Custom Millwork: What a Shop Drawing Package Should Contain Before Anything Gets Cut
Key takeaways
- Custom millwork means drawn for your space and built to those drawings, not stock boxes trimmed to fit.
- A shop drawing package should show plans, elevations, sections, materials, hardware and every field dimension it relies on.
- Field measurement happens after framing and before fabrication. Measuring off design drawings is how counters end up short.
- Lead time is measured in weeks. Millwork approval belongs at the front of a project schedule, not in the middle.
The word custom gets used loosely. Plenty of jobs described as custom cabinetry are catalog boxes in catalog sizes with filler strips covering the gaps. That is a legitimate product and sometimes the right one. It is not the same thing as millwork drawn for your room and built in a shop to those drawings, and the difference shows up in the details: no fillers, ends that look like furniture, interiors laid out around what actually goes in them, and reveals that stay consistent across a whole run.
Whether we are building a service counter for a food-court unit or a wall of cabinetry in a house in East Brunswick, the process is the same and it starts on paper.
What a shop drawing package should contain
Shop drawings are not design drawings. Design drawings show intent. Shop drawings show construction: what gets built, from what, held together how, to what dimension. If you are approving a millwork package, this is the list to check it against.
- 1Plan view with overall and unit-by-unit dimensions, showing how the run fits the room and where it meets walls, columns and adjacent work.
- 2Elevations of every face, with door and drawer sizes, reveals, and the location of every pull, appliance and outlet.
- 3Sections through the critical parts, typically the counter edge, the toe kick, the top rail and any glass or lighting detail.
- 4Material schedule naming the substrate, the face material, the edge treatment and the finish, with brand and color where it matters.
- 5Hardware schedule listing hinges, slides, pulls, catches, locks and any specialty item, with model numbers.
- 6Notes covering grain direction, seam locations, blocking requirements and anything expected from other trades.
- 7Field dimension notes stating which dimensions are verified on site and which are still to be confirmed.
Materials, and what they cost you later
| Material | Best used for | Watch out for |
|---|---|---|
| Plywood carcass | Most casework, especially anything near water or carrying weight | Voids in cheap cores. Ask what grade is being used. |
| MDF | Painted doors and panels where a flat, seamless face matters | Weight, and its dislike of standing water. Not a base cabinet choice for a wet area. |
| Melamine or thermally fused laminate | Cabinet interiors and back of house, where durability beats appearance | Chipping at cut edges if the shop is not equipped for it |
| High pressure laminate | Commercial counters and heavy-use surfaces | Seam placement and edge detail decide whether it looks cheap |
| Solid hardwood | Face frames, edges, thick counters, anything that will get knocked | Movement with humidity. Wide solid panels need proper detailing. |
| Quartz or stone tops | Counters and service surfaces | Templated after cabinets are installed, so it always lands late in the schedule |
Hardware is the other place where a cheap decision is felt daily. Full-extension soft-close slides and quality concealed hinges cost more per box and are the components that get used thousands of times a year. On commercial casework the argument is even simpler, because a failed drawer slide in a service counter is a service disruption, not just an annoyance.
Field measurement is a separate step, and it is not optional
Design drawings assume walls are straight, square and plumb. They are not. In an older house, a 12 foot wall can wander half an inch. In a commercial unit, a column enclosure is rarely exactly where the plan says it is.
So millwork is field measured after framing and drywall are complete and before fabrication begins. That is a real gap in the schedule and it has to be planned for. Anyone who offers to fabricate off the design set and adjust on site is offering you scribes, shims and filler strips, which is the exact thing you were paying to avoid.
- Measure at multiple heights, because walls lean.
- Record where blocking is needed for wall cabinets, floating shelves and anything that will be leaned on.
- Confirm the location of every outlet, data point and plumbing stub before the shop cuts backs and bottoms.
- Check the floor for level along the whole run. A counter that follows a sloping floor looks wrong even when it is built perfectly.
Dry fitting, and why it saves the install date
We dry fit millwork in the shop before it goes to site. The run is assembled on a flat floor, doors and drawers are hung, hardware goes on, and everything is checked for fit, reveal and alignment. Problems found in the shop are fixed with the machinery ten feet away. The same problem discovered on site is a truck, a crew and a day.
“Install day should be boring. If it is interesting, something went wrong earlier and nobody caught it.”
Lead times and where millwork sits in the schedule
| Step | Typical duration | Depends on |
|---|---|---|
| Design intent agreed | 1 to 2 weeks | Layout locked, appliances and equipment selected |
| Shop drawings produced | 1 to 2 weeks | Complexity and number of units |
| Client and landlord approval | 3 days to 2 weeks | How quickly the package comes back marked up |
| Field measurement | 1 day | Framing and drywall complete |
| Fabrication | 3 to 6 weeks | Material availability, finish, shop load |
| Dry fit and finishing | 3 to 7 days | Finish system and cure times |
| Delivery and install | 2 to 5 days | Site access, elevator and delivery windows |
| Counter template and install | 1 to 2 weeks after cabinets | Stone fabricator schedule |
Read that table backwards from your opening date or your move-in date and you will see why millwork approval is a front-of-project activity. On commercial work with a fixed opening, we start shop drawings during the permit review period so fabrication can begin the moment field dimensions are available.
Questions worth asking any millwork supplier
- Are these shop drawings or design drawings, and who produced them?
- What is the carcass material and what grade, specifically?
- Which hardware, by manufacturer and model, and what warranty comes with it?
- Where do the seams fall, and which direction does the grain run?
- When will you field measure, and what has to be finished for you to do it?
- Is the work dry fitted before it leaves the shop?
- Who is responsible for blocking, cutouts and coordination with the electrician and plumber?
Empire Assemble builds custom millwork and casework for commercial and residential projects across New Jersey and Staten Island: service counters, display surrounds, menu-board bulkheads, back-of-house shelving, kitchen cabinetry, built-ins and finish carpentry. Because the millwork and the general contracting sit under one contract, the person building the cabinets and the person framing the wall they hang on work to the same set of dimensions.
Frequently asked questions
What is the difference between custom millwork and stock cabinets?
Stock cabinets come in fixed widths from a catalog and use filler strips to close the gaps. Custom millwork is drawn for your specific space and built to those drawings, which means no fillers, sizes that suit the room, interiors laid out for what you actually store, and consistent reveals across a run. Semi-custom sits between the two, offering sizing flexibility within a manufacturer's system.
What should shop drawings include?
Plans with dimensions, elevations of every face, sections through critical details, a material schedule, a hardware schedule with model numbers, notes on grain direction and seam locations, and a clear statement of which dimensions have been field verified. If a package is missing the hardware schedule or the sections, ask for them before approving.
How long does custom millwork take to build?
Fabrication is typically 3 to 6 weeks, plus 2 to 4 weeks in front of it for shop drawings and approval, and a field measurement step that cannot happen until framing and drywall are complete. Stone counters add another one to two weeks after cabinets are installed because they are templated on site.
Why does millwork have to be field measured?
Because walls are rarely straight, square or plumb, and floors are rarely level. Fabricating from design drawings and adjusting on site means scribes, shims and filler strips, which is exactly what custom millwork is supposed to avoid. Field measurement happens after the walls are closed and before the shop cuts material.
Do you build millwork for commercial projects?
Yes. We build service counters, display surrounds, menu-board bulkheads and back-of-house casework for retail and food-service build-outs, including franchise packages built to the brand's standard drawing set. The millwork is dry fitted in the shop before it ships so install day does not become a fabrication day.