Rough-in plumbing is the first and most labour-intensive stage of any new bathroom, kitchen, or laundry installation. It happens before the walls are lined and tiles are laid — and it's also where the biggest cost surprises tend to occur. This guide explains what rough-in plumbing costs in Australia in 2026, what drives the price, and how to avoid bill shock.
What is rough-in plumbing?
Rough-in plumbing is the structural first-fix work: running water supply pipes and drain pipes through wall cavities, ceiling spaces, and subfloors before any lining or tiling. Think of it as the skeleton of your plumbing system — invisible once the job is finished, but everything hangs off it.
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Get a quote →It includes:
- Running cold and hot water supply lines to each fixture location
- Installing drain waste and vent (DWV) pipes
- Setting up stub-outs (pipe ends left in walls ready for fixtures)
- Pressure testing all connections before walls are closed
Rough-in plumbing costs by room
| Service | Low | Typical | High | Unit |
|---|---|---|---|---|
| Bathroom rough-in | $2,000 | $3,200 | $6,500 | total |
| Kitchen plumbing rough-in | $1,500 | $3,000 | $5,000 | total |
| Laundry renovation plumbing (rough-in + fit-off) | $1,500 | $2,800 | $5,000 | total |
| Bathroom fit-off (fixture connection, after tiling) | $1,000 | $2,000 | $3,000 | total |
| Toilet relocation (new drain position) | $800 | $2,000 | $4,000 | total |
Whole-job totals for each stage. Bathroom and kitchen figures are the rough-in stage only; the laundry figure covers rough-in and fit-off together. Fixtures are not included.
New rough-in vs. relocation — a critical cost difference
New installation (same position)
- Pipes extend from nearby existing lines
- Short pipe runs, minimal cutting
- Lower labour hours
- Standard rough-in pricing applies
Relocation (moving fixture position)
- Requires re-routing existing pipes
- Often involves cutting concrete slabs
- Significantly more labour and materials
- Relocating a toilet alone costs $800–$4,000
Moving a toilet from one wall to another, or relocating the shower to the opposite corner, isn't just twice the work — it often involves cutting the concrete slab to reroute drain lines. Relocating a toilet to a new drain position costs $800–$4,000 on its own, with slab homes at the upper end. If your renovation involves moving fixtures, get a specific quote for the relocation.
What's included — and what isn't
A rough-in plumbing quote should include:
- Labour for running pipes and setting stub-outs
- Basic pipe, fittings, and isolation valves
- Pressure testing and sign-off
It typically does not include:
- Concrete cutting or patching
- Wall patching or plastering after pipe runs
- Fit-off (second-stage fixture connection — quoted separately)
- Council permits (required in some states for drainage work)
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Check My Quote →Residential plumbing rough-in: new build vs renovation
For a home, rough-in plumbing is usually quoted as a total job rather than point by point. A bathroom rough-in costs $2,000–$6,500, typically around $3,200, and a kitchen plumbing rough-in costs $1,500–$5,000, typically around $3,000. A laundry's plumbing, rough-in and fit-off together, runs $1,500–$5,000.
New build
The frame is open and there are no existing fixtures to work around, so pipes can run directly to each new point. The quote mostly follows how many wet areas and fixtures you are plumbing.
Renovation
Keeping the toilet, shower and basin where they are keeps a renovation toward the lower end. Moving fixtures, especially on a concrete slab where drains have to be cut in, is what pushes a quote toward the top of the range.
Rough-in is only the first stage. Connecting the fixtures after tiling (fit-off) is quoted separately: $1,000–$3,000 for a bathroom. See plumbing fitting charges per point.
Rough-in plumbing costs by city
Plumbing prices vary by city. See current plumber rates for Sydney, Melbourne, Brisbane, Perth, Adelaide and Canberra.