Planning a Bathroom Renovation in Dural or Pennant Hills? Here Is What Plumbing Actually Costs

Step 1: Planning & Design — Get This Right First

• Set a realistic budget: For a standard bathroom renovation in Dural or Pennant Hills, most homeowners spend between $5,000 and $30,000 depending on size, fixtures, and complexity. Plumbing typically makes up 20–30% of that total.
• Decide on the layout: If you can keep your fixtures (toilet, shower, vanity) in the same positions, plumbing costs drop significantly. Moving fixtures means rerouting pipes — which adds time, labour, and cost.
• Know your council requirements: Some renovations in Dural and Pennant Hills require a development application or building approval. Your plumber and builder can advise on this, but it is worth checking early so it does not delay the project.

Step 2: The Plumbing Work — What Actually Happens Behind the Walls

• Waterproofing: This is critical and non-negotiable. The wet area behind tiles and around the shower and bath must be waterproofed before anything else goes on. In Sydney's climate, skipping or cutting corners on waterproofing leads to leaks, mould, and expensive damage within a few years. A good plumber will insist on this.
• Drainage: New or upgraded drainage is needed for the shower, bath, and vanity. The plumber ensures everything drains properly and meets the building code.
• Hot water connections: If you are adding or moving a shower or bath, the hot water supply needs to be connected or rerouted. This may also mean upgrading your hot water system if the current one cannot handle the demand.
• Shower and vanity plumbing: All water supply lines, waste pipes, and connections for your new fixtures are installed by a licensed plumber. This includes the shower head, taps, vanity basin, and toilet if it is being replaced.

Step 3: Materials & Fixtures — What to Choose

• Tiles: Porcelain and ceramic are the most popular choices for Dural and Pennant Hills bathrooms. Large-format tiles (600mm x 600mm or bigger) are trending in 2026 and reduce the amount of grout — which means less maintenance.
• Vanity: Wall-hung vanities are popular in smaller bathrooms because they make the room feel bigger. Freestanding vanities work better in larger spaces. Make sure the vanity depth suits your rough-in measurement — your plumber can confirm this.
• Shower: Frameless glass screens are the standard choice now. They open the space up and are easier to clean than framed options. For the shower itself, consider a rain shower head — they are more expensive upfront but make a big difference to the experience.

How Much Does Plumbing Actually Cost in a Bathroom Renovation?

• Basic plumbing (keeping fixtures in place, new connections only): $3,000–$8,000
• Mid-range (moving one or two fixtures, full replumb of wet area): $8,000–$15,000
• Full replumb with new shower, vanity, and bath — complex layout: $15,000–$25,000+

Common Mistakes That Blow Out Your Budget

• Skipping waterproofing or using cheap materials: This is the number one mistake. It looks fine for a year or two, then the leaks start. Fixing waterproofing damage after tiles are laid costs far more than doing it properly the first time.
• Choosing fixtures before consulting the plumber: If the vanity you love does not match your rough-in measurement, or the shower you want requires a different water pressure setup, you end up changing plans mid-build — which costs money.
• Not budgeting for the unexpected: Older homes in Dural and Pennant Hills sometimes have surprises behind the walls — corroded pipes, incorrect sizing, or non-standard connections. Set aside 10–15% of your budget as a contingency.
• Rushing the planning: A bathroom renovation done properly takes 2–4 weeks from start to finish. If you rush the design decisions, you end up making changes during the build — and changes during the build are expensive.

How To Choose The Right Plumber For Your Renovation

• Licensed and insured: This is a must. Any plumber working on your renovation must hold a current licence and public liability insurance.
• Experience with bathroom renovations specifically: General plumbing and renovation plumbing are different skills. Ask for examples of previous bathroom renovation jobs they have completed.
• Transparent pricing: A good renovation plumber will give you a detailed quote before work starts — not a vague estimate. If they will not put it in writing, walk away.
• Willing to work with your builder or designer: Bathroom renovations involve tilers, electricians, and builders as well as plumbers. Your plumber needs to coordinate with the rest of the team.