You pulled a valid DOB permit, hired a licensed contractor, replaced the windows, and passed inspection — and a letter from the Landmarks Preservation Commission still landed in your mailbox. That letter is the cheapest moment this problem will ever have. Ignore it twice and a Type A landmark violation carries a fine of up to $5,000, then up to $250 per day on top of a $5,000 minimum.

What most owners get wrong is assuming the Department of Buildings and the Landmarks Preservation Commission are the same approval. They are two agencies with two separate sign-offs, and a designated building needs both. The second mistake is reading the LPC warning letter as a form letter instead of what it actually is — the first of exactly two chances to fix the work and pay nothing.

A NYC landmark violation is issued by the Landmarks Preservation Commission when work on a designated building or in a historic district proceeds without LPC approval. A DOB permit is not a substitute. LPC allows two chances to cure at no cost; after both, Type A fines reach $5,000, and a second notice adds up to $250 per day.

How do I know if my building is regulated by the Landmarks Preservation Commission?

The Landmarks Preservation Commission regulates far more of New York City than most owners realize. In a press release dated April 14, 2025, LPC put its portfolio at 1,464 individual landmarks, 123 interior landmarks, 12 scenic landmarks, and 157 historic districts and extensions — more than 38,000 buildings and sites in total.

A property does not have to be individually famous to be covered. If a brownstone in Park Slope, a rowhouse in Harlem, or a co-op on the Upper West Side sits inside a historic district boundary, its exterior is regulated even though the building itself was never singled out for designation. Owners find this out from a warning letter rather than from a title report.

The work that triggers a landmark violation is rarely dramatic. Replacing windows. Repointing brick with the wrong mortar. Installing a storefront sign. Painting a facade. Adding a rear extension or a rooftop bulkhead that cannot be seen from the street but still falls inside LPC jurisdiction. Almost nobody files that under “construction,” which is exactly why the notice is a surprise.

What does an LPC warning letter mean?

An LPC warning letter is the Landmarks Preservation Commission’s first enforcement step, and it is the single cheapest exit from a landmark violation. Per the Commission’s published violations and enforcement rules, the letter describes the illegal work and states that the owner can either correct it or appeal to the full Commission to retroactively legalize it. Resolve the matter at this stage and no penalty is assessed at all.

The Landmarks system is built to get conditions corrected, not to collect money — and that design shows up as two distinct grace periods before a dollar is at risk.

1. The warning letter. Correct the work or apply to legalize it retroactively. No fine.
2. The Notice of Violation. If the warning letter goes unanswered, LPC issues an NOV with a hearing date at OATH. Even then, if the recipient pleads guilty and applies to the Commission before the hearing date to cure the violation or have the alteration legalized, no fine will be imposed. This is the second and final free exit.

Two clean escapes, and most owners burn through both — because the warning letter looks like a form letter and the NOV looks like something an attorney can deal with next month.

How much is a NYC landmark violation fine?

A NYC landmark violation carries a fine set by violation type once both grace periods have passed. The figures below come directly from the Landmarks Preservation Commission’s enforcement page.

Two further exposures sit outside that table. Violating an LPC stop work order carries a fine of up to $500 per day. And the Landmarks Law still permits criminal penalties of between $500 and $15,000 per day — with complete or partial demolition of a landmark handled in civil court rather than at OATH.

These penalties stack with everything else the same job can generate. Unapproved work on a designated building routinely produces a landmark violation, a DOB violation, and an ECB civil penalty — three matters on three tracks, all traceable to one contractor who never asked whether the building was designated. If you are not sure what is already open against the address, start with an ECB ticket search.

What is the difference between a Certificate of Appropriateness and a Certificate of No Effect?

A Certificate of Appropriateness (C of A) is the Landmarks Preservation Commission’s approval for work that changes a landmark’s significant protected features, and it typically requires a public hearing before the full Commission. A Certificate of No Effect (C of NE) is the faster staff-level approval for work that needs a DOB permit but does not affect protected features.

The distinction is a scheduling decision, not paperwork trivia. LPC reported on April 14, 2025 that 95% of its permit approvals are issued at staff level without full Commission review — so filing into the right lane is usually the difference between weeks and months. Choosing wrong on a violation that is already accruing exposure is expensive.

How does an open landmark violation affect a sale, refinance, or DOB filing?

An open landmark violation does not stay inside LPC’s file. It behaves like every other open item on a New York City property record, and it complicates four things at once.

• It surfaces on title searches. A buyer’s attorney or title company pulling records before closing will find it, and an unresolved landmark violation on a brownstone is exactly the item that stalls a deal in the final two weeks.
• It can block DOB filings. If the corrective work itself needs a permit, LPC sign-off generally has to come first — so the unresolved landmark issue holds up the very filing that would fix it.
• It travels with the property. Buy a landmarked building carrying an open LPC violation from the prior owner’s unpermitted work and the obligation to cure it is now yours.
• A tenant does not shield the owner. Both owner and tenant are responsible for a violation. LPC may pursue a commercial tenant who installed an unapproved storefront, but the owner remains ultimately responsible for compliance.

Landmark violations are also worse than most at clearance time, because the cure can require a design review rather than a repair. Brokers and title companies working in Brooklyn Heights, Park Slope, Greenwich Village, or Harlem should treat LPC status as a standard pre-listing check — see our guidance for real estate professionals on where violations surface in a transaction.

How do you clear a NYC landmark violation?

Clearing a NYC landmark violation means correcting or legalizing the work with the Landmarks Preservation Commission and then getting written confirmation that the record is closed. The sequence below is the one that keeps the matter inside a grace period.

1. Treat the warning letter as the deadline it is. It is not a courtesy notice. It is the first and cleanest of two chances to resolve this at zero cost.
2. Determine whether the work can be legalized. If the completed work complies with the Commission’s regulations, LPC will legalize the change and retroactively issue a permit. That outcome is more common than owners expect.
3. If it cannot be legalized as built, find out what modification LPC will accept. The remedy ranges from removing a sign to designing an entirely new storefront. LPC staff will discuss it — the fix is negotiable in a way DOB violations usually are not.
4. File the right application. A C of NE moves at staff level; a C of A may require a public hearing before the full Commission.
5. Run the DOB side in parallel. If the corrective work needs a permit, sequence the LPC approval and the DOB filing together rather than one after the other. Serial filing is the single biggest source of avoidable delay.
6. Get the Notice of Compliance. When the condition is corrected, LPC issues an NOC. Until that document exists the violation is still open on the record, no matter what the building looks like. Fixing the condition and closing the violation are two different events.

What happens if you miss the 25-day cure window after a hearing?

The 25-day cure window is the last soft deadline in the landmark violation process. LPC’s enforcement rules provide that a second Notice of Violation may be served for the same condition if the violation is not cured within 25 days of being found liable at a hearing — and second and subsequent notices come with no grace periods, meaning a fine will be imposed.

Twenty-five days is not much time to retain an architect, prepare an LPC application, and line up a contractor. Owners who wait for the hearing outcome before starting the application are usually already behind. The work of assembling the cure should begin the day the NOV arrives, not the day liability is decided.

Hearings themselves are held at the Office of Administrative Trials and Hearings (OATH), the same tribunal that hears ECB matters. The exception is unauthorized complete or partial demolition of a landmark, which is handled in civil court.

Get the Record Checked Before It Costs You

The landmark violation process is one of the few NYC enforcement systems that will genuinely let an owner off the hook — twice — and one of the few where owners pay anyway, because nobody explained what the first letter meant.

Valerie Samuel and All Boro Expediter handle landmark, DOB, ECB, HPD, and FDNY violations across all five boroughs, including the LPC and DOB filings that have to run in parallel to close a landmark matter. If a warning letter or an NOV has arrived, or exterior work on a designated property is being planned, get in touch or review the full range of expediting services.

Frequently Asked Questions

Do I need LPC approval if I already have a DOB permit?

Yes. LPC approval is required for most exterior changes and for interior work that requires a DOB permit, and the two approvals are independent of each other. A valid DOB permit does not protect an owner from a landmark violation, and in practice DOB will often require LPC sign-off before processing the application at all.

How much is a NYC landmark violation fine?

Type A violations — serious alterations to cornices, stoops, windows, storefronts, or rooftop and backyard additions — carry a first-time fine of up to $5,000, and a second Notice of Violation adds up to $250 per day with a $5,000 minimum. Type B violations, covering items like repainting a facade, replacing one window, or installing a sign or light, carry a first-time fine of up to $500, with a second notice adding up to $50 per day on a $500 minimum. Both grace periods, if used, result in no fine at all.

Where are LPC violations heard?

Most landmark violations are adjudicated at the Office of Administrative Trials and Hearings (OATH), the same tribunal that handles ECB matters. The exception is unauthorized complete or partial demolition of a landmark, which is handled in civil court rather than administratively.

Can a landmark violation be legalized after the fact?

Often, yes. If the completed work complies with the Commission’s regulations, LPC will officially legalize the change and retroactively issue a permit. If it does not comply, the owner is given the opportunity to modify the alteration — anything from removing a sign to redesigning a storefront. The earlier an owner engages, the more of those options remain open.

Am I liable if my tenant did the unapproved work?

Potentially both parties are. LPC’s enforcement rules state that both owner and tenant are responsible for a violation, and the Commission may pursue a tenant directly where the tenant did the work. The property owner remains ultimately responsible for ensuring the property complies with landmark regulations as well as building, housing, and fire codes. Commercial leases in historic districts should address this explicitly.

Will an open landmark violation stop my sale?

It can. Open violations appear on title searches, and buyers’ attorneys routinely require them cleared or escrowed before closing. Landmark violations are harder than most because the cure may require a design review and a Commission hearing rather than a simple repair, which pushes the clearance timeline into months. Pull the record before listing.

How do landmark violations compare to other NYC violation types?

Landmark violations are unusual in offering two no-fine grace periods; most other agencies do not. HPD violations run on class-based correction deadlines with civil penalties, DOB violations move to ECB civil penalties at OATH, and FDNY violation orders carry their own correction schedule. A single unpermitted job on a designated building can open matters at several of these agencies simultaneously.

All Boro Expediter NYC Building Expeditor and Licensing Filing Representative

Valerie Samuel is a New York City building expeditor and licensing filing representative who helps property owners, developers, real estate brokers, and title companies resolve DOB, HPD, and ECB violations and navigate building compliance issues across New York City.

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