How is this different from residential carpentry codes?

The distinction is the type of building rather than the tasks performed — carpentry on offices, retail buildings, and other commercial structures falls here, while the same skills applied to a house fall under a residential dwelling code.

Does interior tenant buildout work count as carpentry?

Yes, framing walls, installing doors and trim, and building out interior spaces in a commercial shell are standard tasks under this classification.

What if a company does both residential and commercial jobs?

Payroll should be tracked and reported separately by job type so each portion of the work is rated under the correct classification.

Workers' comp class code · Construction & Trades

Class code 5403 — Carpentry — General/Commercial

Carpentry work on commercial buildings not otherwise classified.

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This classification covers carpentry performed on commercial buildings that doesn't fit into a more specific residential dwelling code — office buildings, retail spaces, warehouses, and similar structures. Work ranges from structural framing and rough carpentry to interior buildouts, ceiling grid work, and finish trim in commercial tenant spaces. Commercial jobs often involve larger crews and more coordination with other trades working the same site simultaneously.

Payroll includes framers, finish carpenters, and laborers working on commercial projects, along with foremen who still perform hands-on carpentry duties. Commercial carpentry crews frequently work on multi-story buildings, which changes the equipment and access methods compared to single-family home framing.

Falls remain the leading severity concern, amplified on commercial sites by work at greater heights and around larger openings such as elevator shafts and stairwells before permanent guardrails are installed. Power tool injuries and material handling strains are common, and the presence of multiple trades on a commercial site adds struck-by and coordination-related hazards.

What code 5403 typically includes

Rough and structural framing on commercial buildings
Interior buildout and tenant improvement carpentry
Ceiling grid and soffit framing
Commercial trim, casework, and door installation
Multi-story rough carpentry coordination

Codes this one gets confused with

5645 — Carpentry — Dwellings

The same tasks performed on a one- or two-family home instead of a commercial structure fall under the residential dwelling code instead.

See code 5645

5610 — Carpenter — Shop Only

Fabrication done entirely in a shop before delivery to the commercial site is a separate, lower-exposure classification.

See code 5610

5437 — Cabinet Works & Installation

Cabinetry and millwork installation is sometimes billed separately from structural and rough commercial carpentry, depending on the scope of the crew's work.

See code 5437

What this code means for your premium

Commercial carpentry generally rates similarly to or slightly above residential dwelling carpentry, reflecting larger structures, multi-story access, and more concurrent trade activity on site.

Estimate your premium

Classification is not final until a carrier assigns it. Code numbers, wording and exceptions vary by state and rating bureau — several states run their own bureaus. This page is general reference written in our own words; your carrier's underwriter assigns the code based on your actual operations and payroll records.

Questions about code 5403

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