Planning A Bathroom Renovation?
Planning a Bathroom Renovation? Here's What Your Plumber Needs to Know
A bathroom renovation is one of the most impactful home improvements you can make — but it's also one of the easiest to get wrong if the plumbing side isn't planned properly. Involving your plumber before demolition starts can save significant time, money, and frustration.
Involve Your Plumber Before the Builder
The most common — and costly — bathroom renovation mistake is leaving the plumber until the end. Plumbing decisions affect the entire layout. Where fixtures can be located depends on existing pipe runs, floor joist positions, and drain fall. If you're planning to move a toilet, relocate a shower, or add a second basin, these decisions need to be made and costed before a single tile is ordered. Your plumber should ideally be involved at the design stage.
Understand What Can and Can't Be Moved
Some things are relatively easy to relocate — tapware, shower heads, towel rails. Others are more complex. Moving a toilet requires extending or modifying the sewer connection, which must maintain correct fall (gradient) to the main drain. Moving a shower waste across a concrete slab involves significant work. Your plumber can quickly tell you what's feasible within your budget and what will require a much larger investment.
Check Your Hot Water Capacity
Adding a large shower, a bath, or a second bathroom puts additional demand on your hot water system. If your existing system is undersized or aging, a renovation is the perfect time to upgrade. Adding a larger shower head or a bath to a system that's already borderline will result in lukewarm water at peak times — plan ahead and size correctly.
Consider Pipe Condition Before Tiling
Once tiles go on, accessing pipes becomes very expensive. Before the bathroom is closed up, ask your plumber to inspect the condition of existing water supply and drain pipes. In older Blue Mountains homes — many of which are 40–80 years old — galvanised steel pipes, lead fittings, and earthenware drains are common. The cost of replacing aging pipes during a renovation is a fraction of what it would cost to re-tile the bathroom later to access them.
Waterproofing and Compliance
All wet area plumbing work in NSW must comply with the Plumbing Code of Australia and be carried out by a licensed plumber. Waterproofing in wet areas must be installed correctly and in the right sequence — before tiling. If your renovation requires a development application or building approval, plumbing work will be inspected. Using an unlicensed tradesperson for plumbing in a renovation can void your home insurance and cause serious issues when you sell.
Get a Quote Before You Start
Ask your plumber to quote the full scope of plumbing work before the renovation begins — rough-in, fit-off, hot water, and any pipe modifications. Having a clear figure allows you to budget accurately and avoids the frustrating situation of being mid-renovation and discovering unexpected plumbing costs. A good plumber will provide a detailed fixed-price quote and won't have hidden charges.
Planning a Bathroom Renovation in the Blue Mountains?
Get your plumber involved early. We offer free renovation quotes and will work around your builder's schedule.
