Custom Interior Wood Doors Made to Size: What to Specify

Everything you need to specify when ordering interior wood doors built to exact opening sizes.

Custom Interior Wood Doors Made to Size: What to Specify

Standard door sizes rarely fit a considered interior. Taller ceilings, custom openings and continuous detailing all push toward doors built to exact dimensions. Ordering custom interior wood doors made to size is straightforward once you know what information the shop needs and which decisions matter most.

Why made-to-size matters

A made-to-size door is fabricated to the actual opening rather than trimmed down from a stock blank. This preserves proportion, keeps stile and rail widths balanced, and allows oversized heights that standard doors cannot reach without looking cut down. For rooms where doors read as architecture, the difference is immediately visible.

Dimensions to provide

Give the shop the finished opening dimensions and let them work back to the door size, accounting for clearances and the frame. At minimum you will need:

- Rough or finished opening width and height - Wall thickness for jamb depth - Swing direction and handing - Whether the door is single, pair or part of a larger run

If doors sit alongside paneling or built-ins, share those details too so reveals stay consistent.

Species, cores and construction

The visible species sets the look; the core sets the performance. Solid stile-and-rail construction suits stained hardwood doors and traditional profiles. Engineered cores with veneer faces stay flatter over large heights and resist seasonal movement. For tall doors especially, core stability is worth prioritizing over solid-throughout construction.

Profiles and panel layout

Decide early whether doors are flat-panel, raised-panel, flush or grooved. Panel proportions should relate to the door height, which is exactly why made-to-size doors look right where stock doors look stretched. A shop that draws each door will show panel layouts for approval before cutting.

Hardware prep

Specify hinge type and locations, lock or latch prep, and any flush-bolt or magnetic catch requirements before fabrication. Factory hardware prep is cleaner than field mortising and keeps the finish intact. Provide hardware cut sheets so the shop machines to the exact templates.

Finish

Doors can arrive primed, finish-sanded for site finishing, or fully finished from the shop. Shop finishing under controlled conditions generally yields a more even result, particularly for stained work and dark colors that reveal every imperfection.

Lead times and ordering

Made-to-size doors are fabricated per order, so plan for a multi-week window covering drawings, approval, build and finish. Lock the schedule early when doors are on a critical path for trim and paint.

A fabricator like Vertical Custom Supply, working to the trade, will handle doors as part of a coordinated package rather than a one-off, which keeps reveals, species and finish consistent with the surrounding millwork. The goal is doors that read as part of the room, sized and detailed to belong.