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Primary Bathroom Remodel Cost

Primary bathrooms often combine more square footage with larger showers, double vanities, premium fixtures and extensive tile. Plumbing layout and waterproofing quality can have an outsized effect on the final bid.

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PROJECTCOSTWISE PLANNING EXAMPLE

120 sq ft primary bathroom remodel

$18,000–$36,000

Based on the estimator’s editable assumption of $150–$300 per sq ft before complexity adjustments. This is a planning example, not a contractor quote.

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How much does a primary bathroom remodel cost?

Quick answer: using the current ProjectCostWise starting assumption, a 120 sq ft primary bathroom at standard complexity produces an $18,000–$36,000 planning range. Shower design, tile coverage, plumbing changes and fixture quality can move the number. See how the calculation works.

What affects primary bathroom remodel cost?

  • Walk-in shower size and waterproofing system
  • Tile coverage, layout and material choice
  • Double vanity cabinetry and countertops
  • Freestanding tub or upgraded fixtures
  • Plumbing relocations and drain changes
  • Lighting, ventilation and electrical upgrades

Three scope levels

Lighter scope

Keeping the layout and focusing on fixtures, vanity, surfaces and lighting can control complexity.

Standard scope

A standard primary bath may include a rebuilt shower, new vanity, tile, fixtures, lighting and routine plumbing or electrical work.

Higher-complexity scope

Moving fixtures, enlarging showers, adding custom glass, extensive tile or luxury fixtures can push costs higher.

How to compare primary-bath bids

Compare waterproofing, shower system, tile allowance, plumbing scope, glass, fixtures, vanity, counters, ventilation and electrical work line by line. A low allowance for tile or fixtures can make an initial bid look cheaper than the finished project.

Price the layout decision separately

Start with a drawing of the current tub or shower, toilet, vanity, doors and windows. Decide whether fixtures remain in their existing positions. A finish replacement and a layout change should be quoted as separate scopes because moving drains, supply lines or walls may change the work more than the bathroom's area suggests. Ask for written fixture and tile allowances with quantities and installation assumptions, so a lower quote does not simply assume cheaper selections.

Bathroom bid comparison worksheet

  • Demolition: Is removal and disposal included, and how are hidden damage changes approved?
  • Wet area: Which waterproofing system, shower base and testing are included?
  • Ventilation: Is fan replacement or duct routing included?
  • Selections: List fixture models, tile areas, glass, lighting and vanity allowances.
  • Schedule: What happens if this is the household's only usable bathroom?

Record each bid's allowances and exclusions in the free comparison worksheet. The estimator provides a range for planning, not a fixed price or inspection of hidden plumbing and framing.

Questions to ask contractors

  • What waterproofing system is included?
  • Are tile, vanity and fixture allowances realistic?
  • Is shower glass included?
  • Are plumbing relocations included in the base price?
  • How will ventilation and moisture control be handled?
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Enter the bathroom area and complexity to create a free planning range before collecting contractor bids.

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Frequently asked questions

How much does a primary bathroom remodel cost?

ProjectCostWise currently uses an editable $150–$300 per-square-foot starting assumption before complexity adjustments.

Why does tile matter so much?

Tile affects both material cost and installation labor, especially in showers, niches, floors and complex layouts.

Does moving plumbing add cost?

Usually yes because drains, supplies and vents may need to be relocated.