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.
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
| Room / Project | Points | Rough-In Cost |
|---|---|---|
| Standard bathroom (shower, basin, toilet) | 3–4 | $800–$1,800 |
| Ensuite (shower, vanity, toilet) | 3–4 | $750–$1,600 |
| Full bathroom (bath, shower, vanity, toilet) | 4–6 | $1,200–$2,500 |
| Kitchen | 2–3 | $600–$1,500 |
| Laundry | 2–3 | $400–$900 |
| Additional toilet | 1–2 | $400–$800 |
| Outdoor entertaining (sink + garden tap) | 2–3 | $600–$1,200 |
Labour only. Materials (pipe, fittings, valves) charged separately. Costs vary significantly based on access difficulty and distance from mains.
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 per-point pricing applies
Relocation (moving fixture position)
- Requires re-routing existing pipes
- Often involves cutting concrete slabs
- Significantly more labour and materials
- Can cost 2–3× a standard rough-in
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. Concrete cutting alone adds $300–$800 to a job. If your renovation involves moving fixtures, get a specific quote for the relocation, not just a per-point rate.
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)
Have a rough-in quote? Check it against current market rates.
Check My Quote →Rough-in plumbing costs by city
| City | Bathroom Rough-In | Per Point |
|---|---|---|
| Sydney | $1,100–$2,500 | $250–$400 |
| Melbourne | $1,000–$2,200 | $220–$380 |
| Brisbane | $900–$2,000 | $200–$350 |
| Perth | $900–$2,100 | $210–$360 |
| Adelaide | $800–$1,800 | $190–$330 |
| Canberra | $900–$2,100 | $210–$360 |
Frequently asked questions
How much does rough-in plumbing cost in Australia?
For a standard bathroom (3–4 points), rough-in plumbing costs $800–$1,800 in labour. Per-point rates run $180–$350 depending on city and complexity. Sydney and Melbourne are at the top end.
What is included in rough-in plumbing?
Rough-in covers running supply and drain pipes through walls and floors before lining and tiling — the first-fix structural plumbing. It does not include connecting fixtures (that's fit-off) or wall patching.
How long does rough-in plumbing take?
A standard 3–4 point bathroom rough-in typically takes 4–8 hours for an experienced plumber. Complex jobs with slab cutting, long pipe runs, or difficult access can take 1–2 full days.
Does rough-in plumbing cost more on a concrete slab?
Yes — typically 30–50% more, because rerouting drains in concrete requires cutting and patching the slab. Timber-framed floors allow pipes to run through the subfloor with much less disruption.
When does rough-in plumbing happen in a renovation?
Rough-in happens before wall lining (plasterboard) and tiling. In a renovation sequence: demolition → rough-in plumbing → rough-in electrical → waterproofing → tiling → fit-off plumbing → fixtures.
Do I need a permit for rough-in plumbing in Australia?
Yes, in most Australian states any drainage work requires a plumbing permit and council inspection. Your plumber should handle the permit application — if they don't mention it, ask. Permit costs range from $100–$400 depending on scope and state. In NSW, plumbing and drainage work requires a plumbing compliance certificate.
How long after rough-in plumbing can tiling start?
Typically 1–3 days after rough-in sign-off. The plumber must pressure-test all connections and a council inspection may be required before walls are lined. After lining comes waterproofing (24–48hr cure time), then tiling can start. Don't rush this sequence — skipping the inspection voids your plumbing compliance certificate.