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Bathroom addition

Q4 2026 price ranges for each option and job size, the labor and material split and how the estimate breaks down, for remodeling contractors bidding this work.

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What it runs

Q4 2026 pricing. National figures are the median of 50 metro areas. Ranges are rounded to the nearest $50, or $100 from $5,000 up.

  • Average

    $28,000 to $58,800

    30 to 100 square feet

  • Premium

    $49,200 to $89,800

    30 to 100 square feet

What the average option covers

Build a 1 story addition over crawlspace to accommodate a new bathroom, including window and wood siding. Solid surface countertop vanity with integral sink and quality faucets. Fiberglass tub and shower with ceramic tile surround and nice fixtures. Low profile toilet, general recessed lighting coverage and decorative sconce fixtures, mirrored medicine cabinet, linen cabinet. Ceramic tile flooring. Standard level of finish.

Labor and materials

For average, 50 square feet, nationally.

Labor 45%Materials 55%

How the estimate is structured

The cost categories an estimate for this work breaks into:

  • Project preparation
  • General demolition
  • Excavation
  • Concrete
  • Floor framing
  • Wall framing
  • Roof framing
  • Roofing and gutters
  • Wood windows
  • Exterior trim
  • Siding and awnings
  • Bathroom plumbing
  • Heating, ventilation, air conditioning
  • Electrical
  • Insulation
  • Wall coverings
  • Ceiling coverings
  • Interior doors
  • Interior trim, stairs and accessories
  • Cabinets and countertops
  • Floor covering
  • Exterior painting
  • Interior painting and wallpaper
  • Project finalization

By location

Average, 50 square feet, in each metro area.

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