Casework generally means cabinets, counters, storage units, and similar box-based assemblies. Millwork is a broader term that can include casework as well as trim, paneling, doors, built-ins, and other fabricated architectural wood components.
That distinction is useful, but it is not universal. Designers, builders, manufacturers, and owners sometimes use the words differently. On an actual project, the drawings, specifications, scope sheets, and contract—not a casual definition—determine where the work belongs.
What counts as casework?
Casework is organized around cases or cabinet bodies. Typical examples include base cabinets, wall cabinets, tall cabinets, storage and display units, reception storage, laboratory or institutional cabinets, and their doors, drawers, shelves, hardware, and work surfaces when included in the specified scope.
Casework may be manufactured as a catalog product or custom fabricated for a specific construction project. It may use wood veneer, decorative laminate, solid wood, engineered panels, metal components, glass, solid-surface materials, and specialized hardware.
What counts as millwork?
Millwork can include running trim and mouldings, wall and ceiling paneling, custom doors and frames, ornamental components, bars, benches, feature walls, mantels, built-ins, and other shop-fabricated architectural work. In common practice, casework may sit inside that broader category.
Are kitchen cabinets millwork or casework?
They are clearly casework. They may also be described as millwork when a project uses that term broadly or includes them in a coordinated architectural woodwork package. The more useful questions are: Are the cabinets stock, manufactured, or custom? Who is responsible for design development, field verification, fabrication, countertops, hardware, finish, delivery, and installation? Which drawings and specification sections govern?
Why the distinction matters
- Bidding: Different suppliers or subcontractors may carry casework, trim, doors, countertops, and installation.
- Submittals: Cabinet elevations, hardware, finish samples, veneer layouts, and trim profiles may require different review paths.
- Scheduling: Field dimensions, rough-in work, flooring, ceilings, equipment, and delivery access affect different assemblies in different ways.
- Standards: A specification may cite a standard that applies to one product category but not another.
- Closeout: Care information, warranties, attic stock, and adjustment responsibilities should follow the defined scope.
How industry standards use the terms
The AWI glossary defines architectural woodwork and casework for use with its standards. AWI also publishes a dedicated architectural wood casework standard, while millwork and wood trim are addressed separately. These references are valuable for shared terminology, but the applicable standard and edition must be expressly incorporated into a project.
A practical way to organize a scope
List the work by assembly and location instead of relying on one umbrella word. Identify cabinets, countertops, paneling, trim, doors, hardware, glass, metal supports, finish, blocking, field measurements, delivery, and installation. Then assign responsibility and reference the controlling details for each item.
Read What Is Millwork?, use the custom millwork specification checklist, or explore CRMM’s Architectural Millwork and Cabinets & Casework pages.
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