Medicine cabinets read as slightly old-fashioned right up until you live with one, at which point they become the piece of bathroom storage nobody ever regrets. All the clutter that otherwise colonizes the counter — razors, prescriptions, the electric toothbrush — disappears behind a mirror you needed anyway. The real decision isn't whether to add one — it's recessed versus surface-mount, a choice decided less by taste than by what's hiding inside your wall.
The difference in one minute
A recessed medicine cabinet sits inside the wall cavity: you cut an opening between the studs, the box slides in, and the mirrored door finishes nearly flush with the drywall, reading as a plain mirror from across the room. A surface-mount cabinet screws to the face of the wall and projects into the room, typically 10 to 15 cm. Inside, they do the same job; the differences that matter are the look and what installation demands of your wall.
Recessed: the built-in look, with conditions
The flush, built-in appearance is why designers specify recessed cabinets whenever they can: no box hanging over the vanity, no shadow line, nothing to bump a shoulder on in a tight powder room.
The catch is that the wall has to cooperate. A recessed medicine cabinet needs a stud cavity that is empty, deep enough, and structurally boring. Standard interior walls framed with 2×4 lumber give roughly 9 cm (3.5 in.) of depth, and most recessed cabinets want nearly all of it. Any of these disqualifies a wall:
- Plumbing. The wall behind a vanity very often carries supply lines, a drain, or the vent stack — precisely where you want the cabinet.
- Wiring. Switch legs and cable runs for sconces or outlets frequently share the same cavity.
- Exterior walls. In a Canadian climate these are packed with insulation and a vapour barrier; carving out a cabinet-sized void invites cold spots and condensation. Treat them as surface-mount territory.
- Structure. A cabinet wider than one stud bay means cutting a stud and framing a header — straightforward during construction, a real job afterward.
This is why recessed cabinets are happiest in new walls. Mid-renovation, with the studs exposed, framing a rough opening takes a carpenter minutes, and the electrician can run a feed for lighting at the same time. It's the same logic as an in-wall toilet carrier — trivial while the wall is open, disruptive once it's closed; our wall-hung toilet cost guide walks through that open-wall math. Retrofitting into a finished wall is possible, but budget for exploratory holes, possible reroutes, and drywall patching.
Surface-mount: installs anywhere
A surface-mount cabinet is indifferent to all of the above. It fastens to the studs through the back panel, the way you'd hang a heavy mirror, and doesn't care what's inside the wall. For a finished bathroom, a condo with concrete walls, a rental, or that insulated exterior wall, it's the practical answer — and often the only one.
It also quietly wins on storage: because the box isn't limited to the stud cavity, surface-mount cabinets are frequently deeper than their recessed cousins. The trade-offs are visual and spatial — the cabinet projects into the room, which is noticeable in a small bath, and the door swing needs clearance from side walls and sconces. Better designs soften the look with mirrored side panels so the box reads as intentional rather than tacked-on.
Quick comparison
| Recessed | Surface-mount | |
|---|---|---|
| Look | Flush, built-in, reads as a mirror | Projects from the wall |
| Wall requirements | Empty cavity, adequate depth, framing for wide units | Studs or blocking to screw into |
| Best time to install | New construction or open-wall renovation | Any time, any wall |
| Storage depth | Limited by the stud cavity | Often deeper |
| Exterior walls | Not recommended in Canada | No issue |
| Typical install effort | Carpentry, possibly trades | An afternoon with a drill |
Sizing it to the vanity below
A medicine cabinet mismatched to the vanity beneath it looks wrong even if nobody can say why. The working rule: keep the cabinet the same width as the vanity or a little narrower, and centre it on the sink rather than the cabinet box — sinks are often offset. Over a double vanity, a pair of cabinets centred on each basin almost always beats one enormous unit. Height-wise, keep the bottom edge clear of the faucet and backsplash zone while keeping the top shelf reachable for the household's shorter members.
If you're still choosing the base, settle on it first — browse bathroom vanities and let the cabinet width follow. And if a wall rules out a cabinet altogether, a well-sized unit from our bathroom mirrors collection plus storage elsewhere is a perfectly good plan B.
Features worth paying for
This is where the category has changed most. The gap between a builder-basic cabinet and a premium one is genuinely functional:
- Mirrored interiors. Mirror on the door's inside face and back wall bounces light and, with the door angled, shows you the back of your head — a small thing you'll use daily.
- Integrated lighting. LED strips at face height flatter and function better than a ceiling fixture, especially for shaving or makeup. Prefer external lighting? A pair of fixtures from our wall sconces collection flanking the cabinet does the same job.
- Defoggers. A heated pad behind the mirror keeps the door clear while the shower runs. Once you've had one, a fogged mirror feels like a design flaw.
- Interior outlets. The toothbrush and shaver charge out of sight and the counter stays clear. This needs an electrical feed, so plan it at rough-in.
- The quiet stuff. Adjustable glass shelves, soft-close hinges, and doors that can be hung to swing either way.
If you want the premium reference point, look at Sidler. The Swiss-engineered cabinets combine essentially all of the above in beautifully built units, and most designs come in both recessed and surface-mount versions — so the wall you have doesn't lock you out of the features you want.
So which should you buy?
If you're renovating with the walls open and the cabinet is going on an interior wall, go recessed — you'll never get a cheaper chance at the built-in look. If the walls are finished, the cavity is full of plumbing, or the only available wall is an exterior one, buy a good surface-mount cabinet and don't look back; the deeper storage is a genuine consolation prize. Either way, buy more capacity than you think you need. Both styles live in our bathroom storage collection, with more room-by-room planning advice in our guides.
Frequently asked questions
Can I put a recessed medicine cabinet in an exterior wall?
It's physically possible but a bad idea in most of Canada. The cabinet displaces insulation and interrupts the vapour barrier, creating a cold spot that invites condensation — and everything inside sits cold all winter. Use surface-mount on exterior walls.
How do I know if my wall can take a recessed cabinet?
You can't know for certain from outside. A stud finder maps the framing, and the sink, taps, and switches hint at where pipes and wires run, but the honest method is a small inspection hole where the cabinet would go. If you find plumbing or wiring, rerouting is a job for the appropriate trade — or a cue to go surface-mount.
Do lighted cabinets and defoggers need an electrician?
Usually, yes. Most integrated-lighting and defogger models are hardwired, so you need a feed at the cabinet location — easy during a renovation, more invasive afterward. Interior outlets always require proper wiring, and a licensed electrician keeps it safe and up to code.
Is surface-mount a downgrade from recessed?
No. Recessed wins on looks; surface-mount typically wins on storage depth, installs in an afternoon, and works on walls where recessing is impossible. A well-made surface-mount cabinet with lighting and a mirrored interior outperforms a basic recessed box every day of the week.