A cracked mirror or a sagging cabinet door does not mean you have to rip the whole unit out of the wall. A medicine cabinet door replacement lets you keep the recessed box and its shelving while fixing the one part that actually failed, saving you the drywall repair a full swap demands. The trick to a clean medicine cabinet door replacement is measuring correctly and identifying your hinge style before you buy anything, because those two details decide whether a new door bolts right on or leaves you improvising.
Part of our Kitchen Remodeling guide — explore the full guide →
When a Medicine Cabinet Door Replacement Makes Sense
Replacing just the door is the smart move in a few common situations. If the mirror is cracked or the silvering is desilvering (those black spidery edges), the door is the problem, not the cabinet. If the hinges have worn loose and the door sags or won’t close flush, a new door with fresh hinges fixes it. Cosmetic dating is another good reason: a builder-grade beveled mirror can become a modern frameless or framed piece for a fraction of a full remodel.
There’s also a real cost argument. A door-only swap runs $40 to $150 in parts, while a new recessed cabinet plus the labor to remove the old box, patch and paint the wall, and set the new unit can easily hit $300 to $600 or more. When the only thing wrong is the mirror or the hinges, replacing the whole cabinet is throwing money at a problem the door alone solves.
Full replacement only makes sense when the cabinet box itself is rusted, warped, or the wrong size for a redesign. As long as the box is sound and the opening works for you, a door-only swap keeps the job to an hour or two with no patching, priming, or retiling around the frame.
Measuring for a Replacement Door
Accurate measurement is where most botched jobs start. You are not measuring the wall opening; you are measuring the existing door and the cabinet frame. Record these:
- Door height and width: measure the door itself, corner to corner, to the nearest 1/16 inch
- Frame opening: the visible cabinet face the door covers or sits within
- Overlay vs inset: note whether the door overlaps the frame edges or sits flush inside it
- Hinge locations: distance from the top and bottom to each hinge center
Take a clear photo of the hinge attachment before you disassemble anything. Many manufacturers, including common brands like Jensen, Robern, Kohler, and NuTone, sell replacement doors keyed to specific cabinet models, so the model number stamped inside the box is gold if you can find it.
Identifying Your Hinge Type
Hinges are the make-or-break detail. Medicine cabinet doors use several styles, and matching yours determines whether a new door aligns:
- Piano hinge: a single continuous hinge down one side, very common on older units
- Concealed European hinges: cup-style hinges hidden inside, adjustable for alignment
- Pivot hinges: top-and-bottom pins the door rotates on, common on frameless mirrors
- Surface-mount butt hinges: visible exterior hinges on some framed cabinets
Concealed European hinges are the friendliest for a swap because they have built-in adjustment screws that let you dial in a perfect gap after mounting. Pivot-hinge frameless doors are trickier; the replacement mirror must match the pivot spacing exactly.
Sourcing a Matching Door
You have three paths. First, order the exact factory replacement door from the manufacturer using the model number; this is the cleanest fit if the cabinet is a known brand and still supported. Second, buy a universal or aftermarket door sized to your opening and adapt the hinges. Third, for a frameless mirror, have a local glass shop cut a replacement mirror to your dimensions, which is often the cheapest fix at $30 to $80 for a standard size.
If you cannot find the original, a common workaround is to replace the whole door assembly with a new frameless mirror and a pair of modern pivot or spring hinges. Just confirm the new door’s weight is within the hinge rating so it doesn’t sag over time.
Step-by-Step Door Swap
With the right door in hand, the removal and install go quickly:
- Empty the cabinet and lay a towel in the sink to protect it and catch any dropped screws.
- Open the door fully. For concealed hinges, unclip or unscrew the hinge from the cabinet-side mounting plate. For pivot hinges, support the door and slide the pivot pins free.
- Set the old door aside carefully, especially if the mirror is cracked; wear gloves.
- Attach the new hinges to the replacement door if they didn’t come pre-installed, matching your measured hinge centers.
- Mount the door to the cabinet, then use the hinge adjustment screws (on European hinges) to level the gap and get the door closing flush.
Take your time on the alignment. A door that closes with an even reveal on all sides is the sign of a job done right, and the adjustment screws make that achievable in a few minutes of tweaking.
Handling Recessed vs Surface-Mount Cabinets
The mounting style changes your access. A surface-mount cabinet hangs on the wall like a box, so you have room to work around it. A recessed cabinet sits inside the wall cavity between studs, with only the door and a thin frame protruding. For recessed units, you work entirely from the front, which is fine for a door swap since you are not touching the box.
This is exactly why door-only replacement beats full replacement on a recessed cabinet: pulling the whole box out means dealing with the rough opening in the drywall, and a slightly different-sized new cabinet leaves you patching and painting. Keeping the box and swapping only the door sidesteps all of that.
Upgrading While You’re At It
A door swap is the perfect moment to upgrade beyond a plain mirror, since you’re already working on the cabinet. Consider a few worthwhile changes. A soft-close hinge kit adds a gentle, quiet close that keeps the door from banging; European concealed hinges with a built-in soft-close mechanism run $15 to $30 a pair. If your bathroom fogs up, a defogging mirror pad wired to the vanity light keeps the glass clear, though that requires an electrical connection and is best planned before you close things up.
You can also change the look entirely. Swapping a beveled builder mirror for a frameless polished-edge mirror modernizes the whole vanity, while a framed door in a finish that matches your fixtures ties the room together. If you want more light, some replacement doors integrate LED edge lighting. Just confirm any lighted or defogging option has a compliant power source nearby and that the added weight stays within your hinge rating, because these features make the door heavier than a plain mirror.
A few installation issues come up again and again on these swaps. If the new door won’t sit flush, the hinge cup depth or the mounting-plate height is slightly off; European hinges have three adjustment screws (depth, height, and side-to-side) that fix nearly any minor misalignment in a couple of minutes. If the door swings open on its own, the cabinet isn’t quite plumb or the hinges lack a self-closing spring; shimming the cabinet or switching to spring hinges solves it.
A door that binds or rubs the frame usually means it’s a hair too large for the opening, common when you order a universal door slightly oversize; a cabinet shop or even careful sanding on a wood-framed door can trim it, though you can’t trim a glass mirror, so measure twice before ordering glass. And if the mirror clips loosen over time, a dab of clear mirror mastic (not regular construction adhesive, which can damage the silvering) re-secures it. Match the fix to the symptom and most door problems resolve without buying anything new.
Cost and Final Tips
Budget-wise, a factory replacement door runs $40 to $150 depending on brand and size, a custom-cut glass mirror is $30 to $80, and universal doors fall in between. That is a fraction of a new recessed cabinet plus install. If the mirror is simply cracked, price a glass-shop cut against a full door; often the glass alone reused in your existing frame is the cheapest route.
Before you finish, confirm the door clears the medicine bottles and shelves when it swings, tighten every screw, and clean the new mirror with an ammonia-free cleaner to avoid streaks. Done right, a door-only swap looks like a brand-new cabinet for well under a hundred dollars in most cases.
