Replacing bathroom vanity cabinet doors means tracing the old doors, drilling a 35 mm hinge cup in each new door, and hanging them so gaps stay even.
A warped vanity door shows its damage the moment steam hits the room, and the fix costs an afternoon rather than a contractor’s visit. The cabinet box almost never fails — only the doors and drawer fronts do. Measure the existing parts, order matching replacements, transfer the hinge positions, and you keep the vanity for the price of a few panels. The catch is hardware: concealed hinges need a cup hole in the same spot as the old door, and the standard cup measures 35 mm across (about 1-3/8 inches).
What You Need Before Ordering
The old doors are your template, so never toss them before the new ones arrive. Replacement doors are almost always custom-sized, so off-the-shelf stock rarely fits an older opening.
Measure the door, not the opening — door width and height run slightly larger than the cabinet face because of the overlay. Note:
- Height and width of each door, measured edge to edge.
- Hinge cup location — cup center distance from top and side edges.
- Screw-hole spacing on the mounting plate, if reusing hinges.
- Handle placement, plus which side the door swings from.
Label every piece. Doors and drawers from the same vanity can differ by fractions of an inch. Keep old parts until replacements are verified.
How to Transfer Hinge Holes
European-style concealed hinges need a 35 mm cup hole at the same distance from the door edge as the original. If keeping the same hinges, leave them on the cabinet frame and remove only the door.
Set the old door face-up, mark the cup center from the edge and top. Lay the new door beside it and copy the marks exactly. A 35 mm Forstner bit cuts a clean, flat-bottomed cup; a spade bit tears laminate. Wrap the bit with tape at the target depth — typically around 13 mm, though cup depth must match your hinge brand.
Drill pilot holes for hinge screws; cabinet wood splits easily at the door edge. If the layout moves the hinges, drill fresh screw positions.
| Task | Key Spec | Common Failure |
|---|---|---|
| Measure door | Edge-to-edge panel size | Measuring the opening instead |
| Hinge cup hole | 35 mm (1-3/8 in) diameter | Wrong bit, torn laminate |
| Hinge screws | Pilot holes at each screw | Skipped pilot splits the wood |
| Drawer front | Same measuring logic as doors | Front glued on, pried too hard |
| MDF finishing | Prime before painting | Raw MDF soaks up moisture |
| Door alignment | Even gaps top and bottom | Hung before paint cured |
| Sealing | Painted or sealed surface | Unfinished panel in a humid room |
Hanging Doors and Drawer Fronts Straight
Reinstall one door at a time, adjusting hinge screws until gaps read even. Most concealed hinges adjust in three directions — sideways, in and out, and up or down — without redrilling.
Drawer fronts follow the same measuring logic. A glued front needs a putty knife worked behind the panel; a nailed front comes off with careful prying. Attach the new front with screws, glue, or nails, then check the reveal.
Temporary guide blocks help: clamp a scrap board along the cabinet bottom edge, rest each door on it, and bottom reveals line up. Once even, tighten the hinge plates fully.
Compare finishes and materials against your bathroom’s humidity. A roundup of tested bath vanity replacement doors helps narrow the field when two products look identical on paper.
Materials, Sealing, and When to Skip the Swap
Raw MDF or unfinished wood will swell and peel in bathroom humidity. Prime MDF before painting, and let the topcoat cure fully before hanging — a wet edge smears, and soft paint chips. Sealed or moisture-resistant finishes hold up far better, per guidance from Cabinet Doors ‘N’ More and LX Hausys.
If exact replacements are hard to source, replacing just the edge banding rescues a door with worn laminate but solid structure. When the cabinet box has swelled or delaminated, a whole new vanity usually costs less than chasing parts. Lowe’s publishes a weekend-scale overview of the replacement cabinet door process if you want a second walkthrough.
FAQs
Do I have to remove the hinges from the cabinet?
No. If keeping the same hinges, leave them on the cabinet frame and lift the old door off the hinge arms. Only remove them if you plan to paint or refinish the frame.
Can I reuse the old drawers and doors as templates?
Yes. The old panels carry the exact size and hinge positions your replacements need, so hold onto them until the new pieces arrive and you have verified the match.
What if I cannot find doors that match my cabinet size?
Most replacement doors are custom-cut, so a perfect off-the-shelf match rarely exists. If custom panels are not an option, replacing edge banding on a sound door is a cheaper middle path. A badly swollen cabinet box usually means replacing the whole vanity.
References & Sources
- Cabinet Doors ‘N’ More. “How to Replace Bathroom Vanity Cabinet Doors” Supports the transfer method, hinge cup handling, and alignment steps.
- Lowe’s. “How to Replace Cabinet Doors in One Weekend” Supports the overall replacement sequence and measuring approach.
- LX Hausys. “Replacement Door for Bathroom Vanity” Supports moisture resistance and material guidance for bathroom panels.
