone can file. Tenants, neighbors, people walking by. There's no requirement that you have a connection to the property.

Types of DOB Complaints

DOB categorizes complaints by code. Here are the most common types you'll see in NYC:

Code	Category	Description
01	Illegal Conversion	Basement apartment, SRO, or unapproved unit
02	Work Without Permit	Construction without a DOB permit
03	After-Hours Work	Before 7 AM or after 6 PM on weekdays
04	Unsafe Building	Structural danger or collapse risk
05	Defective/Dangerous	Exposed wiring, broken stairs, hazardous conditions
14	Construction Noise	Exceeding noise limits or working during wrong hours
15	Work Contrary to SWO	Continuing work after a stop work order

Complaint code 01 (illegal conversion) is one of the most common in Brooklyn and Queens. It often leads to violations involving the property's certificate of occupancy. Code 02 (work without permit) is the most frequent overall. If you're unsure whether your project needs a permit, check our guide on permit requirements before starting work.

What Happens After a DOB Complaint Is Filed

Once a complaint is in the system, DOB follows a consistent process. Here's how it works, step by step:

1. Complaint logged and assigned a number. DOB records the complaint in their system and assigns a unique complaint number. This number is how you'll track progress.
2. DOB categorizes the complaint by urgency. The category determines how quickly an inspector gets dispatched. See the table below.
3. Inspector assigned from the borough office. The complaint goes to the DOB borough office where the property is located. An inspector from that office picks it up.
4. Property inspected. The inspector visits the property, looks for the reported condition, and documents what they find.
5. Disposition code assigned. After the inspection, the inspector assigns a disposition code that describes the outcome. We cover these codes below.
6. Violation issued if condition confirmed. If the inspector confirms the problem, they issue a DOB violation or ECB violation (with fines).
7. Property owner notified with cure period. The owner receives notice of the violation and gets a deadline to fix the issue.
8. Follow-up inspection to confirm correction. DOB sends an inspector back to verify the condition has been corrected.

The timeline depends entirely on the priority level DOB assigns:

Category	Response Time	Examples
Emergency / Imminent Risk	Within 24 hours	Structural collapse, crane emergency, falling debris
Construction (Unpermitted Work)	1 - 7 days	Work without permit, illegal conversion, deviation from plans
Standard	7 - 14 days	Noise complaints, sidewalk shed issues, minor unsafe conditions

Keep in mind that these are targets, not guarantees. DOB handles thousands of complaints across the five boroughs. During busy periods, standard complaints can take longer than 14 days. Emergency complaints almost always get inspected within the 24-hour window.

DOB Complaint Disposition Codes Explained

After an inspector visits the property, they assign a disposition code. This code tells you the outcome of the inspection. You can look it up on BIS or through your 311 service request. Here's what the most common codes mean:

Code	Meaning	What It Means for You
A1	Violation Issued	Condition confirmed. Violation now on record for the property.
A3	Summons Issued	ECB penalty (fine) issued. You'll get a hearing date at OATH.
A8	Emergency Declaration	Serious safety issue. Possible vacate order or emergency stabilization.
I1	No Violation Warranted	Inspector found no issue. Complaint closed.
I2	No Access	Inspector couldn't get into the property. May return later.
I3	Condition Not Found	Problem not observed during inspection. Complaint closed.
L4	Full Stop Work Order	All work on the property halted immediately.

Disposition codes starting with "A" mean the inspector took enforcement action. Codes starting with "I" mean no violation was issued (the complaint wasn't substantiated). The L4 code is one of the most serious outcomes, resulting in a full stop work order.

What Happens If DOB Finds a Violation

If the inspector confirms the reported condition, the complaint leads to a violation. There are two main types:

• DOB violation. A notice that a condition exists and must be corrected. No immediate fine, but failure to correct can lead to penalties.
• ECB violation. A violation with a monetary penalty attached. You'll get a summons with a hearing date at OATH (the old Environmental Control Board). Fines range from $250 to $25,000 or more depending on the violation type.

The consequences escalate based on severity. For minor issues (like a missing handrail), you might get a DOB violation with a cure period. For serious problems (like illegal construction or unsafe conditions), expect ECB fines, a possible stop work order, or in extreme cases, a vacate order that forces occupants out of the building.

Penalties for building code violations in NYC aren't small. Work without a permit ranges from $2,500 to $25,000, plus a stop work order in most cases. Illegal conversions run $5,000 to $15,000. Repeat offenders or those who ignore violations can face penalties up to $25,000 per day. These amounts add up fast, especially when interest accrues on unpaid fines.

Here's a number worth knowing: when a complaint about unpermitted work is filed and an inspector confirms it, the violation rate is over 95%. If the work is actually unpermitted, you're almost certainly getting a violation. That's why it's always better to get the right permits before starting.

One more thing: you won't know a complaint was filed against your property unless you check. DOB doesn't notify owners when a complaint comes in. The first sign is usually an inspector at your door. Regular checks on BIS (a810-bisweb.nyc.gov) are the only way to stay ahead of it.

How to Check DOB Complaint Status

All DOB complaint data is public record. Anyone can look it up. Here are three ways to check:

• BIS (Buildings Information System). Go to a810-bisweb.nyc.gov, search by property address, and click the "Complaints" tab. You'll see every complaint filed against the property, along with the priority level, inspection date, and disposition code.
• 311 tracking. If you filed through 311, use your service request number to check the status at portal.311.nyc.gov. You'll see whether an inspector has been assigned and what the outcome was.
• DOB NOW portal. Log into DOB NOW to see complaints associated with properties you own or manage. The portal shows real-time status updates.

If you're a property owner, checking BIS regularly is a good habit. Complaints sometimes get filed without your knowledge, and you don't want to be caught off guard when an inspector shows up. If you need help navigating the process, our team handles everything from complaint response to violation resolution.

Received a DOB Complaint? What Property Owners Should Do

Finding out someone filed a complaint against your property is stressful. Here's what to do, in order:

1. Check BIS for complaint details. Look up your address on a810-bisweb.nyc.gov and review the complaint category, priority, and current status. This tells you what DOB is looking for.
2. Cooperate with the inspection. When the inspector arrives, let them in. Refusing access doesn't make the complaint go away. It keeps the complaint open and gives DOB grounds to get an administrative warrant. That's worse.
3. Cure the condition within the cure period. If the inspector issues a violation, you'll get a specific timeframe to fix the problem. Do it before the deadline. Late corrections mean higher fines.
4. Hire a PE or RA if needed. For permit-related complaints (work without permit, illegal conversion), you'll likely need a licensed Professional Engineer or Registered Architect to file corrective plans with DOB.
5. Contest at OATH if you got an ECB violation. If you believe the violation was issued in error, you can fight it at an OATH hearing. Bring documentation, photos, and any evidence that supports your case.

For a full walkthrough on clearing violations from your property record, see our guide on removing a DOB violation.

False or Frivolous Complaints

It happens. Disgruntled tenants, feuding neighbors, or competitors file complaints that have no basis. Here's what you should know about how DOB handles these situations.

DOB investigates all complaints regardless of merit. They don't screen complaints for validity before sending an inspector. Even if the complaint is clearly bogus, an inspector still has to visit the property and document what they find.

There's no penalty for filing an unfounded complaint. NYC doesn't fine people for complaints that turn out to be baseless. This is by design. The city wants people to report genuine safety concerns without fear of retaliation.

Repeated frivolous complaints from the same source do get flagged internally, but DOB still must inspect each time. If you're dealing with a pattern of false complaints, the disposition codes work in your favor. An I1 (No Violation Warranted) or I3 (Condition Not Found) on the record shows the complaint wasn't substantiated.

If someone is using DOB complaints to harass you, that's a civil matter between you and the person filing. DOB won't intervene in neighbor disputes. You'd need to pursue that through the courts separately.