When does NYC require a Site Safety Manager?

What §3310 actually says

The legal trigger for a DOB-licensed Site Safety Manager in NYC sits in NYC Building Code §3310. The section defines what a "Major Building" is and establishes the credential and on-site presence requirements that apply once the threshold is met.

The threshold operates on two measurements independently: the building's height in feet and its number of stories above grade. Cross either one and the requirement applies. There is no waiver because your structure is "only" 14 stories but 215 feet, or "only" 195 feet but 16 stories. Either measurement puts you in.

§3310 also establishes requirements for:

• SSM logbook. Contents, documentation frequency, and retention.
• SSM on-site presence. When the SSM must be physically on site (whenever active construction is happening).
• Concrete Safety Manager (CSM) under §3310.10. Where structural concrete operations require a separately credentialed CSM. This is the section that triggers the CSM requirement.
• DOB designation authority. DOB's power to designate any project as SSM-required regardless of height, and the process by which that designation appears in DOB NOW.

For demolition projects: §3308 governs demolition operations and can independently require an SSM for major demolition of a building that meets the height or story threshold, separate from any new construction or alteration trigger.

Below both thresholds, the Construction Superintendent requirement may still apply under §3312. A Construction Superintendent is distinct from an SSM/SSC: it's a site management role, not a specialized safety credential, but it still creates DOB filing and presence obligations.

The thresholds: 200 feet, 15 stories, and the in-between

A few things people miss in that table:

• The thresholds are alternatives, not both required. A 16-story building that happens to be 195 feet tall still requires an SSM because the floor-count threshold is met.
• "Stories" means stories above grade. Cellars and certain below-grade levels may not count toward the threshold. Confirm with the project's filed application.
• Mechanical penthouses count. Don't try to argue your way out of a story by calling the top floor a "mechanical."
• The DOB can require an SSM regardless of height. Unusual or high-risk projects sometimes get designated for SSM coverage even if they don't meet the standard thresholds. This is rare but real.

What counts as a "Major Building"

The §3310 trigger applies to Major Buildings, which include:

• New buildings meeting the height or story threshold
• Full demolition of buildings meeting the threshold
• Major alterations to buildings meeting the threshold
• Vertical or horizontal additions that put the structure into the threshold
• Any project the DOB specifically designates as requiring an SSM

If your project profile matches one of these, the SSM requirement applies. If you're unsure, it's worth a 10-minute call with a licensed manager to confirm. Getting the credential wrong is one of the easier ways to lose three weeks at the start of a project.

Alterations and demolition: the often-missed cases

The cleanest case is a new ground-up high-rise: 30 stories, obvious SSM. The trickier cases:

Major alterations. A 22-story alteration that's "just" replacing the curtain wall and reconfiguring the lobby still meets the threshold. Buildings keep their height during alteration, and §3310 keeps applying.

Vertical additions. Adding a story to a 14-story existing building can push the structure into SSM territory partway through the project, especially if the existing building's height was measured just below the §3310 line. The credential requirement kicks in when the threshold is crossed, not retroactively. Plan for it in the filing.

Demolition. Full demolition of a building that itself meets the height or story threshold requires an SSM during the demolition operations. This is one of the most common oversights. Demolition project teams default to thinking of SSMs as "new construction" credentials and don't plan for the demolition SSM. §3308 covers this.

Mixed scope. A project with a new high-rise tower and an attached low-rise alteration typically needs an SSM covering the whole project, not just the portion of the site where the tall building sits.

LL196 reminder. On any of these projects that crosses into §3310 Major Building territory, every supervisor on site also needs a 62-hour SST Supervisor card under Local Law 196. The SSM credential does not substitute for the SST Supervisor card. They are separate credentials with separate renewal cycles. An SSM without a current 62-hour card on a covered project is a violation.

A decision tree for your project

Use this in 60 seconds:

1. Will the building be 15 stories or 200 feet or taller? → Yes: SSM required.
2. Will it be 7–14 stories or 100–199 feet? → Yes: SSC required.
3. Below those thresholds? → Generally no SSM/SSC required, but confirm against your DOB filing. Alteration scope and DOB designations can still trigger one.

If the answer to step 1 is yes, you also typically need:

• A Concrete Safety Manager (CSM) if the project includes structural concrete operations (§3310.10)
• An FDNY Fire Safety Manager (F-89) for high-rise construction sites
• A Site Safety Plan filed and approved with NYC DOB before permits issue

Smaller projects below the thresholds may still need fire watch personnel, OSHA-30 site presence, or other elements depending on hot-work operations and overall scope.

What an SSM actually does on site

The credential isn't a paperwork exercise. The licensed Site Safety Manager:

• Walks the site daily and documents conditions in the SSM logbook
• Signs off on the start of major operations: concrete pours, hoist erection, crane picks, scaffold builds, demolition phases
• Inspects sidewalk sheds, scaffolds, hoists, netting, and fall protection
• Coordinates directly with NYC DOB inspectors during scheduled and unscheduled visits
• Coordinates with FDNY for hot-work, gas, and welding operations
• Stops unsafe work (including trades not directly under the GC) when conditions warrant
• Files reports for incidents and near-misses
• Maintains permits, insurance certificates, and DOB-required postings on site

The license number on file with DOB is personal to that individual. They are accountable. That's what the credential is: a person who's legally responsible for what happens on the site.

When the SSM has to be in place

The SSM must be on site whenever active construction is happening. Practically, that means the manager has to be hired and named on the DOB filings before the project starts and has to be physically present during work hours (including any night, weekend, or off-shift work).

If you're reading this and you've already broken ground without an SSM in place, stop work and get one named on the filing immediately. DOB site visits while a project is short an SSM are one of the most common stop-work-order triggers in the city.

Bottom line

The NYC SSM requirement is straightforward at the threshold. 15 stories or 200 feet or taller, you need one. The complications come from alteration scope, vertical additions, demolition, and the occasional DOB designation. When in doubt, call a licensed manager and have the DOB filing reviewed before you mobilize.

Skilled Safety Management can confirm which credential your project requires in a 10-minute call at no charge. If your project needs an SSM, we can have one on site within 48 hours of contract signing.

Frequently asked questions

Working on a NYC project? Skilled Safety Management staffs licensed Site Safety Managers, Coordinators, Concrete Safety Managers, and FDNY Fire Safety Managers throughout the five boroughs. Send your project details through our contact form or call (212) 498-8863 for a fixed-fee proposal in 24 hours.