8x10 Bathroom Layout: The Mid-Size Either/Or

The 8x10 fork: one upgrade, chosen deliberately

Below 80 square feet, layout is mostly dictated — a 5x8 has one arrangement, a 6x9 barely more. At 8x10 the room finally has slack, and slack means choices. The defining fact of the footprint is that it grants exactly one significant upgrade over a standard full bath: a double vanity, or a separate tub and shower. Trying to force both is where 8x10 remodels go wrong, ending with a cramped 32-inch shower nobody enjoys.

So the real work at this size is choosing the upgrade before drawing the plan. This article covers that choice and the three layouts that come out of it. For the broader map of what every footprint supports, see bathroom layouts by size; for the design principles that apply at any size — sight lines, door swings, weighing options — see choosing a bathroom layout, which owns that ground.

The clearance math at 80 square feet

Eighty square feet reads roomy until you lay in the fixed blocks. A 72-inch double vanity plus its 30-inch NKBA-recommended clear floor consumes a 6-foot wall and 2.5 feet of depth. A 60-inch tub is 5 feet of wall. A comfortable 42-to-48-inch shower is another 4 feet. Add them and you exceed one wall; the 8x10 works only because it has two 10-foot walls to distribute them across.

The governing numbers are the same everywhere: 15 inches from the toilet centerline to any neighbor and 21 inches of clear floor in front of fixtures under the IRC, with NKBA recommending 18 and 30 inches respectively for comfort. At 8x10 you can finally hit the NKBA numbers instead of the code floors — which is much of what makes the room feel like a step up.

• 72" double vanity + 30" clear floor: fills a 6-ft wall, leaves the rest for the toilet.
• 60" tub: 5 ft of wall; pairs naturally at the end of a run sharing the shower’s plumbing.
• 42–48" walk-in shower: 4 ft of wall — the comfortable size an 8x10 can actually give.
• Toilet: needs a 30-inch-wide zone (15" each side of centerline) wherever it lands.
• A fully partitioned water closet is possible but eats roughly 15 sq ft of the 80.

Three layouts that work — and one that fights back

Each row below is a genuine 8x10 plan, defined by which upgrade it takes. The last is the tempting trap.

The double-vanity question

An 8x10 is the first footprint where a real double vanity is comfortable rather than crammed. A 60-inch cabinet fits two sinks at a minimum; 72 inches gives each person genuine counter and elbow room, with the two bowls spaced far enough apart to use at once. On a 10-foot wall, either leaves space for a linen tower or a run of drawers at one end.

The honest counterpoint: a double vanity is a lifestyle upgrade, not a resale requirement, and it costs you the second bathing fixture at this size. If only one or two people use the bathroom, the counter space of a single 48-to-60-inch vanity plus a separate tub may serve better. The decision is about your household’s morning, not a spec sheet.

Separate tub and shower: the math and the trade

Wanting a dedicated soaking tub and a separate walk-in shower is the other classic 8x10 ambition, and it fits — cleanly — when you give up the double vanity. The efficient version lines the tub and shower along one 10-foot wall as a single wet run: they share a plumbing wall, the drains sit close together, and the opposite wall carries a single vanity and the toilet.

For the finer decision between a combo and truly separate fixtures — cost, cleaning, resale, and who each suits — see tub-shower combo vs. separate tub and shower, which owns that comparison. The layout takeaway is narrower: at 8x10, "separate" is affordable in space but spends your one upgrade, so it is the right call for households that genuinely both soak and shower.

A curbless or low-threshold shower is easier to build into this footprint than to retrofit later, and it future-proofs the room for aging in place without reading as institutional. If accessibility is on the horizon, the clearance targets shift — the bathroom ADA dimensions reference has the full set.

Wet-wall economics: where the budget really goes

Two 8x10 bathrooms with identical fixtures can differ by thousands purely on plumbing arrangement. Every fixture that stays on an existing wet wall reuses supply, drain, and vent runs; every fixture that migrates to a fresh wall adds framing, pipe, and sometimes floor work. The layouts above deliberately cluster plumbing on one or two walls for exactly this reason.

The practical rule at this size: choose the arrangement that keeps the toilet and at least the bathing fixtures near existing drains, and spend the savings on what you touch daily — the vanity, the shower glass, the tile. Relocating a fixture to marginally improve a plan you will stop noticing in a month is the most common way mid-size budgets overrun. When a move genuinely fixes function, it is worth it; the guide to choosing a bathroom layout covers how to tell the difference.