How to Hang a Bathroom Medicine Cabinet?

Hang a bathroom medicine cabinet by securing it to wall studs for surface mounts or framing it into a wall opening for recessed models.

Whether you’re replacing a dated mirror or adding storage to a half bath, mounting a medicine cabinet is a project most homeowners finish in an afternoon. The right method depends on one thing: the cabinet’s design. Surface-mount cabinets screw directly into wall studs. Recessed models slip inside a framed wall opening. Each has its own rules, and skipping the prep work is where most installs go sideways.

This guide walks through both methods so you can pick the right one, gather the right hardware, and avoid the mistakes that lead to a falling cabinet or a cut pipe.

Surface-Mount vs. Recessed: Which Installation Do You Have?

Kohler’s product pages list both styles: surface-mount medicine cabinets mount directly on the wall for easy installation, while recessed cabinets fit inside the wall cavity. Knowing which one you bought decides everything else.

Check the manufacturer’s label or spec sheet before you start. Kohler’s spec sheet for model K-99891, for example, lists the cabinet at 25-1/4 inches high and 3-5/8 inches deep — typical dimensions for a surface-mount unit that projects from the wall. Recessed cabinets are shallower so they fit inside stud bays.

Hanging a Surface-Mount Cabinet on Studs

Surface-mount cabinets are the simpler install. They hang on the wall like a heavy picture frame — but only if you hit the studs.

Bob Vila’s installation guide says to fasten the cabinet through holes in the back directly into studs or drywall anchors. Here’s the sequence that works:

• Center the cabinet above the sink and mark its position. Signature Hardware’s instructions say to center it over the sink first, then locate the studs.
• Find the studs with a stud finder and mark their edges. Mark the cabinet’s mounting-hole locations on the wall at those stud positions.
• Drill pilot holes to keep the screws from splitting the framing.
• Secure the cabinet with the manufacturer’s screws. Kohler’s instructions for one model specify four #8-15 x 1.5-inch panhead screws into framing. Another Kohler model uses a mounting bar: remove the bar, drill two holes, attach mounting clips with hex-head screws, set the cabinet on the bar, and lock the side brackets with M4 x 12 screws.
• Reattach doors if you removed them. Signature Hardware’s guide says to take the doors off for easier handling, then put them back once the cabinet is secured.

When the install is done, the cabinet should sit level and plumb. Use a level before you fully tighten anything — a crooked cabinet is impossible to fix after the last screw goes in.

If you’re weighing styles, our tested roundup of wall-mounted bathroom medicine cabinets compares the top models by build quality and ease of installation.

Installing a Recessed Cabinet in a Wall Opening

Recessed cabinets look built-in, but they demand more from your wall. Before you cut anything, confirm the cavity is deep enough and free of obstructions.

Measure your cabinet’s actual dimensions, not the opening size, and compare them against your wall cavity before cutting.

Follow these steps:

• Check for obstructions. A Home Depot installation guide says to confirm there are no electrical wires or plumbing pipes behind the wall before cutting. Turn off the power to any circuits near the opening first — several manufacturers require this explicitly before cutting or wiring an illuminated cabinet.
• Cut the opening to the cabinet’s exact dimensions. Mark the drywall with a pencil and use a drywall saw.
• Frame the opening if needed. Wayfair’s guide says recessed cabinets should be framed with 2×4 blocking when the cavity needs reinforcement. Some cabinet manuals recommend wood blocking for adequate support, and specify that mounting screws are for wood-frame installation only.
• Insert the cabinet and check it with a level. Use shims if the opening isn’t perfectly plumb.
• Secure it from inside with long screws and washers, per one Home Depot manual. If your cabinet includes a mounting bar, finish with the clips and side brackets as described above.

Caulk around the edges afterward to cover small gaps.

Clearance, Wiring, and the Mistakes That Ruin the Job

Three mistakes cause nearly every failed medicine cabinet install, according to the installation guides we reviewed.

Ignoring clearance. One Home Depot manual says to position the cabinet at least 3 inches above the faucet or vanity, and to verify the door swings freely without hitting light fixtures. Wayfair adds that if your cabinet is wider than the spacing between studs, professional help is the smart call.

Skipping the power shutoff. Cutting into a wall near electrical circuits without switching off the breaker is how people get hurt. Manufacturers state this plainly in their instructions, and it’s also required by local codes and NEC rules for any wiring connections.

Wrong fasteners for the wall type. Screws rated for wood framing fail in hollow drywall. Powder-actuated fasteners meant for concrete damage wood studs. One Wayfair guide notes that recessed cabinets are often finished using the same surface-mount hardware steps after the cabinet sits in the wall — so the wall type matters for the final securing step too.

Wire up an illuminated cabinet only after it’s secured, and follow the manufacturer’s wiring diagram. Local electrical codes apply, so check them before running any new circuits. For the practical installation questions most homeowners face, these steps cover the full job:

Both installations end the same way: a level cabinet, doors that swing freely, and a secure mount that won’t pull out of the wall under the weight of toiletries.