How to Check if a Building Has Open Violations Before Taking a Job in NYC

Before you sign a contract, before you submit a permit application, before you send a single worker to a jobsite - you should know what you're walking into. Buildings in NYC accumulate violations, complaints, and enforcement actions from multiple agencies over decades. A building with a clean exterior and a motivated owner can still have eight open DOB violations, three pending ECB hearings, a default judgment lien, and a pattern of 311 complaints that's put it on the DOB's priority inspection list.

None of this will be in the project description. The owner probably won't mention it. And once you're the contractor of record on a new permit at that address, the building's enforcement history becomes your problem.

The good news is that all of this information is publicly available. The bad news is that it's scattered across five different systems that don't talk to each other.

The Five Systems You Need to Check

System 1: BIS (Buildings Information System)

BIS is the DOB's legacy database and it contains the deepest historical records. For pre-job due diligence, check three tabs.

The Violations tab shows every DOB violation ever issued at the address, including the violation class (1, 2, or 3), the date of issuance, the respondent (contractor or owner), the current status (open, closed, dismissed), and any associated ECB penalties. Open violations are the ones that matter most - they indicate unresolved enforcement actions that could affect your work.

The Complaints tab shows all DOB complaints (from 311 and other sources) filed against the address. Look at the complaint types and the frequency. A building that generates 10+ complaints per year is an enforcement magnet. If most of the complaints are construction-related, the DOB's inspectors are already familiar with the address.

The Jobs/Filings tab shows all permit applications and their status. Look for expired permits (which are themselves violations), open jobs that were never closed out (sign of abandoned work by a previous contractor), and any active stop work orders.

System 2: DOB NOW

DOB NOW contains post-2020 records that may not appear in BIS. Check for recent violations, active permit applications, scheduled inspections, and any safety compliance filings (Construction Superintendent registrations, Site Safety Manager assignments). If there are active jobs filed by another contractor that haven't been closed, that's a red flag - it may indicate abandoned work that will complicate your new filing.

System 3: HPD Online

HPD (Housing Preservation and Development) violations apply to residential buildings. If the building you're considering has residential units, HPD violations are critical context. HPD violations are classified as A (non-hazardous), B (hazardous), and C (immediately hazardous). Class C violations require correction within 24 hours and often involve conditions that intersect with construction work - lead paint, structural issues, fire safety deficiencies.

A building with a stack of open HPD Class C violations tells you two things: the owner has deferred maintenance, and the building is under active HPD enforcement. Your construction work at this building will receive additional scrutiny because the enforcement agencies are already paying attention.

System 4: OATH/ECB Portal

The OATH portal shows hearing schedules, adjudication results, penalty amounts, and most importantly, default judgments. A building with multiple ECB default judgments has an owner who has been ignoring enforcement actions. Unpaid defaults become property liens and can block permit issuance.

Check the total outstanding penalty amount. If the building has $50,000 in unpaid ECB defaults, the owner has a systemic compliance problem that will affect your work at that address. Your permit application may be delayed while the DOB processes the connection between your new filing and the existing enforcement history.

System 5: NYC 311

311 shows the full complaint history for the address - not just construction complaints but all complaint types. Noise complaints, trash, pest infestations, and building condition complaints all create a picture of the property's relationship with city enforcement. High-frequency complaint addresses receive prioritized enforcement responses.

For construction due diligence, filter for complaint types that include “construction,” “building,” “noise,” and “permit.” Count the number of complaints in the last 12 months and compare to what you'd expect for the building type and neighborhood. A 6-story residential building in a quiet Brooklyn neighborhood with 15 construction complaints in a year is a property where the neighbors are actively engaged with 311 - which means any work you do there will generate complaints too.

The Red Flags to Look For

After checking all five systems, evaluate what you've found against these red flags.

Any active stop work order. Do not sign a contract. A stop work order must be resolved before new work can be authorized, and the resolution process can take weeks or months depending on the underlying issue.

More than 5 open DOB violations. This puts the building in the DOB's high-scrutiny category. Your new permit will receive faster, more thorough inspections. Price accordingly - your inspection failure rate will be higher at this building than at a clean one.

Any ECB default judgments. Default judgments indicate an owner who does not manage enforcement actions. If the owner hasn't shown up for their own OATH hearings, ask yourself whether they'll be responsive when you need their cooperation on a compliance issue during your project.

Expired permits from previous contractors. Expired permits are active violations. If the previous contractor abandoned the job without closing out permits, the building has open enforcement actions that will intersect with your new filing. You may need to require the owner to resolve the expired permits as a condition of your contract.

311 complaint frequency above the neighborhood average. If the building generates significantly more complaints than comparable buildings in the area, expect your construction activity to generate complaints too. Budget time and resources for 311 response - ensuring after-hours compliance, dust control, sidewalk protection, and noise management are airtight.

HPD Class C violations in a residential building. Active Class C violations indicate conditions that the city considers immediately hazardous. Your construction work may intersect with these conditions (lead paint in a renovation, structural issues near your work area), creating additional permitting and safety requirements.

What to Do With the Information

The goal of pre-job due diligence is not to avoid every building with a history - that would eliminate half of NYC's building stock. The goal is to know what you're walking into so you can price the job accurately, set realistic timelines, and negotiate contract terms that protect you.

If the building has a moderate violation history but no critical red flags, you can proceed with awareness. Factor potential inspection delays into your timeline. Include contract language that makes the owner responsible for resolving pre-existing enforcement actions. Ensure your insurance, permits, and safety documentation are impeccable before starting work, because this building will get inspected more frequently.

If the building has serious red flags (stop work orders, large unpaid defaults, extensive Class C violations), either decline the job or price it to reflect the risk. The contractor who takes on a problem building at the same price as a clean building is subsidizing the owner's compliance failures with their own margin.

The Easier Way

Checking five systems manually for a single address takes 30–60 minutes if you know what you're looking for. For a contractor evaluating three potential projects, that's half a day of due diligence work. Most contractors don't do it because the time cost is prohibitive relative to the urgency of winning the job.

FlagHound's compliance report aggregates all five data sources into a single search. Enter an address and get a complete compliance picture in seconds: all open violations across DOB, HPD, and ECB, the full 311 complaint history, active and expired permits, pending hearings, and an overall compliance score (GREEN, YELLOW, or RED) that summarizes the building's enforcement profile.

This article is for informational purposes only and does not constitute legal advice.