Small Bathroom Remodel Cost: The 5×8 Budget (2026)

CostMyProject Research Team Prices checked October 2026

The 5×8 hall bathroom — 40 square feet, tub on one end, toilet and sink along the wall — is the most common bathroom in America. Remodeling one costs $3,000 for a refresh and $12,000–$25,000 for a full mid-range job. Here's the exact budget, the layouts that work, and the space tricks that make 40 sq ft feel like 60.

5×8 bathroom remodel cost (2026)

Notice the per-square-foot numbers look shocking next to kitchens ($150–$400/sq ft). That's the small-bathroom paradox: a toilet, a tub, and a vanity cost the same whether the room is 40 or 120 sq ft, so all the fixed fixture cost lands on fewer square feet. Judge a 5×8 by the total, not the per-foot rate. All figures are October 2026 US planning estimates (±25%).

Line-by-line 5×8 budget: mid-range full remodel

Planning range (±25%): $10,000–$16,600. The same 40 sq ft as a refresh — paint, new faucet and showerhead, mirror, lighting, hardware, toilet seat — runs about $4,500 and takes a long weekend plus a plumber's half-day. Punch your own choices into the bathroom remodel cost calculator.

The layout: don't fight the 5×8

Sixty years of builders converged on one layout for a reason: the tub spans one 5-foot end wall, the toilet and vanity sit along one long wall sharing a wet wall, and the door swings in at the opposite end. Plumbing stacks vertically and horizontally with minimal runs, which is why this layout is also the cheapest to remodel — every fixture stays where the pipes already are.

The tempting alternatives all cost more than they gain. Swapping the toilet and vanity sides saves nothing and reroutes the drain ($4,000+). A corner shower "to gain space" actually loses the tub — and in a home's only full bath, losing the tub narrows your buyer pool. The one layout change sometimes worth it: replacing a swing door with a pocket door ($500–$1,000), which reclaims the 7 sq ft of door swing — nearly 20% of the room's usable floor.

Space-saving fixtures worth the money

• Wall-hung or floating vanity. Showing floor under the vanity visually doubles the floor area. A 24–30" floating vanity ($600–$1,200) is the single best square-foot illusion in the room.
• Round-front vs. elongated toilet. An elongated bowl is 2" longer — in a 5×8, those 2" are the difference between comfortable and cramped in front of the vanity. Measure twice.
• Recessed medicine cabinet. A surface-mount cabinet juts 4–5" into the room; recessing it between studs ($150–$300 extra during a gut) keeps the wall plane clean and adds real storage.
• Clear glass tub door. A shower curtain visually cuts the room in half; clear glass ($400–$900) lets the eye travel the full 8 feet. In a 5×8, sightlines are square footage.
• 48" vanity top, single sink. Don't try to fit a double — a wide single with generous counter space on both sides serves two people in shifts better than two cramped sinks serve them together.
• Tall narrow storage. A 12"-deep linen tower ($300–$700) holds more than a wide vanity ever will and fits the dead corner by the door.

Tile strategy for small baths

Tile is where small bathrooms are won or lost visually. The rules: large format (12×24 or bigger — fewer grout lines = calmer walls), light colors (white, warm gray, pale blue), matching grout (contrast grout chops the wall into a grid; matching grout lets it read as one surface), and one accent maximum (a niche in a patterned tile, or the floor — not both). Run floor tile up one wall and the room reads taller; run the same tile on floor and walls and the boundaries dissolve entirely.

Budget reality: porcelain at $14/sq ft installed is the sweet spot — it convincingly mimics marble and needs zero sealing. Natural stone ($22+/sq ft) in a steamy 40-sq-ft room is a maintenance commitment: annual sealing, etch-prone, and every water spot shows. Save the stone budget for the master. One more tile trick for tight budgets: use the expensive tile only inside the tub surround (the wall everyone sees) and a matching large-format porcelain on the floor and remaining walls — you get the designer look at roughly half the tile-setting cost, because the setter isn't cutting intricate patterns across the whole room.

Lighting: the cheapest renovation in the room

A 5×8 with one builder-grade bar light over the mirror looks like a cell; the same room with layered lighting looks designed. The formula: sconces at eye level on both sides of the mirror ($150–$400/pair installed — side light flatters faces, overhead light doesn't), a bright ceiling light on a dimmer, and if there's a shower, a recessed can over it ($200–$350). Total lighting budget $600–$1,200 — and it's the highest satisfaction-per-dollar line in the whole remodel. Put the vanity lights on a dimmer; harsh 5000K at 6am is a design failure, not a feature.

What not to do in a 5×8

• Don't remove the tub (in the only full bath). Walk-in showers are lovely in masters; in a hall bath they shrink the buyer pool to childless households.
• Don't use dark tile everywhere. One dark accent wall is drama; four dark walls in 40 sq ft is a cave.
• Don't install a vessel sink. It eats 6" of counter height and splashes; an undermount keeps the sightline clean and the counter usable.
• Don't skip the exhaust fan. 40 sq ft steams up in 90 seconds. A humidity-sensing fan ($200–$400) vented outside — not into the attic — is the cheapest mold insurance ever sold.
• Don't tile yourself into a corner — literally. Plan the layout from the doorway sightline: the prettiest wall (usually the tub surround) faces the door, cuts hide behind the toilet.

5×8 refresh for under $5,000: the exact play

If the tub, tile, and layout are sound, here's the refresh that reads as a remodel: reglaze the tub ($400–$600), new single-handle faucet and showerhead ($250–$450), new mirror — go big, 24×36 minimum ($150–$300), paint in a light warm white ($100–$200 DIY), new vanity light + sconces ($200–$400), new toilet seat and hardware ($100–$200), luxury vinyl plank over the old floor if it's flat ($400–$700), and fresh caulk everywhere ($30 DIY, $200 pro). Total: roughly $2,500–$4,500, one long weekend, and the before/after photos look like $15,000.