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    What Is an FDNY Filing?

    A plain-English guide to FDNY filings in NYC — what they are, which fire protection systems require them, how the FDNY Business plan-examination process works, and why most FDNY jobs run in parallel with a DOB filing.

    FDNY Filing: The Definition

    An FDNY filing is a plan submission and permit application made to the Fire Department's Bureau of Fire Prevention for the design, installation, and testing of fire protection systems and other fire-hazard activities. It is how the FDNY reviews and approves the fire safety components of a building — fire alarm systems, sprinklers, standpipes, suppression systems, fuel and oil storage, and more.

    Unlike a DOB filing — which authorizes the construction work itself — an FDNY filing focuses specifically on whether a fire protection system is designed and installed to satisfy the NYC Fire Code. Most fire protection projects need both: a DOB job to permit the installation and an FDNY filing to approve and sign off the system.

    When you're ready to file, see our FDNY Filing Services. For the full range of agency filings, visit our NYC Filings hub.

    When an FDNY Filing Is Required

    An FDNY filing is triggered whenever a project installs, modifies, or removes a fire protection system, or involves a regulated fire hazard. Common triggers include:

    • Fire alarm systems — new installations, upgrades, or modifications to a building's fire alarm and detection system.
    • Sprinkler and standpipe systems — installing or altering automatic sprinkler systems or standpipe risers.
    • Fire suppression systems — clean-agent, kitchen hood (Ansul-type), and other special suppression systems.
    • Fuel and oil storage & tanks — installation, removal, or modification of oil-burning equipment and fuel storage tanks.
    • Standby and emergency generators — generators and the fuel storage that supports them.
    • Other fire-hazard activities — flammable materials storage, place-of-assembly life safety, and related regulated conditions.

    How the FDNY Filing Process Works

    FDNY filings follow a defined sequence. The process is generally slower and more exacting than DOB plan review, so completeness at each stage matters:

    1

    Application via FDNY Business

    A licensed design professional or authorized filing representative submits the plans and application through the FDNY Business portal, the department's online filing platform.

    2

    Plan Examination

    A Bureau of Fire Prevention plan examiner reviews the fire protection design against the NYC Fire Code and applicable standards for completeness and compliance.

    3

    Objections

    The examiner issues objections for anything requiring clarification, correction, or additional documentation. Each objection must be answered and the plans resubmitted before review continues.

    4

    Permit / Letter of Approval

    Once objections are cleared, FDNY issues its approval — commonly a Letter of Approval (LOA) — confirming the plans are accepted and the installation may proceed.

    5

    Acceptance / Witnessed Testing

    After installation, the system must pass an FDNY-witnessed acceptance test. An FDNY inspector observes the test on site to confirm the system performs as designed.

    6

    Sign-Off

    When the system passes and all conditions are satisfied, FDNY issues its final sign-off — a prerequisite for the Certificate of Occupancy on most projects.

    Common FDNY Filing Types

    Fire Alarm & Detection Systems

    Plans and approvals for new or modified fire alarm systems, including detection devices, notification appliances, and central-station monitoring. Among the most frequently filed FDNY jobs and almost always paired with a DOB filing.

    Sprinkler, Standpipe & Suppression

    Automatic sprinkler systems, standpipe risers, and special suppression systems such as clean-agent and commercial kitchen hood systems. Each requires plan approval and a witnessed acceptance test before sign-off.

    Fuel Storage, Tanks & Generators

    Installation, removal, or modification of fuel and oil storage tanks, oil-burning equipment, and standby generators. These filings address both fire-hazard storage and the equipment that depends on it.

    How FDNY Filings Relate to DOB

    FDNY and DOB run parallel, separate processes, and many fire protection projects require both. DOB issues the construction permit that authorizes physically installing the system; FDNY reviews and approves the fire protection design and performs the witnessed acceptance test. Neither agency's approval substitutes for the other's.

    Because FDNY plan examination tends to move slower than DOB's, the two filings can easily fall out of sync — leaving one agency waiting on the other and stalling the project. Coordinated filing keeps both jobs advancing together toward permits, sign-off, and ultimately the Certificate of Occupancy, which requires FDNY sign-off.

    For the full picture of NYC agency filings — DOB, FDNY, HPD, DOT, and more — see our Filings hub.

    Have an FDNY filing coming up?

    Learn more about our FDNY filing services or contact BVS for a free consultation. We'll review your fire protection scope and outline the fastest path from filing to sign-off.