Recessed Medicine Cabinets in Florida: In-Wall Framing.

Recessed vs Surface-Mount, First

A recessed medicine cabinet sits inside the wall cavity and projects only its door, often well under an inch, while a surface-mount cabinet bolts to the wall face and stands 4 to 6 in. proud. In a tight Florida bathroom — and most are tight — recessing is the move that reclaims walking space and keeps a swing door or an elbow from hitting the cabinet.

The trade-off is depth of storage versus depth of room. A recessed unit is limited by how deep the wall is, so its shelves are shallow; a surface-mount box can be as deep as you like, swallowing tall bottles and first-aid clutter. The reason to recess is almost always spatial, not capacity: you are buying back floor and clearance, not shelf volume.

When surface-mount is the smarter call

Surface-mount wins whenever cutting the wall is risky or impossible. A concrete-block wall, a wall packed with plumbing, or a rental where you cannot open up framing all point to a surface unit. It hangs over existing holes, dodges wires and pipes, and installs in an afternoon.

When recessing is worth the framing

Recessing earns its labor in a narrow bath where a protruding box would crowd the vanity or the door swing, and on an interior partition where the stud bay is clear. If you are already opening walls during a vanity installation or a full remodel, recessing a cabinet or a storage niche is a small add to work already underway.

How Deep Is the Wall for a Recess?

A standard interior framed wall is only as deep as its studs: a 2x4 wall gives about 3.5 in. of cavity, and a 2x6 wall about 5.5 in. Those are the actual stud dimensions, not the nominal names, and they set the hard ceiling on how deep a recessed cabinet body can be before it pokes out the back side of the wall.

Reading depth before you buy the cabinet

Manufacturers publish a rough-in depth — how far into the wall the cabinet body needs to go. Match it to the wall: a 3.5-in. body fits a 2x4 wall, while a deeper unit needs a 2x6 wall or a furred-out pocket. Buying first and measuring later is how a cabinet ends up too deep for the wall it was meant for.

2x4 wall

About 3.5 in. of clear cavity depth. Suits the majority of slim recessed medicine cabinets sold for residential bathrooms.

2x6 wall

About 5.5 in. of depth. Common on plumbing walls and some exterior framed walls — but those are exactly the walls you usually want to avoid.

Furred CMU wall

Depth equals the furring thickness you build out (a 1x3 strip gives roughly 2.5 in.); a shallow cabinet or a custom niche is the realistic option.

Picking the Right Wall

The right wall for a recessed cabinet is an interior, dry partition with no pipes and no main electrical runs, where the cabinet can drop into a stud bay. Avoiding the plumbing wall and the exterior wall sidesteps the two failures that turn a tidy upgrade into a leak or a structural fix.

The wet wall is off-limits

The wet wall carries the sink and shower supply lines, the drain, and the vent stack. Cutting a cabinet pocket into it crowds plumbing you cannot move easily and invites a hidden leak — a serious problem in Florida, where a slow leak inside a humid wall feeds mold rather than drying out. Keep the recess off the wall behind the faucet.

Watch for electrical in the bathroom wall

Bathroom walls also hide wiring. Code requires GFCI protection on bathroom receptacles under NEC 210.8(A), adopted into the Florida Building Code, and the cable feeding that outlet, the vanity light, and the fan often runs through the very bay you want to open. Scan the cutout zone with a non-contact voltage tester before any saw touches the wall.

The interior partition is the target

• Best: an interior, non-load-bearing partition with a clear stud bay and no services running through it.
• Acceptable with care: an interior bearing wall — workable, but a cut stud must be properly headed (covered below).
• Avoid: the wet wall, and any exterior CMU wall, which has no cavity at all.

Picking the wall is the decision that governs everything after it. Get it right and the framing is routine; get it wrong and you are chasing a pipe or a code violation mid-project.

Can You Recess a Cabinet in a Block Wall?

Not directly. A concrete-block (CMU) wall has no stud cavity to recess into — it is solid masonry — so a true recess requires either furring out a framed pocket in front of the block or, more often, choosing a surface-mount cabinet instead. This is the single biggest difference between Florida bathrooms and the stud-framed homes most online guides assume.

Why Florida exterior walls have no cavity

Across much of Florida, exterior walls are concrete masonry units — nominal 8x8x16 blocks meeting ASTM C90, laid on the slab and tied together with a poured concrete lintel at the top. The blocks are hollow, but the cells holding vertical rebar are grouted solid, and the wall is finished with furring and drywall or with stucco. There is no open, uniform bay behind that surface to slip a cabinet into.

Building a framed pocket on block

To recess on a block wall, the wall is furred out with vertical members — pressure-treated 1x3 strips or galvanized hat channel fastened with masonry screws or powder-actuated pins — creating a shallow framed space, then drywalled. The cabinet recesses into that built-out pocket, not the masonry. The same furring approach is detailed in our guide to drywall over CMU block, and depth is limited to whatever the furring provides.

The simpler answer on block

For most homeowners with a block exterior wall, the practical answer is a surface-mount cabinet anchored to the masonry, or a recess relocated to an interior partition. Forcing a recess into solid block is rarely worth the build-out unless the wall is being furred and finished anyway.

Framing the Opening Between Studs

You frame a recessed opening by sizing it to the stud bay and carrying any cut stud on a header. At 16 in. on center, the clear bay is about 14.5 in. (16 in. minus the 1.5-in. stud face), so a cabinet that fits within that width drops in with no cutting; a wider cabinet means cutting a stud and framing the hole with a header above and blocking below.

Why a header, not a notch

Code limits how much you can remove from a load-carrying stud. Under FBC and IRC R602.6, the allowances are narrow, and a cabinet opening blows past all of them:

• Notch, bearing or exterior stud: no deeper than 25% of the stud width.
• Notch, non-bearing partition: no deeper than 40% of a single stud width.
• Bored hole: no larger than 40% of the stud width — up to 60% only if the stud is doubled and no more than two in a row.

A cabinet opening is far bigger than any of those limits, so the right move is to cut the stud cleanly and transfer its load to a header — not to hack a slot into a stud that is holding up the wall.

King studs, header, and sill

The two full studs flanking the opening act as king studs; a header — commonly a doubled 2x member — spans between them across the top of the opening, and a sill of blocking closes the bottom. The cut stud terminates at the header and sill, so its share of the load is rerouted around the hole rather than dropped.

Backing for the cabinet

Blocking on all four sides also gives the cabinet something to screw to. A recessed unit fastens through its side flanges into the king studs and through top and bottom into the header and sill, which is why the framed box needs to be solid on every face, not just open.

Framed this way, the opening is structurally sound and ready for the cabinet — the header does the engineering, the blocking does the fastening, and nothing the wall was carrying gets compromised.

Installing It, Step by Step

Installing a recessed cabinet is a short sequence once the wall is chosen: locate and scan, open the drywall, frame the opening, set the box, then finish. The order matters because each step protects the one before it — you scan before you cut, and you frame before you trust the hole.

The structural work is concentrated in Step 3; everything else is layout and finish. A built-in or custom niche follows the same path, which is why built-in cabinet installation and a recessed medicine cabinet are really the same framing problem at different sizes.

The Florida Sign-Off

Before opening a wall for a recessed cabinet in Florida, confirm five things: the wall is interior and dry, it is framed rather than solid block, the bay clears any plumbing and wiring, the cabinet's rough-in depth fits the stud depth, and any cut stud will be headed. Each is a known failure point in a humid, slab-on-grade home.

The pre-cut checklist

• Wall type: an interior framed partition, not an exterior CMU wall with no cavity.
• Dry, not wet: clear of the supply, drain, and vent stack so no recess crowds plumbing.
• Electrical: the cutout zone scanned for the GFCI circuit, light, and fan wiring per NEC 210.8(A).
• Depth match: the cabinet rough-in depth fits the wall (about 3.5 in. on 2x4, 5.5 in. on 2x6).
• Structure: any cut stud carried by a header and blocking, never an oversized notch.

Clear all five and the recess is a clean, code-compliant upgrade that reclaims real space. Our crews frame and install recessed cabinets, vanities, and built-in storage to this standard across all 67 Florida counties — start with vanity installation or have us finish the drywall around the opening, and we will match the recess to your wall and your bathroom.