How Much Does Bathroom Renovation Plumbing Cost in Australia (2026)?
Quick Answer
Bathroom renovation plumbing costs $3,000–$12,000+ total. Rough-in (first fix): $2,000–$5,000. Fit-off (second fix): $1,500–$4,000. Relocating fixtures adds $500–$2,000 per fixture.
Bathroom Plumbing Costs Breakdown
| Phase | Cost Range | What's Included |
|---|---|---|
| Strip-out (remove old) | $500–$1,500 | Disconnect and remove all fixtures, cap pipes |
| Rough-in (first fix) | $2,000–$5,000 | New pipe runs, waste positions, water points |
| Fit-off (second fix) | $1,500–$4,000 | Install all fixtures, connect, test, commission |
| Hot water (TMV install) | $200–$400 | Required for bath/shower per AS 3500.4 |
Per-Fixture Costs (Supply + Install)
| Fixture | Labour Only | Relocation Extra |
|---|---|---|
| Toilet | $300–$600 | +$500–$1,500 |
| Vanity basin | $250–$500 | +$400–$1,000 |
| Shower (screen not included) | $400–$800 | +$500–$1,500 |
| Freestanding bath | $500–$1,000 | +$800–$2,000 |
| Floor waste | $150–$300 | +$300–$600 |
How to Quote Bathroom Renovations
- Always quote in stages: Strip-out, rough-in, and fit-off as separate line items — this protects you if the project scope changes
- Site inspection is essential: Never quote a bathroom reno from photos alone. You need to see what's behind the walls
- Allow for unknowns: Add 10–15% contingency for hidden issues (asbestos, rotten framing, non-compliant existing work)
- Coordinate with other trades: Tiler, electrician, waterproofer — your rough-in must be done before waterproofing
Compliance Requirements
Bathroom renovation plumbing is notifiable work in QLD. You'll need to lodge a Form 7 covering all new/altered plumbing. Key compliance points: TMV on bath/shower (AS 3500.4), floor waste gradient (1:80 minimum), and correct trap seal depths (25mm minimum).
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