NYC Building Code Chapter 33, end to end

What Chapter 33 is

Chapter 33 of the 2014 NYC Building Code (with subsequent amendments through 2026) is titled "Safeguards During Construction or Demolition." It is the chapter that defines how construction work has to be done safely inside New York City limits. Every NYC project is governed by some portion of Chapter 33, whether it's a one-story alteration or a forty-story tower. The largest projects are governed by all of it.

Chapter 33 is administered by the NYC Department of Buildings (DOB). Inspectors enforce it on site. Filings reference it. Stop work orders quote it. If you've ever been told "we have to do this because of Chapter 33," it was almost certainly true.

This guide walks the chapter section by section: what each one requires, when it applies, and where it shows up on a real NYC site.

Scope and applicability

Chapter 33 applies to:

• All construction, alteration, demolition, and similar operations within New York City limits
• Both new buildings and existing buildings undergoing work
• Both interior and exterior work where the work has hazard implications

The depth of Chapter 33's requirements scales with project size. A small interior alteration may invoke only a few subsections (e.g., dust control under §3303, basic fall protection). A new ground-up high-rise will invoke essentially every section.

The chapter recognizes a higher tier of project called a Major Building: generally any new building, full demolition, or major alteration that is 10 stories or 100 feet or taller. Major Buildings get the heaviest scrutiny, including the requirement for a licensed Site Safety Manager or Site Safety Coordinator (§3310).

§3301 — General requirements

§3301 sets the general frame for the chapter. It establishes:

• The chapter's scope and applicability
• Who is responsible for safety on a NYC construction site (the owner, the GC, the construction manager, and the licensed credentials assigned)
• The general duty to protect workers, occupants, and the public
• Definitions used throughout the chapter (Major Building, demolition, alteration, etc.)

§3301 doesn't itself impose specific operational requirements (those come in the later sections), but it's where the chapter's vocabulary is established.

§3303 — Public protection

§3303 is one of the most-enforced sections of Chapter 33. It governs how a construction site protects the public: the people walking past on the sidewalk, the pedestrians on the next block, the drivers on adjacent streets, the occupants of neighboring buildings.

The section breaks into several distinct requirement clusters. §3303.1 establishes the general requirement to protect the public from construction hazards and identifies the responsible party (the permit holder and the owner). §3303.3 governs sidewalk sheds: when they're required, their structural and dimensional specifications, lighting, drainage, and the inspection and maintenance obligations. §3303.4 governs fences and barricades around the construction perimeter, including the required fence height, signage posting requirements, and the fence's structural adequacy.

Key operational requirements across §3303:

• Sidewalk sheds for any project where construction extends above the second floor on a sidewalk-fronted building, or where falling-object hazard reaches the public realm
• Fences and barricades around the construction perimeter, meeting minimum height and structural requirements
• Protected pedestrian routes when sidewalks are blocked or compromised, with directional signage
• Lighting for sheds and pedestrian routes, at the specified footcandle levels
• Inspection and maintenance schedules for all of the above, documented in the SSM logbook

Most §3303 stop-work-order risk comes from operational lapses: a torn shed deck, a missing sign, a damaged barricade, lighting that's failed. These conditions are easy for DOB inspectors to spot from the public side of the fence. That's the entire point of the section.

§3304 — Site safety plans

§3304 governs Site Safety Plans (SSPs), the DOB-required document that describes how a project will be built safely. The section establishes:

• When an SSP is required: §3304.1 sets the applicability threshold, covering all Major Buildings and certain other designated projects
• Who must author the SSP: typically the DOB-licensed SSM or a Construction Safety Engineer with PE licensure, named in the filing
• What the SSP must contain: §3304.2 identifies the required elements, including site logistics drawings, pedestrian protection, fall protection plan, fire safety provisions, demolition sequence, and crane and hoist plan
• The filing path: DOB NOW for current filings
• Plan modification procedures: revisions must be filed and approved before changed conditions are implemented on site
• The SSM's responsibility to enforce the most-recently approved version every day

§3304 is where the Site Safety Plan requirement originates in the code. OSHA 29 CFR 1926 does not require a document equivalent to the NYC SSP. It's a NYC-specific addition to the federal floor.

For a deep dive on what's actually inside an SSP, see the Site Safety Plan checklist.

§3306 — Equipment, cranes, and hoists

§3306 governs construction equipment, primarily cranes and hoists but also other heavy machinery on site.

The section's structure covers: §3306.1 scope and applicability, operator credentialing requirements (the DOB Hoisting Machinery Operator license), pre-installation and in-service inspection schedules, permit classes (CD-5 for tower cranes, CD-6 for mobile cranes), DOB notifications for crane erection, jumping, and dismantle, and coordination requirements with the project's Site Safety Plan.

OSHA 29 CFR 1926 Subpart N governs cranes and derricks at the federal level. §3306 adds NYC-specific requirements: the HMO operator license, the specific permit classes, and the DOB notification triggers. Both apply on every NYC crane operation.

Crane operations are among the highest-risk activities on NYC sites. §3306 violations are uncommon but consequential. A single crane failure can produce a stop work order that lasts weeks.

§3308 — Demolition

§3308 covers demolition operations. NYC demolition has caused some of the most consequential construction events in the city's history: façade collapses, adjacent-property failures, and dust events.

The section's structure includes: §3308.1 scope and applicability (what constitutes "demolition" under the chapter), requirements for pre-demolition planning and inspection, the coordination obligation with §3309 for adjoining-property protection, demolition supervisor credentials, sequencing requirements in the Site Safety Plan, and dust and debris control.

Major demolition projects require a Site Safety Manager regardless of what (if anything) replaces the demolished structure. The trigger is the building being demolished, not the new structure. This is one of the most common threshold mistakes: teams think of SSMs as "construction" credentials and overlook the demolition trigger.

Under OSHA 29 CFR 1926 Subpart T, federal demolition rules also apply. The NYC §3308 requirements on supervision, sequencing, and adjoining-property protection are more specific than the OSHA floor.

§3309 — Adjoining property protection

§3309 governs how a construction or demolition project protects adjoining buildings and properties. The section requires:

• Pre-construction condition surveys of adjacent buildings, documented with photographs and a PE-signed report
• Specific protective measures: underpinning, shoring, monitoring, and lateral support where excavation or demolition affects adjacent foundations
• Formal notification to adjoining property owners before work affecting their property begins
• Documentation of pre-construction and post-construction conditions for every affected property

§3309 compliance documentation is the project's primary defense in adjoining-property damage claims, which are among the most common NYC construction disputes. A pre-construction survey that was thorough and well-documented settles most claims before they become litigation.

§3310 — Site Safety Managers and Coordinators

§3310 is the most-cited section of Chapter 33 and the one most projects deal with daily. The section's structure:

• §3310.1 establishes the definition of a Major Building and the general requirements that apply
• §3310.2 establishes the Site Safety Coordinator credential and its applicability to Major Buildings 7–14 stories or 100–199 ft
• §3310.3 establishes the Site Safety Manager credential and its applicability to Major Buildings 15+ stories or 200+ ft
• The section establishes required SSM logbook content, the on-site presence requirement (whenever active construction is happening), and the DOB's authority to designate additional projects as SSM-required regardless of height
• §3310.10 establishes the Concrete Safety Manager (CSM) credential for Major Buildings with concrete operations

The SSM or SSC named in the filing is personally credentialed and personally accountable to DOB. The credential doesn't transfer to an uncredentialed substitute. A lapsed license during construction is a direct stop-work-order trigger.

For the complete threshold analysis, see the BC §3310 Major Buildings guide.

§3315 — Concrete operations

§3315 governs concrete operations on Major Buildings and establishes the operational safety requirements that the Concrete Safety Manager enforces. The section covers:

• Pre-pour inspection requirements: formwork, shoring, reinforcement, and embeds must be inspected and signed off before any concrete is placed
• Formwork, shoring, and reshoring specifications, which must conform to an engineer-of-record formwork plan (typically referencing ACI 347 as the engineering standard)
• Pour card and slump test documentation at delivery
• Stripping operations: forms must not be stripped until field-cured cylinder breaks confirm the concrete has reached the specified stripping strength
• Reshoring removal: governed by the structural engineer's strip-and-reshore plan, which specifies the minimum strength at each removal stage

§3315 and §3310.10 together define the NYC CSM role. §3310.10 establishes the credential; §3315 defines what the credential-holder must do on site. Both sections apply on every Major Building concrete pour.

For credential-level depth, see the Concrete Safety Manager deep dive.

Other sections

The remaining sections of Chapter 33 cover specialized topics:

• §3302 — Definitions used throughout the chapter
• §3305 — Walls and barriers adjacent to excavations
• §3307 — Hoists and material lifts
• §3311 — Excavation, retaining walls, and geotechnical work
• §3312 — Construction superintendents (required on projects below the SSM/SSC threshold)
• §3313 — Structural stability during construction
• §3314 — Suspended scaffolds and façade access systems
• §3316 — Temporary structures including sheds and covered walkways
• §3317 — Special inspections during construction
• §3318 — Dust control and air quality
• §3319 — Construction lighting

Each has its own enforcement profile and inspection cadence. Most appear on Major Building projects in some form. §3312 (Construction Superintendent) is particularly relevant for mid-size projects below the §3310 SSM/SSC threshold.

Enforcement, penalties, and stop work orders

Chapter 33 is enforced primarily by DOB inspectors making scheduled and unscheduled site visits. Common enforcement outcomes:

• DOB violations. Issued via the Environmental Control Board (ECB). Civil penalties are set by violation class. Hazardous violations carry higher penalties and faster cure deadlines. Repeat or egregious violations carry larger fines and elevated scrutiny on all future site visits.
• Stop Work Orders (SWOs). Issued when an inspector finds an immediately hazardous condition. SWOs halt all work on the affected scope until lifted by abatement plan. Most are lifted within 1–3 business days when the underlying cause is fixed promptly and documented.
• License discipline. DOB can pursue formal discipline, including suspension or revocation, against licensed Site Safety Managers, Coordinators, and Concrete Safety Managers whose projects produce repeated or serious violations.
• Criminal referral. Reserved for the most serious cases: fatalities, fraud, repeated violations after SWO.

For a 24-hour playbook on responding to a stop work order, see DOB stop work orders: prevention and recovery.

How Chapter 33 fits with FDNY, OSHA, and LL196

Chapter 33 operates within a stack of other requirements. Every NYC construction site must comply with all of them simultaneously.

OSHA 29 CFR 1926 is the federal floor. It governs the same hazard categories as Chapter 33 (fall protection under Subpart M, scaffolds under Subpart L, cranes under Subpart N, demolition under Subpart T, concrete under Subpart Q) but sets federal minimums. Where Chapter 33 requires more, Chapter 33 controls. Where OSHA requires more, OSHA controls.

FDNY rules (in 3 RCNY) govern construction site fire safety: the F-89 Construction Site Fire Safety Manager certification, hot-work permits, fire watch, and standpipe operability. Chapter 33 references FDNY where relevant but the fire rules are administered separately by FDNY, not DOB.

NYC Local Law 196 (2017) requires SST (Site Safety Training) cards for workers and supervisors on most NYC construction sites. SST is administered by DOB separately from Chapter 33 but is part of the daily compliance picture: no un-carded worker on a covered project.

A licensed safety firm reads across all four. That's the core operational value.

Bottom line

Chapter 33 is the local legal frame for NYC construction site safety. §3303 governs public protection and drives daily enforcement. §3304 is where the SSP requirement lives. §3306 governs cranes. §3308 covers demolition. §3309 protects adjacent properties. §3310 establishes the SSM and SSC credentials. §3315 governs concrete operations, paired with the CSM credential under §3310.10. All nineteen sections, plus the FDNY, OSHA, and LL196 overlay, apply together on every NYC Major Building project.

Skilled Safety Management can review your DOB filing against Chapter 33 in under an hour and flag anything likely to come back as objections or violations. Send the filing through our contact form or call (212) 498-8863.

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.