HPD vs DOB Violations in NYC — What Contractors Need to Know

Most NYC contractors know about DOB — the Department of Buildings. It's the agency that issues permits, sends inspectors, and shuts down job sites. What far fewer contractors know is that there is a second, equally large violation database published by HPD — the Department of Housing Preservation and Development — that covers a completely different set of conditions in residential buildings across all five boroughs.

If you are only checking DOB violations for leads, you are ignoring roughly half the opportunity. This guide explains both datasets, which trades they serve, and how to use them together to build a lead pipeline that most contractors in your market don't even know exists.

Two Agencies, Two Very Different Scopes

The key distinction is scope. DOB looks at whether a building complies with the building code — the technical standards for how buildings are constructed, maintained structurally, and operated mechanically. HPD looks at whether a building is habitable — whether tenants have heat, safe conditions, functioning plumbing, and freedom from environmental hazards.

A building that passes a DOB inspection can still have dozens of open HPD violations. A building with no HPD violations might have critical DOB code deficiencies. The two agencies operate independently with separate inspectors, separate databases, and separate fine systems.

DOB Violations in Depth

DOB violations are issued for conditions that violate the NYC Building Code, the Zoning Resolution, or the Multiple Dwelling Law. They apply to all buildings — from a two-family townhouse in Staten Island to a 50-story office tower in Midtown. DOB inspectors conduct proactive inspections on new construction, respond to complaints, and perform mandated cycle inspections for specific building types.

The most common DOB violation categories relevant to contractors include:

• Facade and exterior wall defects (Local Law 11 / FISP): Spalling, exposed rebar, failing parapet walls, and unsecured balcony elements. This is the largest DOB violation category by dollar value of work required.
• Elevator violations: Safety device failures, periodic inspection deficiencies, and equipment malfunctions. Elevator violations require licensed elevator contractors to correct and certify.
• Fire suppression and safety: Sprinkler system failures, fire door defects, and suppression system malfunctions requiring life safety contractors.
• Electrical and gas: Exposed conductors, meter bypass violations, and illegal gas connections. Only licensed electricians and master plumbers can certify correction.
• Structural violations: Settlement cracking, foundation movement, and retaining wall failures requiring structural engineers and general contractors.
• Permit violations: Work performed without permits, expired permits, and failure to maintain certificates of occupancy.

DOB violations tend to be higher-value jobs because they often involve complex structural or mechanical work on larger buildings. A single DOB facade correction on a 10-story building in Brooklyn can be a $100,000 to $500,000 contract. Elevator modernizations triggered by DOB violations often run $200,000 to $1,000,000 on larger residential buildings.

HPD Violations in Depth

HPD violations are issued specifically for residential buildings under the NYC Housing Maintenance Code and Multiple Dwelling Law. They arise from two sources: proactive inspections by HPD inspectors and tenant complaints filed through 311.

HPD violations are classified differently than DOB violations:

• Class A (Non-Hazardous): Minor conditions that must be corrected within 90 days. Examples: peeling paint in non-lead situations, minor plaster damage.
• Class B (Hazardous): Conditions that require correction within 30 days. Examples: no hot water, roach infestation, defective window guards, damaged flooring.
• Class C (Immediately Hazardous): Must be corrected within 24 hours. Examples: no heat in winter (below 55°F outdoor / 68°F indoor threshold), lead paint hazard with children in unit, elevator out of service in 6+ story building, gas leak.

Note that HPD's "Class C" is equivalent to DOB's "Class A" in terms of urgency — both designate immediately hazardous conditions. This can create confusion when contractors are looking at both datasets. Always check which agency issued the violation to interpret the class correctly.

The most valuable HPD violations for contractors include:

• Heat violations (Class C): In heating season (October 1 to May 31), landlords must maintain 68°F in living areas when outdoor temp drops below 55°F and 55°F overnight. Boiler failures and distribution system failures are high-urgency, high-opportunity jobs.
• Plumbing violations: No hot water, backed up sewage, leaking pipes, and water supply failures. These appear year-round in large numbers.
• Mold violations: Visible mold, water damage enabling mold growth, and chronic moisture problems. Mold remediation contractors and plumbers who fix the underlying leak both benefit.
• Lead paint violations: Peeling paint in units with children under 6. Requires licensed lead abatement contractors.
• Pest infestations: Roach, rodent, and bed bug infestations. Pest control operators and exterminators benefit most directly.

Which Trades Benefit from Each Dataset

Some trades draw primarily from one dataset. Others benefit from both.

• Facade / Local Law 11 specialists: Almost exclusively DOB. HPD does not issue facade violations.
• Elevator contractors: Primarily DOB (structural elevator violations) and HPD Class C (elevator out of service in tall residential buildings).
• Fire safety contractors: Primarily DOB. HPD may note missing smoke detectors but more severe fire system failures go through DOB.
• Plumbers: Both datasets heavily. DOB for gas and permit violations; HPD for heat, hot water, and plumbing habitability violations.
• Electricians: Primarily DOB for code violations; HPD for habitability-related electrical deficiencies in older buildings.
• Heat/boiler contractors: Primarily HPD. Boiler failures that create habitability violations are core HPD violations.
• Mold/water damage contractors: Primarily HPD, but DOB facade violations often create water infiltration that leads to HPD mold violations downstream.
• Lead abatement contractors: Exclusively HPD. Lead paint violations are solely within HPD's enforcement jurisdiction for residential buildings.
• Pest control: Primarily HPD. Rodent and roach infestations in residential buildings fall under HPD's housing maintenance code.

How to Use Both Together

The most sophisticated contractors use both datasets simultaneously and look for buildings with violations in multiple categories — because that signals a landlord who is struggling to maintain a property across multiple systems, not just dealing with an isolated issue.

A building with five HPD violations AND two DOB violations is a better lead than a building with just one violation. The volume of open violations tells you something important: this owner needs help, they are likely overwhelmed, and a contractor who can address multiple issues on a single visit is offering them exceptional value.

Looking at both datasets also lets you approach the same property with a broader offering. If you do plumbing and you see an HPD hot water violation at a Brooklyn brownstone, check DOB for the same address. You might find there is also a permit violation for unpermitted plumbing work — a conversation you can have with the owner that demonstrates you understand the full regulatory picture, not just the immediate surface problem.

A Real-World Scenario

This scenario plays out thousands of times across NYC every month. Older buildings with deferred maintenance accumulate violations across multiple systems. The owner who is struggling to address a facade DOB violation is the same owner who has ignored the boiler for two years. Being the contractor who can walk in, understand the full regulatory picture, and offer solutions builds a relationship that goes well beyond a single job.