The Complete Guide to NYC DOB Violations

01 · FOUNDATIONWhat a DOB violation actually is

A DOB violation is a formal enforcement action issued by the New York City Department of Buildings against a property, a contractor, or a licensed professional. It is not the same as a summons, a complaint, or a stop-work order — though those all live in the same ecosystem and often precede or follow a violation.

The DOB issues violations when an inspector documents non-compliance with the NYC Construction Code, Zoning Resolution, Multiple Dwelling Law, or Administrative Code. Each violation gets a violation number in the format 35XXXXXXXX and lands in two places: the building's record in BIS (the legacy Buildings Information System) and, for monetary penalties, an OATH/ECB hearing docket.

The single most important thing to understand: a DOB violation is not a fine. A violation is the finding. The fine arrives through a separate process — the OATH hearing — and the amount depends on what happens there.

How violations originate

DOB inspectors arrive at a property for one of four reasons: a 311 complaint, a scheduled inspection (tied to a permit, a local law, or a program like FISP), a targeted enforcement sweep, or a referral from another agency. Roughly 60% of all DOB violations trace back to a 311 complaint that got routed to DOB — which is why complaint monitoring is the earliest possible warning signal.

02 · CLASSESThe three DOB violation classes

DOB violations are split into three classes by severity. The class determines the cure window, the escalation path, and the OATH fine schedule.

Class 1 — Immediately hazardous

Class 1 violations are the highest severity. An inspector who observes an imminent danger to life or safety will issue a Class 1 and — very frequently — pair it with a stop-work order. Examples: unsafe excavation adjacent to a structure, failed shoring, unstable facade elements, collapsed structural members, unvented gas appliances.

Cure expectation: immediate. The building is often barred from regular use until DOB confirms the hazard is resolved. The OATH penalty tier for Class 1 violations starts at $1,250 per violation and can reach $25,000+.

Class 2 — Major

Class 2 is the workhorse category — significant code violations that aren't immediately life-threatening but still require a documented, inspected cure. This is where most "work without permit" (WNP) violations land, along with most facade filing failures, expired permits, and violations of installation standards.

Cure expectation: within the timeframe stated on the Notice of Violation, typically 30–75 days. Default OATH penalty is $1,000–$2,500 depending on the specific violation code.

Class 3 — Lesser

Class 3 is administrative — minor paperwork, signage, filing, or posting violations. These rarely cause operational disruption but they still require a response. Default OATH penalty is $100–$500.

03 · THE LIFECYCLEFrom violation to resolution

Every DOB violation follows a roughly predictable lifecycle. Understanding each stage lets you intervene at the cheapest possible moment.

Stage 1 — Issuance

An inspector documents the condition on-site. The Notice of Violation (NOV) is generated, sometimes handed to a person at the property, sometimes posted, sometimes mailed. The violation record appears in BIS within 1–3 business days. ViolationWatch surfaces it within 10–20 minutes of its appearance in BIS.

Stage 2 — OATH scheduling

Every monetary DOB violation gets an OATH hearing date. It can be up to 60 days out. If you miss the hearing, OATH will issue a default judgment for the full maximum fine — not the default penalty. This is the single most expensive mistake in the NYC compliance world.

Stage 3 — Cure

The underlying condition must be corrected. Depending on the violation, this requires a licensed professional — an architect, engineer, master plumber, master electrician, or fire suppression contractor. Work is done, then certified.

Stage 4 — Certification of Correction

You (or your professional) file an AEU2 form (now via DOB NOW in most cases) attesting that the condition is corrected. DOB may verify with a re-inspection.

Stage 5 — OATH hearing

The hearing can be in-person at 66 John Street or remote. A hearing officer hears both sides. Good outcomes: dismissed, fine reduced, conditional settlement. Bad outcomes: upheld at default penalty, upheld at maximum.

Stage 6 — Payment or appeal

Unpaid OATH fines accrue interest, can be sent to a collection agency, and — for larger amounts — can be converted to a lien against the property through the NYC Law Department.

04 · SOURCES OF TRUTHWhere DOB records actually live

This is where most NYC compliance work goes wrong. DOB data is split across multiple systems, and no single portal holds everything.

BIS — Building Information System

The legacy portal. Still holds the complete historical record for most buildings. Violations, complaints, permits pre-2020, certificates of occupancy, job filings. Search by BIN, BBL, or address. Tutorial here.

DOB NOW

The modern portal. Houses job filings, inspections, certificates of correction, facade filings, and most post-2020 permit activity. If you filed something since the migration, it's in DOB NOW.

OATH Hearings Division

The fine docket. Tracks violation-by-violation status: scheduled, defaulted, resolved, paid, pending. Separate portal from DOB. Critical for managing the fine side of a violation.

NYC Open Data

Raw datasets for anyone doing bulk analysis. Not useful for one-off compliance lookups but foundational for pattern analysis.

The ViolationWatch free lookup runs across all four in parallel — so you don't have to.

05 · COMMON CATEGORIESThe 10 DOB violation types you'll actually see

• Work without a permit (WNP) — #1 by volume. Any alteration work performed without a valid permit. Penalty starts at 2× the standard filing fee.
• Failure to maintain — A building component is deteriorated and the owner hasn't addressed it.
• Failure to file facade report (LL11) — Sub-cycle filing missed. Cure: file the missing report.
• Failure to certify correction — A prior violation was corrected but AEU2 was never filed. Closes the loop.
• Failure to maintain exterior wall — LL11-adjacent. Facade-related observable defect.
• Illegal conversion — A space is being used for something not permitted by the C of O. Serious.
• Occupancy contrary to C of O — Variant of illegal conversion. Often means residential use of commercial space, or SRO use of family dwelling.
• Unsafe building / structural — Structural component is failing. Usually Class 1.
• Failure to comply with inspection — Inspector visited, didn't get access, re-inspection fee applies.
• Non-compliance with order — A prior DOB order wasn't followed. Escalation-track.

06 · CURE STRATEGIESWhat to actually do when you get one

Day 0–3: Verify and categorize

Pull the full record. Confirm the class, confirm the cure requirements, confirm the OATH hearing date. If the hearing is within 14 days, move fast on the response strategy.

Day 3–10: Retain the right professional

Cure usually requires a licensed professional — a PE for structural, an RA for architectural, a LMP for plumbing, a LME for electrical. Don't try to self-cure anything that requires a certification signature.

Day 10–25: Execute the cure

Do the work. Document with photos and invoices. Professional files the AEU2 and attaches the required evidence.

Day 25+: Hearing strategy

If the cure is complete before the hearing, the path is usually "cured — seeking dismissal." If the cure isn't complete, the path is "stipulated settlement" — owner agrees to the cure, OATH agrees to a reduced penalty conditioned on the cure being documented within a set window.

07 · MONITORINGWhy the monitoring side matters more than the cure side

Every compliance professional says the same thing: the cheapest violation is the one you catch in the first 24 hours. Here's why.

A Class 2 violation that's cured and certified within 30 days typically settles at OATH for $500–$1,000 with a stipulation. The same violation, if the hearing is defaulted, lands at the maximum default — often $2,500 to $10,000 — plus interest, plus collection fees, plus potentially a lien.

ViolationWatch exists because that gap between "we got it the day it was issued" and "we got a demand letter three months later" is the single largest lever an NYC owner has. Our detection engine catches violations within 10–20 minutes of appearance in BIS and routes the alert to whoever owns the cure — super, PM, legal, owner.

08 · THE BOTTOM LINEYour action checklist

1. Know your BIN and BBL for every building you own or manage.
2. Have continuous monitoring active for every building. See how DOB monitoring works.
3. Have a pre-vetted licensed professional relationship ready for each trade you might need.
4. Treat OATH hearing dates as hard deadlines. Never let a hearing default.
5. File every AEU2. Unclosed-loop violations stay on the record forever and affect refinances.
6. Review the DOB portion of your building's record quarterly, even when no active violations exist. Patterns matter.