Bathroom remodel costs explained
Small room, big price per square foot
Bathrooms are usually the smallest rooms in a home, yet they carry one of the highest renovation costs per square foot. The reason is concentration: in a few square metres you find water supply, drainage, ventilation, waterproofing, electrical work near water, tile on floors and walls, and fixtures that must be set precisely. Each of those tasks needs skilled labor, and many need inspections. A powder room refresh might cost a few thousand dollars, while a fully gutted primary bathroom with a walk-in shower can easily reach five figures.
This calculator multiplies your floor area by a cost per unit area that matches your finish level, then adjusts it for local prices. If a contractor has already given you a rate, or you want to test a figure you read elsewhere, pick “Custom amount” and type it in.
What each finish level includes
A budget remodel typically keeps the existing layout and replaces the vanity, toilet, faucet, lighting and mirror, perhaps with a new prefabricated tub surround or a fresh coat of moisture-resistant paint. A mid-range project adds ceramic or porcelain tile, a new tub or tiled shower, better ventilation and quality fixtures. High-end bathrooms feature natural stone, frameless glass, heated floors, double vanities, custom storage and often a curbless shower that requires reworking the subfloor.
The cost drivers you can control
Moving plumbing is the biggest single decision. Relocating a toilet means re-routing a large drain line, which may involve cutting joists or a concrete slab. Keeping fixtures in place can save thousands. Tile is the second big lever: large-format porcelain is fast to install, while small mosaics and intricate patterns multiply labor hours. Shower glass, niches and benches all look great but add cost quickly.
Waterproofing is the one place you should never economise. A properly installed membrane behind and under tile prevents the leaks and mould that turn a bathroom remodel into a structural repair. Ask every contractor how they waterproof and what warranty they offer.
Planning tips for a smoother project
If this is your only bathroom, plan for a temporary alternative before demolition starts. Order the vanity, fixtures and tile in advance so the work is not held up waiting for deliveries. Use our tile calculator to check quantities, including waste for cuts, and the renovation budget calculator to add a 10 to 20 percent contingency — older homes often hide damaged subfloors behind toilets and tubs.
The figures here are typical estimates, not quotes. Prices vary by region, season and the condition of your home, so always get several written quotes and confirm the scope in detail before you sign.
How it's calculated
Bathroom remodels are expensive per square foot because of plumbing, waterproofing and tile labor. We multiply floor area by a typical cost per square foot (or square meter) for your finish level and adjust for local prices.
Worked example
A 50 sq ft (4.6 m²) mid-range bathroom in an average area: 50 × $275 = $13,750, of which about $5,500 is labor.
Frequently asked questions
+How much does a small bathroom remodel cost?
A small 40–50 sq ft (4–5 m²) bathroom typically costs $8,000–$15,000 for a mid-range remodel.
+Why is bathroom labor so expensive?
Several trades are involved — plumbers, electricians and tilers — and waterproofing must be done right.
+Can I save by keeping the layout?
Yes. Moving the toilet or shower drain can add thousands. Keeping the layout is the single biggest saving.
+How long does a bathroom remodel take?
Usually 2–4 weeks for a full remodel, depending on tile work and fixture delivery.
+Can I use my own cost per square foot?
Yes. Pick "Custom amount" under finish level and type the rate your contractor quoted, or the one you found locally.
