The short answer: most American bathrooms cannot take a genuinely recessed medicine cabinet without modifying the wall. A standard 2x4 stud wall gives you about 3.25 in of usable cavity depth once drywall is accounted for. Most lighted medicine cabinets are 4 to 5 in deep. The arithmetic does not work, and no amount of careful measuring changes it. Every cabinet in our LED medicine cabinet range is built at 4.6 in deep, so this applies to ours as much as anyone's.
That leaves three honest options: a slim cabinet under 3.25 in, a surface mount cabinet, or opening the wall and rebuilding the framing. This guide covers which one applies to your bathroom and how to tell before you buy.
Recessed vs surface mount at a glance
| Recessed | Surface mount | |
|---|---|---|
| Wall work | Cut drywall, often cut or reframe studs | None — screws to the wall |
| Depth needed in wall | Full cabinet depth | Zero |
| Projection into room | ~1 in (door only) | Full cabinet depth (3–5 in) |
| Works on a load-bearing wall | Only with an engineered header | Yes |
| Works over tile | Requires cutting tile | Yes |
| Works in a rental | No | Yes |
| Works with plumbing/wiring in the wall | Usually not | Yes |
| Storage depth | Limited by wall cavity | Whatever the cabinet is |
| Reversible | No | Yes |
| Typical install time | Half a day to a day | 30–60 minutes |
Recessed looks better. Surface mount is possible more often. That is the whole trade, and most buying guides skip the second half of it.
The wall depth problem, in numbers
This is the section that decides your purchase, so here are the actual figures.
What your wall gives you:
| Wall framing | Raw cavity depth | Usable after finishing |
|---|---|---|
| 2x4 (standard interior wall) | ~3.5 in | ~3.25 in |
| 2x6 (exterior or plumbing wall) | ~5.5 in | ~5.25 in |
A "2x4" is not two inches by four inches. Dimensional lumber is milled down: a 2x4 actually measures 1.5 × 3.5 in. The 3.5 in is your cavity depth, and drywall thickness plus the cabinet's own mounting flange eats into it.
What cabinets need:
| Cabinet class | Typical depth | Fits a 2x4 wall? |
|---|---|---|
| Slim / shallow recessed | 3–3.25 in | Yes, barely |
| Standard recessed | 3.5–5 in | No |
| Lighted / LED medicine cabinet | 4–5.5 in | No |
| Deep storage | 5–5.5 in | Only in 2x6 framing |
Our own LED medicine cabinets sit at 4.6 in deep. That is typical for a lighted cabinet — the carcass has to hold shelves, wiring, a driver for the LEDs, and a demister element behind the mirror. It will not recess into a standard 2x4 wall without building the wall out.
We would rather tell you that up front than have you cut a hole and discover it.
Stud spacing sets your maximum width
Even if the depth works, width is constrained by framing.
Wall studs in North American construction sit at 16 in on-center. That means the clear opening between two adjacent studs is about 14.5 in.
A recessed cabinet that fits between two studs without cutting anything is therefore limited to roughly 14 in of cabinet width — which is why so many older recessed medicine cabinets are narrow.
To go wider, a stud has to be cut and a header installed to carry the load above the opening. On a non-load-bearing wall this is routine carpentry. On a load-bearing wall it is structural work, and in most jurisdictions it needs a permit.
This is the practical reason our cabinets are built at 24, 30 and 36 in wide: at those widths you are cutting studs whether you recess or not, so we designed them to be mounted on the surface and finished on every visible face. The same widths are available made to order when a stock size will not fit the wall.
Before you assume you can recess a wide cabinet, find your studs and check what is inside the wall:
- Run a stud finder across the full width you want, not just the centre
- Check for plumbing — the wall behind a vanity very often carries the drain and supply lines
- Check for electrical — there is usually a circuit feeding the vanity light directly above
- Check whether the wall is load-bearing before cutting any stud
A wall with a vent stack in it cannot be recessed into at all, at any width. That is common on the wall behind a vanity and it is the single most frequent reason a planned recess install gets abandoned halfway.
When to choose recessed
A recessed medicine cabinet is the right call when all of these are true:
- The wall is not load-bearing
- The wall is framed 2x6, or you accept building the wall out
- There is no plumbing, ductwork or vent stack in the cavity
- You can reroute or avoid any electrical in the opening
- You are not working over tile you want to keep
- You own the property
The payoff is real: a recessed cabinet projects only about an inch into the room, which matters in a bathroom where the vanity is close to the opposite wall or where a door swings nearby. It reads as part of the wall rather than an object hung on it. If your wall will take it, the made-to-order range can be sized to the opening you have.
A recessed medicine cabinet without a mirror is also an option some people want — a plain cabinet door, with a separate mirror elsewhere. A medicine cabinet no mirror recessed into the wall is a small part of the market; most recessed units are mirrored, because the medicine cabinet has historically doubled as the bathroom mirror. Putting a bathroom mirror cabinet in wall framing is, either way, the same job.
When to choose surface mount
A surface mount medicine cabinet — also listed as a wall mount, or as a bathroom medicine cabinet wall mounted — is the right call, and often the only call, when any of these are true:
- Standard 2x4 framing and you want a cabinet deeper than 3.25 in
- Anything in the wall: plumbing, wiring, ducting, a vent stack
- Load-bearing wall
- Tiled wall you do not want to cut
- Rental, or any install you may need to reverse
- You want the storage depth a shallow recessed unit cannot give
Most surface mount units are mirrored: a surface mount medicine cabinet with mirror does the same job as the recessed equivalent without touching the wall structure. Mirrored medicine cabinets surface mount installed are also the standard retrofit when an old recessed unit is removed and the cavity is no longer usable.
The objection people raise: a surface mounted cabinet shows its sides, and on most cabinets those sides are bare metal or unfinished board. It looks like a box screwed to the wall, because it is.
That is a manufacturing decision, not a law of physics. A cabinet built with mirrored side panels reads as a finished object from every angle. Ours ship that way as standard — HYPERION and CASTOR both have mirrored sides, so whether you cut them into the wall or hang them on it, there is no unfinished face to look at.
The second objection: projection into the room. A 4.6 in cabinet sticks out 4.6 in. Before you buy, stand at your vanity and hold a ruler out from the wall at eye level. In most bathrooms it disappears; in a very narrow bathroom where you turn sideways past the vanity, it will not.
Medicine cabinet sizes and dimensions
Once you know which mounting type applies, the size question gets simpler.
Standard medicine cabinet size in the North American market clusters around:
| Width | Typical use |
|---|---|
| 16–20 in | Fits between studs without cutting; small bathroom or powder room |
| 24 in | Single vanity up to 30 in |
| 30 in | Single vanity 30–42 in |
| 36 in | Single vanity 42–48 in, or one of a pair over a double vanity |
| 48 in+ | Double vanity, usually as two cabinets |
Height is usually 26–32 in, with 30 in the most common.
Medicine cabinet dimensions standard for depth: 3.25 in for slim recessed, 4–5.5 in for surface mount and lighted units.
Our in-stock range is built at 24 × 30 in, 30 × 30 in and 36 × 30 in, all at 4.6 in deep.
Two sizing rules worth following:
- The cabinet should not be wider than the vanity below it. Equal width or slightly narrower reads as intentional; wider reads as a mistake.
- Medicine cabinet height above the floor: aim to put the centre of the mirror at roughly eye level for the people using it, which typically puts the bottom edge of the cabinet 48–52 in off the floor. If it sits above a vanity, leave at least 4–6 in between the countertop and the cabinet bottom so the faucet has clearance. Our guide to bathroom mirror height covers the same measurement for a plain mirror.
For a small bathroom, a 16–20 in cabinet that fits between studs is the one case where recessing is genuinely easy — no stud cutting, no header, minimal work. If your bathroom is tight and you want recessed, buy narrow.
Lighted medicine cabinets: what changes
Adding light to a medicine cabinet changes three things about installation.
1. It needs power. Either a hardwired connection inside the wall, or an outlet the cord can reach. Hardwiring is cleaner and is what most installers do. On a recessed install you need that circuit to arrive inside the cavity, which is one more thing that has to be right before you cut.
2. It gets deeper. The LED driver, the wiring channel and a demister element all live in the carcass. This is why almost no lighted medicine cabinet is under 4 in deep, and why the 2x4 wall problem hits this category hardest.
3. Light placement matters more than light quantity. If you are weighing a cabinet against a plain LED bathroom mirror, the same optics apply. This is worth understanding before you choose a model, because the two common arrangements do different jobs.
Our two in-stock lighted cabinets make the comparison concrete — same 60 W, same 24 in width, different optics:
| HYPERION | CASTOR | |
|---|---|---|
| Light arrangement | Continuous band around the door perimeter | Two vertical bars, one each side |
| Output at 24 in | 3,718 lumens | 2,314 lumens |
| Power | 60 W | 60 W |
| Best for | Lighting the whole bathroom | Grooming — shaving, makeup |
HYPERION produces roughly 60% more total light on the same wattage, because a perimeter band spreads output across the entire door. CASTOR concentrates less light exactly where your face is.
That is not a better-versus-worse comparison. Overhead lighting casts shadows under the brow, nose and chin — precisely where you need to see when shaving or applying makeup. Two vertical bars at eye level fill those shadows in, which is the arrangement theatrical dressing rooms have used for a century. If your bathroom already has decent overhead light, side bars do the grooming job better. If the cabinet has to light the room, take the perimeter band.
Both of ours also carry a separate interior light so the cabinet is not a dark box when you open it, and CRI 90+, which is what determines whether skin tones and colours look accurate rather than washed out.
Recessed medicine cabinet installation: what the job actually involves
If you have confirmed the wall will take it:
- Locate studs and map the cavity. Stud finder across the full intended width, then a small inspection hole before committing to the full cut.
- Cut the drywall opening to the manufacturer's rough opening dimensions — not the cabinet's outside dimensions.
- Frame the opening. Cut studs only after confirming the wall is non-load-bearing; add a header and sill, and blocking on the sides to screw into.
- Bring power in if the cabinet is lighted — by an electrician where local code requires it.
- Set the cabinet, shim it plumb, and fasten through the side flanges into the blocking.
- Patch, tape and finish the drywall around the opening.
Budget most of a day for a first-time install, and expect the drywall finishing to be the part that takes longer than you planned.
Surface mount, by comparison: find the studs, mark level, drive fasteners into at least two studs or use appropriately rated anchors, connect power, hang. Thirty to sixty minutes. Every cabinet we sell ships ready for either method.
Five mistakes that cost money
- Buying a 4–5 in deep cabinet for a 2x4 wall. Check the depth spec against 3.25 in before anything else.
- Cutting into the wall behind the vanity without checking for the vent stack. This is where it usually is.
- Measuring the cabinet instead of the rough opening. They are different numbers and the manufacturer publishes both.
- Cutting a stud on a load-bearing wall without a header.
- Buying a surface mount cabinet with unfinished sides and only noticing after it is on the wall.
Frequently asked questions
Are medicine cabinets in bathrooms outdated?
No, though they went through a period of being designed out. Through the 2010s many renovations replaced the medicine cabinet with a large plain mirror plus separate storage, largely because the cabinets themselves were unattractive — a shallow metal box with a bevelled mirror. What changed is the product, not the demand: a lighted cabinet with mirrored sides and a finished frame now looks like a mirror and stores like a cabinet. Search volume tells the same story — "medicine cabinet" and its close variants still draw tens of thousands of US searches a month.
Why do new homes not have medicine cabinets?
Builders often leave them out because recessing one adds framing work and coordination with plumbing and electrical, and because a surface-mounted mirror is cheaper to install at scale. It is a construction cost decision more than a design decision, which is why medicine cabinets are one of the most common post-purchase additions in a bathroom.
What do people do instead of medicine cabinets?
The usual substitutes are a plain wall mirror plus a vanity with drawers, open shelving, or a tall linen cabinet. Each works, but none recovers the storage that sits inside the wall cavity or immediately above the sink — which is why the cabinet keeps coming back in small bathrooms where floor area is the binding constraint.
Can a medicine cabinet be recessed?
Only if the wall allows it. You need a cavity deeper than the cabinet — about 3.25 in usable in a 2x4 wall — and no plumbing, wiring, ducting or vent stack in the way. On a load-bearing wall, cutting a stud requires a header. Where those conditions are not met, surface mount is the answer rather than a compromise.
What are the pros and cons of a recessed vs surface mount medicine cabinet?
Recessed sits nearly flush and projects about an inch into the room, but requires wall depth, cutting, and an empty cavity, and cannot be undone. Surface mount needs no wall work, installs in under an hour, works over tile and in rentals, and gives you the full cabinet depth as storage — but it projects 3–5 in and, on most cabinets, shows unfinished sides.
How do you surface mount a medicine cabinet?
Locate the studs, mark a level line, and fasten through the cabinet's back into at least two studs, using appropriately rated anchors where a stud is not available. Connect power if the cabinet is lighted. Thirty to sixty minutes for most installs, against most of a day for a recessed one.
How deep is a standard wall cavity for a recessed medicine cabinet?
About 3.25 in of usable depth in a 2x4 wall, and about 5.25 in in a 2x6 wall. Measure the wall thickness and subtract the drywall on both faces to confirm your own.
What is the standard medicine cabinet size?
Widths cluster at 16, 20, 24, 30 and 36 in; heights at 26–32 in, most commonly 30 in. Depth is 3.25 in for slim recessed units and 4–5.5 in for surface mount and lighted models.
Can a recessed medicine cabinet fit between studs?
Yes, if it is roughly 14 in wide or less — the clear space between studs at 16 in on-center is about 14.5 in. Anything wider requires cutting a stud and installing a header.
Should a medicine cabinet be the same width as the vanity?
Equal width or slightly narrower. A cabinet wider than the vanity below it looks like an error. For a 30 in vanity, a 24 or 30 in cabinet works; for a 48 in vanity, a 36 in cabinet or two narrower ones.
How high should a medicine cabinet be mounted?
Position the mirror centre near eye level for the household, which usually puts the cabinet's bottom edge 48–52 in above the floor. Over a vanity, leave 4–6 in of clearance above the countertop for the faucet.
Can you install a medicine cabinet on a tiled wall?
Surface mount, yes — drill through the tile with the correct bit into studs or anchors. Recessed means cutting the tile out, which is difficult to do cleanly and near-impossible to reverse.
Are there recessed medicine cabinets without a mirror?
Yes — a medicine cabinet recessed no mirror configuration exists, though it is a minority of the market. Most recessed units are mirrored because the cabinet has traditionally served as the bathroom mirror.
Are lighted medicine cabinets worth it?
They earn their place when the cabinet is doing a job a plain mirror cannot: lighting your face for grooming, or lighting the room. If the bathroom already has good vanity lighting on both sides of the mirror, a plain cabinet plus that lighting does the same work — or a separate LED bathroom mirror with storage elsewhere. If the vanity has a single overhead fixture — the most common arrangement — a lighted cabinet materially changes how the space works, because it moves light from above your head to beside your face.
Do lighted medicine cabinets need an electrician?
A hardwired cabinet generally does, and local code may require it. A cord-and-plug model can be connected to an existing GFCI outlet, but check that the outlet placement suits the cabinet's cord exit.
Wall cavity and stud spacing figures reflect standard North American residential framing; confirm your own construction before cutting. Cabinet dimensions and lumen figures given for Inyouths models are the published specifications for those products. Where a specification is still being verified with our factory, we have left it out of this guide rather than estimate it.
