How Much Does a New Sewer Connection Cost in Australia (2026)?
Quick Answer
New sewer connection costs $5,000–$20,000+ total. Council application: $1,000–$5,000. Plumbing and excavation: $3,000–$15,000. Inspection fees: $500–$1,000. Distance to sewer main is the biggest cost driver.
Sewer Connection Cost Breakdown
| Component | Cost Range |
|---|---|
| Council/water authority application fee | $1,000–$5,000 |
| Plumbing design (hydraulic consultant) | $500–$2,000 |
| Excavation (per metre) | $100–$300/m |
| Pipe supply and install | $2,000–$8,000 |
| Connection to main (live tapping) | $1,000–$3,000 |
| Inspection openings | $200–$500 each |
| Council inspection fees | $500–$1,000 |
| Road/footpath restoration | $2,000–$5,000+ |
What Affects the Cost?
- Distance to sewer main: The #1 cost driver. Every extra metre adds $100–$300
- Depth of main: Deeper mains require deeper trenches and more shoring
- Road crossings: If the main is across a road, add $3,000–$8,000 for road cutting and restoration
- Rock: If you hit rock during excavation, add 50–100% to excavation costs
- Council requirements: Some councils require CCTV inspection of the completed connection
Compliance Requirements
New sewer connections require council approval before work begins. You'll need a hydraulic design, Form 7 lodgement, and typically 2–3 council inspections during construction. Minimum pipe grades must comply with AS/NZS 3500.2.
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