NYC Letter of No Objection: When You Need One and How to File

A NYC Letter of No Objection is a document from the New York City Department of Buildings confirming that a building’s current use is legally recognized when no Certificate of Occupancy exists, or when the use differs from what the CO on file describes. Property owners most often need one for buildings constructed before January 1, 1938, which were never required to have a CO under the city’s building code. The DOB issues the letter after reviewing historical records and verifying that the use matches what city files show and complies with zoning rules.1American Legal Publishing. NYC Administrative Code 28-118.3.5 – Existing Buildings or Open Lots Without Certificates of Occupancy

When You Actually Need One

The most common trigger is simple. Your building predates 1938, has no CO on file, and someone outside the DOB wants proof that the current use is lawful. Under NYC Administrative Code ยง 28-118.3.5, a building that existed before January 1, 1938 and was lawfully used without a CO can keep operating that way, as long as the use stays consistent with DOB records and the occupancy classification does not change. The use is legal. You just have no easy way to prove it. That is the gap the letter fills.

The New York State Liquor Authority will not grant a liquor license unless the applicant can show a valid CO or a Letter of No Objection. If you are opening a bar or restaurant in an older building without a CO, there is no way around this step. Sales and refinancing create the same pressure point: buyers, lenders, and title companies flag buildings with incomplete DOB records, and a LONO resolves the question before closing.

A letter is also available when a CO exists but the current use does not quite line up with it. The DOB will consider issuing one if the proposed or actual use falls within the same Use Group under the Zoning Resolution and the same Occupancy Group under the Building Code, and the building’s exits and occupancy load have not changed.2NYC Department of Buildings. Letter of No Objection or Completion

Here is the boundary that matters most. If your use has shifted into a different Use Group or Occupancy Group, a Letter of No Objection cannot fix it. You will need to file an Alteration Type 1 application and obtain a new Certificate of Occupancy instead.3NYC Department of Buildings. Code Notes – Letter of No Objection or Letter of Verification Applying for a LONO when you actually need a new CO wastes time and will be denied.

Letter of No Objection vs. Letter of Verification

The DOB issues two similar-sounding documents, and people regularly confuse them. The difference is whether a CO already exists.

A Letter of No Objection is issued when no CO is available, or when the building’s use differs from what appears on the CO or in DOB records. Pre-1938 buildings without a CO are the classic case. A Letter of Verification is issued when a CO is already on file and an outside agency or lender needs the DOB to clarify or confirm the current use. Both are accepted by government agencies in place of a CO, but neither one substitutes for a CO when the building actually needs a new one.3NYC Department of Buildings. Code Notes – Letter of No Objection or Letter of Verification

What the DOB Checks Before Issuing One

A plan examiner verifies that the claimed use fits within the Use Groups permitted in the property’s zoning district. The Zoning Resolution sorts every building use into groups, and each zoning district only allows certain ones.4NYC Zoning Resolution. Article II – Chapter 2 – Use Regulations If the use you are claiming does not belong to a Use Group allowed where your property sits, the request will be denied.

Non-conforming uses add real complexity. A non-conforming use is one that was legal when it started but no longer fits current zoning. Under the Zoning Resolution, if a non-conforming use stops for a continuous period of two years, the building can only be used going forward for a conforming purpose. The owner’s intent to resume operations does not matter.5NYC Zoning Resolution. Article V – Chapter 2 – Non-Conforming Uses If your application involves a non-conforming use, you will need to prove the use was never interrupted for more than two years running. Leases and utility bills are the usual proof.

Evidence You’ll Need to Gather

The application is the DOB’s Letter of No Objection or Letter of Verification form. It asks for the property address, block, lot, and BIN (Building Identification Number), along with a description of the proposed or existing use and a history of the building’s occupancy.6NYC Department of Buildings. Letter of No Objection or Letter of Verification Application The form is the easy part. The real work is assembling documentation that proves the building has been used the way you claim.

Useful evidence sources include:

  • Property deeds. The Department of Finance’s Office of the City Register holds records of transfers and mortgages for the Bronx, Brooklyn, Manhattan, and Queens; the Richmond County Clerk holds them for Staten Island. Deeds often contain historical property descriptions.7NYC Department of Finance. Property Recording and Property-Related Documents
  • I-cards. The Department of Housing Preservation and Development maintains an online database of these index cards from the early 1900s, which document apartment-by-apartment observations by early code inspectors. They are especially useful for residential buildings proving historical unit counts.8NYC Department of Buildings. Find Building Data
  • Tax assessment records. Historical ledgers from the Municipal Archives can show when a building was built and how its use changed. Shifts in the property description, assessed valuation, or number of stories are what you are looking for. Department of Finance property cards, created in the late 1930s, sometimes record data going back to 1926.9NYC Municipal Archives. How to Use Tax Assessment Records to Date Construction of a Building
  • Sanborn maps. These fire insurance maps show building footprints, lot dimensions, and structural details across decades, and are one of the best tools for showing what stood on a lot at a given point.
  • Utility records. Old water, gas, or electric bills can show that a business operated continuously at the location, which matters most for non-conforming use claims.

Every piece of evidence has to connect the physical space to the specific use you want approved. The examiner will compare your submission against the DOB’s own archived records, so inconsistencies will cause problems. Start with the most recent records and work backward.

How and Where to File

Unlike many DOB filings that have moved to the DOB NOW portal, Letters of No Objection are still requested through the borough office where the property is located.2NYC Department of Buildings. Letter of No Objection or Completion Contact the borough office before you go in to confirm what they want to see. Owners who prefer not to run the process themselves can hire a Class 1 Filing Representative registered with the DOB to submit on their behalf.

For straightforward cases with clean documentation, expect the review to take at least 30 days. Properties with messy histories, record gaps, or non-conforming use questions can take considerably longer. If the evidence holds up, the DOB issues the formal letter.

If the DOB Denies the Request

Common denial reasons include:

  • Insufficient records to support the claimed use. This is the most common reason and usually means more historical evidence is needed.
  • The requested use falls in a different Use Group or Occupancy Group than what city records show. An Alteration Type 1 and new CO are required.
  • An Alteration Type 1 application is already open on the building, which would generate a new CO.
  • Outstanding violations tied to life safety, hazardous conditions, or work without a permit.
  • A non-conforming use that cannot be shown to have run continuously without a two-year gap.3NYC Department of Buildings. Code Notes – Letter of No Objection or Letter of Verification

Denials can be appealed. The first meaningful appeal goes to the Technical Affairs Bureau, followed by the First Deputy Commissioner. Each level carries a $2,500 fee, though nonprofits, government-owned properties, HPD affordable housing, and one-, two-, and three-family homes are exempt. If internal appeals are exhausted, you can request a final department determination for submission to the Board of Standards and Appeals, which reviews cases independently of the DOB.10NYC Department of Buildings. DOB NOW Build – Determinations and Appeals

What’s at Stake If You Skip This

Operating without proper occupancy documentation is not a quiet paperwork problem. The DOB actively enforces occupancy violations, and the penalties are heavy. In a single month in early 2026, the DOB imposed $112,000 on one owner for converting a 4-family dwelling into an 11-family dwelling, $69,000 on another for adding illegal cellar units, and $60,000 on a third for converting a 2-family home into a 5-family building. Daily fines often continue for as long as the illegal condition persists.11NYC Department of Buildings. Enforcement Action Bulletin – February 2026

Fines are not the whole picture. The DOB can issue a Vacate Order when inspectors find conditions that pose an imminent danger to occupants. A vacate order can cover part of a building or the entire property, and no one can enter once it takes effect until the hazardous conditions are corrected. Fines tied to vacate conditions can reach $25,000 on top of the underlying occupancy penalties.12NYC Department of Buildings. Vacate Orders A documentation problem that looks manageable on paper can turn into an immediate displacement for tenants or a shutdown for a business.

Loft Board Letters of No Objection Are a Separate Thing

Buildings registered as Interim Multiple Dwellings with the NYC Loft Board have their own LONO requirement, and owners regularly confuse it with the standard DOB letter. If you want to do work in the non-IMD spaces of an IMD building, the DOB will not process the application until the Loft Board issues its own Letter of No Objection. To get one, the owner must hold a current annual IMD registration, carry no outstanding Loft Board fines or fees, and show that reasonable steps are being taken to legalize the IMD units. The work itself must involve no change in use, egress, or occupancy.13NYC Loft Board. Letter of No Objection This is a different document from the standard DOB LONO, with its own review process.