How Much Does Plumbing Repiping Cost in Australia? Full 2025-2026 Price Guide

If your home has old galvanised steel or deteriorating copper pipes, you have probably noticed rusty water, low pressure, or pinhole leaks that keep coming back. A full plumbing repiping replaces every supply pipe in the house with new material, fixing these problems permanently rather than patching them one joint at a time. The average plumbing repiping cost in Australia sits between $8,000 and $20,000 for a standard three-bedroom home, but the final figure depends on your pipe material choice, the number of water points, and how accessible your existing pipes are. With over 11,000 licensed plumbers listed on TradieVerify, you can compare qualified professionals in your area before committing to a quote. This guide breaks down every cost factor so you can budget with confidence.

Plumbing Repiping Cost: The Short Answer

The total cost to repipe a house in Australia varies based on the scope of work and the material you choose. Here is how three common project sizes compare.

A partial repipe makes sense when a single pipe run has failed but the rest of the system is sound. A full repipe is the better long-term investment when your pipes are past their expected lifespan or you are seeing problems in multiple areas of the house.

Cost Per Water Point

Many plumbers quote repiping jobs on a per-point basis rather than a flat rate. A water point is any fixture connection: each tap, toilet, shower, dishwasher inlet, or washing machine valve counts as one point.

A typical three-bedroom home has 15 to 25 water points. At $150 to $350 per point, the supply pipe work alone comes to $2,250 to $8,750 before you add the manifold, mains connection, and make-good costs.

Per-point pricing works in your favour because it gives you a clear line-item breakdown. You can see exactly what each fixture connection costs and compare quotes on a like-for-like basis. Ask every plumber you quote to itemise by water point.

Copper vs PEX: Material Cost Comparison

The two most common materials for repiping in Australia are copper and PEX (cross-linked polyethylene). Each has trade-offs in cost, longevity, and installation time.

PEX saves 30 to 50 per cent on a full repipe compared to copper, mainly because it is faster to install. A plumber can run PEX through walls with fewer joints, and crimp connections take seconds compared to the minutes required for soldering each copper joint. For a standard three-bedroom home, choosing PEX over copper can save $3,000 to $6,000 on the total job.

Copper still has its place. Some homeowners prefer copper for exposed pipe runs because it looks cleaner and resists UV. Copper is also the standard choice for gas lines (PEX cannot be used for gas) and for the first 300mm of pipe coming off the hot water unit where temperatures may exceed PEX ratings.

Your licensed plumber will recommend the right material based on your water quality, local regulations, and whether pipes will be exposed or concealed.

What Affects the Total Repiping Cost?

Beyond the pipe material and number of water points, several factors can push your repiping cost higher or lower.

Access and construction type. Pipes buried in a concrete slab cost more to replace than pipes running through accessible wall cavities or a subfloor. Slab homes may require the plumber to run new pipes through the ceiling or external walls to avoid cutting into concrete, adding $2,000 to $5,000 to the job.

Number of storeys. Multi-storey homes need longer pipe runs and may require scaffolding or ceiling access from the floor above. Expect a 20 to 30 per cent premium on labour for two-storey homes.

Hot water system location. If your hot water unit is far from the bathrooms, the pipe runs are longer and cost more. Some homeowners choose to relocate the hot water unit during a repipe to reduce pipe lengths and improve delivery times. Relocation adds $500 to $2,000.

Make-good and repairs. The plumber needs to cut into walls, ceilings, and sometimes floors to access old pipes. Patching plasterboard, repainting, and replacing tiles afterwards can add $1,000 to $3,000 depending on how much was opened up. Some plumbing companies include basic make-good in their quote; others leave it for a plasterer or builder.

Permits and inspections. Most states require a compliance certificate for repiping work. Your plumber handles this, but the inspection fee ($100 to $500) may be listed separately on the quote. All plumbing work in Australia must comply with the Plumbing Code of Australia (PCA) and be carried out by a licensed plumber.

Asbestos. Homes built before 1990 may have asbestos cement pipes for drainage or asbestos-containing materials in walls where pipes are routed. If asbestos is found, licensed asbestos removal is required before the plumber can proceed, adding $1,500 to $5,000 depending on the amount and type.

Signs Your Home Needs Repiping

Not every plumbing problem means you need a full repipe. Here is how to tell when targeted repairs are enough versus when a complete replacement makes more financial sense.

Repipe the whole house when:

• Your pipes are galvanised steel and over 40 years old
• You are getting brown or rusty water from multiple taps
• Pinhole leaks keep appearing in different sections of pipe
• Water pressure has dropped across the whole house despite no mains supply issue
• You are renovating extensively and walls are already open

Targeted repair is enough when:

• A single joint or section has failed but surrounding pipes are in good condition
• The problem is limited to one fixture or one room
• Your pipes are copper or PEX and less than 30 years old
• A plumber has inspected and confirmed the rest of the system is sound

A licensed plumber can perform a pressure test and visual inspection to help you decide. Some plumbers use CCTV cameras to inspect pipes internally, which costs $200 to $500 but can save you thousands by confirming whether a full repipe is needed.

Pipe Relining vs Full Repiping

Pipe relining is an alternative to full replacement for drainage and sewer pipes. A flexible liner coated in resin is inserted into the existing pipe and cured in place, creating a new pipe within the old one.

Relining does not work for water supply lines because the liners are not rated for drinking water pressure in Australia. If your supply pipes need replacing, repiping is the only option. For drainage issues, relining can save 30 per cent compared to digging up and replacing the drain.

State-by-State Licensing and Regulations

All repiping work in Australia must be carried out by a licensed plumber. Licensing requirements and regulators vary by state.

Every state requires plumbing work to be inspected and signed off. Your plumber should lodge the necessary compliance paperwork with your state regulator. If they do not mention compliance certificates, ask specifically. Unlicensed plumbing work can void your home insurance and create legal liability when you sell.

For a detailed breakdown of what each licence covers, read our plumbing licences guide.

How to Get the Best Price on a Repipe

Getting a fair price starts with getting comparable quotes. Here is how to make sure you are comparing apples with apples.

Get at least three quotes. The standard in Australia is three written quotes for any job over $1,000. Each plumber should inspect the property in person before quoting. Phone quotes for repiping are unreliable because access conditions vary so much between homes.

Ask for itemised quotes. A good quote breaks down costs into materials, labour, make-good, permit fees, and any allowances for unforeseen work. Per-point pricing makes it easy to compare. Avoid lump-sum quotes that do not explain what is included.

Check the material specification. Confirm whether the quote is for copper, PEX, or a mix. A quote using PEX should be cheaper than copper. If a cheaper quote uses copper, the plumber may be using thinner gauge pipe or fewer fittings.

Ask about make-good. Some plumbers include wall and ceiling patching in their price. Others do the plumbing and leave the make-good for you to arrange. Clarify this before you compare totals.

Verify the licence. Every plumber quoting should hold a current licence for your state. You can check licence status on TradieVerify or directly with your state regulator. Read our guide on how to hire a licensed plumber for the full checklist.

Time it with other renovations. If you are already renovating a bathroom or kitchen, repiping while the walls are open saves on make-good costs. Many homeowners combine a repipe with a bathroom or kitchen renovation to reduce the total spend.

Frequently Asked Questions

How long does it take to repipe a house in Australia?

A full repipe of a standard three-bedroom home takes three to five days. Smaller homes or partial repipes can be done in one to two days. Multi-storey or slab homes may take up to seven days if ceiling or external routing is required. You will be without water during active plumbing work each day, but a good plumber will restore supply by the end of each working day.

Can I stay in my home during repiping?

Yes, most homeowners stay in the house during a repipe. The plumber will shut off water during working hours and reconnect it at the end of each day. Expect dust from cutting into walls and some noise. If you have young children or work from home, the first two days are the most disruptive.

Is PEX legal for plumbing in Australia?

PEX is fully approved for water supply lines in Australia under AS/NZS 2492. It has been used in Australian homes since the 1990s and is now the most common material for new residential plumbing. PEX cannot be used for gas lines or in locations exposed to direct sunlight without UV-resistant sleeving.

Does repiping add value to my home?

A full repipe removes a major risk factor for buyers and building inspectors. While it does not add value in the same way a new kitchen does, it prevents price reductions that occur when a building inspection reveals old galvanised or failing pipework. Homes with recently repiped plumbing sell with fewer conditions attached.

Should I repipe with copper or PEX?

For most Australian homes, PEX is the better value choice. It costs 30 to 50 per cent less than copper, installs faster, and resists corrosion better in areas with aggressive water. Choose copper if you need exposed pipe runs, want the longest possible lifespan, or your local water authority recommends it for your water chemistry.

What is the difference between repiping and plumbing rough-in?

Plumbing rough-in is the initial pipe installation in a new build before walls are closed up. Repiping is the replacement of existing pipes in an established home. Rough-in is part of new construction; repiping is a renovation. The costs are similar ($8,000 to $15,000 for a standard home) but the work is different because repiping involves removing old pipes and dealing with existing wall and floor finishes.

Summary

• A full plumbing repiping in Australia costs $8,000 to $20,000 for a standard three-bedroom home
• PEX is 30 to 50 per cent cheaper than copper and suits most concealed pipe runs
• Per-point pricing ($150 to $350 per water point) gives you the clearest cost breakdown
• Partial repipes for a single bathroom or kitchen run $1,500 to $5,000
• Always get three itemised quotes from licensed plumbers
• All repiping must be done by a licensed plumber and inspected for compliance
• Combine repiping with renovations to save on make-good costs

Ready to get quotes? Search for licensed plumbers in your area on TradieVerify and compare professionals before you commit.

Sources

1. Plumbing Code of Australia - Australian Building Codes Board
2. How Much Does It Cost to Replumb a House? - ServiceTasker
3. How Much Does Pipe Replacement Cost? - Fix N Flow Plumbing
4. QBCC Plumbing Licensing - Queensland Building and Construction Commission
5. VBA Plumber Registration - Victorian Building Authority
6. NSW Fair Trading Plumbing - NSW Government
7. AS/NZS 2492 Cross-linked Polyethylene (PEX) Piping Systems - Standards Australia
8. Plumbing Costs in Australia 2026 - AS Estimation