How to Install a Wall-Mounted Medicine Cabinet

Medicine cabinets seem simple until you realize the wall behind your bathroom mirror is load-bearing real estate. Get this wrong and you're looking at a cabinet that sags, tilts, or—worse—crashes down when someone leans on it. The difference between a job that lasts twenty years and one that fails in two is studs. You need them, you need to find them, and you need to hit them dead-on. A properly installed cabinet feels rock-solid when you open and close it, stays plumb without any shimming tricks, and actually holds the weight of bottles, medications, and whatever else you stash in there. This isn't complicated work, but it demands precision in two places: finding those studs and getting the height right the first time.

1. Find Your Studs First. Run a stud finder horizontally across the wall where you plan to install the cabinet, marking the center of each stud you find with a pencil. Check your markings by tapping the wall—studs sound solid, drywall sounds hollow. Mark studs on both sides of where your cabinet will sit so you have anchoring options. If the cabinet is narrower than the stud spacing, you'll need to use heavy-duty toggle bolts or find studs that flank the cabinet width.
2. Mark Eye Level. Most medicine cabinets hang at 48 to 60 inches from the floor to the center of the cabinet—this centers it at typical eye level for an average-height person. If you have a mirror below the cabinet, use the top of that mirror as your baseline. Use a level to draw a horizontal line across the wall at your target height using a pencil. This line is where the top of the mounting bracket or French cleat will sit.
3. Pick Your Hardware Strategy. If your marked studs align with where the cabinet's mounting points need to go, you'll use wood screws directly into the studs. If studs are offset, you have two options: use heavy-duty toggle bolts rated for your cabinet's weight, or install a French cleat (two interlocking wooden strips) that distributes weight across multiple stud connections. French cleats are stronger for heavier cabinets and more forgiving of minor height errors. Mark the exact screw hole locations on the wall using the cabinet's template or by holding the cabinet in place and marking through the holes.
4. Mount the Wall Hardware. If using a bracket: Position the bracket on your marked line, align the screw holes with the studs you marked, and drill pilot holes slightly smaller than your fastener diameter. Drive 3-inch wood screws or lag bolts through the bracket into the studs—use at least two anchor points. If using a French cleat: Install the wall-mounted cleat (the piece with the upward-facing lip) first by driving screws through its screw holes into the studs. Use at least three screws per stud, staggered vertically. Check that the cleat is level before moving forward.
5. Prep the Cabinet Back. Most medicine cabinets come with a hanging bracket that mounts to the back of the cabinet box, or with pre-drilled holes for a French cleat. Follow the manufacturer's template exactly. If there's a template, tape it to the back of the cabinet and drill through the marked holes. Screw the mounting bracket or the mating cleat piece onto the back of the cabinet using the screws provided. Make sure it's tight—nothing shifts or rattles when you shake the cabinet.
6. Hang It Up. If using a bracket: Align the cabinet's bracket with the wall-mounted bracket and slide or hook it into place, then secure with the locking screws provided by the manufacturer. If using a French cleat: Lift the cabinet and slide its lower cleat down onto the upper cleat mounted to the wall, lowering it slowly until it's fully seated. The cabinet should feel snug and immobile.
7. Verify Perfect Plumb. Place a level on top of the cabinet and check for plumb (vertical) and the horizontal surface for level. Check both the left-to-right and front-to-back planes. If the cabinet tilts, do not attempt to shim it with shims behind the bracket—that's a band-aid. Instead, remove the cabinet, adjust the wall-mounted bracket or cleat so it's perfectly level, and rehang. Take your time here; a tilted cabinet looks wrong from the moment someone walks into the bathroom.
8. Add Safety Fasteners. Some cabinets have a center-mounted locking mechanism, lower stability pins, or anti-tilt brackets. Install these according to the manufacturer's instructions. Tighten all fasteners firmly but don't over-torque—you can crack plastic hinges or strip mounting points by applying too much force.
9. Test the Door Swing. Open and close the cabinet door slowly a few times. It should swing smoothly without binding or creaking. If the door rubs or catches, the cabinet may have shifted during installation—remove it, recheck the wall bracket for level, and rehang. Check the gap between the door and frame—it should be even all the way around. If hinges are adjustable, tweak them now to center the door properly.
10. Seal the Perimeter. Once the cabinet is secure and tested, caulk the perimeter where the cabinet meets the wall using paintable silicone caulk. This seals out moisture, which is critical in a bathroom. Run a smooth bead along all edges, let it cure per the manufacturer's instructions, then paint it to match your wall if needed. Seal any large gaps with caulk—don't leave air pockets that will collect dust and moisture.
11. Install Shelves. If your cabinet comes with removable shelves, install shelf pins or supports in the pre-drilled holes according to the manufacturer's layout. Place shelves at comfortable heights—leave at least 6 inches between shelves for bottles and jars. Don't overload the bottom shelf; distribute heavier items across multiple shelves to prevent sagging or tipping.
12. Organize Your Essentials. Start by grouping items by category: medications together, skincare together, first-aid supplies together. Place heavier items like razors or bottles on lower shelves, lighter items on upper shelves. Keep medications and anything toxic or age-inappropriate on higher shelves away from children's reach. Make sure nothing blocks the door from closing fully, and don't overstuff—a stuffed cabinet is harder to maintain and medicines stored in a crowded, humid environment degrade faster.