Small Bathroom Renovation Cost in 2026: Real Numbers for 5x8 Baths

The first quote I ever saw for a 40 square foot bathroom was $14,000, and the homeowner's reaction was the same one I hear every week: how can a room the size of a parking space cost that much? The honest answer is that a small bathroom contains almost everything a big one does — a toilet, a tub, a vanity, waterproofing, wiring, venting — just packed tighter. In 2026, a small bathroom renovation runs $4,800 to $16,500, and the trades still show up the same number of days.

Small Bathroom Renovation Cost by Scope

• Cosmetic refresh (paint, vanity, mirror, fixtures, light): $2,800-$5,500
• Mid-range remodel (new floor tile, tub surround, vanity, toilet): $7,500-$12,000
• Full gut, same layout: $11,000-$16,500
• Full gut with layout changes or tub-to-shower conversion: $15,000-$24,000
• Powder room / half bath refresh: $2,400-$6,500

Why Small Bathrooms Cost More Per Square Foot

A 40 sq ft bath at $12,000 is $300 per square foot. A 100 sq ft primary bath at $28,000 is $280. The small room looks more expensive because fixed costs — permit, dumpster, plumber trip charges, waterproofing setup, one full day of demo — do not shrink with the room. Only tile quantity and paint do.

Roughly $4,000-$6,000 of any bathroom remodel is fixed cost that a smaller room cannot escape.

Line-Item Breakdown of a $9,800 5x8 Bathroom

• Demo and disposal: $850
• Plumbing rough-in and fixture set: $1,900
• Electrical, GFCI and exhaust fan: $700
• Floor tile and wall tile installed: $2,600
• Tub or shower base and surround: $1,400
• Vanity, top, faucet and mirror: $1,150
• Toilet, trim, paint and hardware: $800
• Permit and protection: $400

Where Small Bathrooms Blow the Budget

1. Moving the toilet or shower drain: $2,500-$5,000 because the slab or joist bay has to be opened.
2. Rotted subfloor found at demo: $600-$1,800.
3. Curbless shower in a small room: needs joist notching or a raised floor, $1,500-$3,500 extra.
4. Frameless glass on a tub: $1,200-$2,400, often more than the tub itself.
5. Mosaic or herringbone tile: labor jumps 25-45% over straight-lay.

How to Keep a Small Bathroom Renovation Under $8,000

Keep every drain where it is. Reglaze a sound cast-iron tub for $450-$700 instead of replacing it. Tile the floor and the tub surround only, and paint the rest. Buy a stock 30-inch vanity with a cultured marble top. Do your own demo and painting if you have the weekends. These five choices routinely move a $13,000 quote to about $7,500 without the finished room looking cheap.

Timeline for a Small Bathroom

Two to three weeks of calendar time for a gut, but only 9-12 working days of actual labor. The gaps are waterproofing cure time, inspection scheduling and vanity delivery. A cosmetic refresh is usually done in 4-6 days.

Frequently Asked Questions

How much does it cost to renovate a small bathroom in 2026?

$4,800 to $16,500 for a typical 5x8 bathroom. A cosmetic refresh lands near $3,500, a mid-range remodel around $9,800, and a full gut with a tiled shower reaches $15,000 or more.

Can you remodel a small bathroom for $5,000?

Yes, if the layout stays put. A $5,000 budget covers a new vanity, toilet, floor tile, light, paint, tub reglazing and new trim with a contractor doing the installs. It does not cover a new tiled shower or any plumbing relocation.

What is the average cost per square foot for a small bathroom?

$180-$420 per square foot in 2026. Small rooms sit at the high end because fixed costs like permits, demo and plumber trips are spread over fewer feet.

Is it cheaper to convert a tub to a shower in a small bathroom?

Not usually. A tub-to-shower conversion costs $3,800-$9,500 because it adds waterproofing, a new drain location and glass. Keeping the tub and retiling the surround is the cheaper path.

How long does a small bathroom renovation take?

Two to three weeks for a gut renovation and under a week for a cosmetic update. Ordering the vanity, tile and glass before demo day is the single best way to avoid dead time.