Spring is in the air, and with it comes the irresistible urge to refresh and renew our homes. For many, a brand-new bathroom is at the top of the wish list. You’re dreaming of stylish tiles, a walk-in shower, and that freestanding bath you saw on Pinterest.
But before you fall in love with a design, there’s a critical first step that most homeowners overlook: understanding the plumbing you already have. The hidden network of pipes behind your walls and under your floor will be the single biggest factor determining what is possible, how long it will take, and how much it will cost.
At Plumbers 365, we believe a successful renovation starts long before the first tile is smashed. It starts with a professional plumbing survey. Let’s explain why this is the most important investment you’ll make in your project.
Absolutely. According to plumbing specialists at Plumbers 365, trying to design a new bathroom without understanding the existing plumbing is like trying to build a house without surveying the land. A pre-renovation survey moves your project from the realm of “I hope this works” to “I know this works.” It provides a clear, technical roadmap, preventing costly surprises and last-minute design changes down the line.
When you call Plumbers 365, our specialists check the water pressure (flow rate), the boiler capacity, and the soil pipe location. This tells you if that “High-Flow” shower you want will actually work, or if it will just be a disappointing dribble.
Consider a professional plumbing survey as a thorough health check of your entire system. Plumbers 365 plumbing experts usually assess:
Plumbers 365 experts suggest a checklist to ensure a smooth survey.
Technically, according to plumbing experts at Plumbers 365, your current plumbing is the “rule book” for your design. The biggest limitation is always the soil stack. This large-diameter pipe carries waste from your toilet to the underground drains. As often seen by plumbing specialists at Plumbers 365, moving a toilet even a few feet requires extensive new pipework that must maintain a consistent downward slope (a “fall”). This can dictate the entire layout of the room. Similarly, the position of existing water feeds and waste pipes will make it much cheaper and easier to keep sinks and showers in their current locations.
But that is not all, you also have to consider “gravity” as the main limiter since waste water must flow downhill at a specific gradient (1:40), limiting how far you can move wet items from the soil stack.
You can move it but should be prepared for it to be the most complex and expensive part of any bathroom move according to plumbing experts at Plumbers 365. As mentioned, the new position must be able to connect to the soil stack with a large 110mm pipe, maintaining a steady fall. This may involve:
A plumbing survey will tell you exactly what your options are.
Plumbers 365 plumbing engineers often come across bathroom renovations which warrant shower pumps, larger hot water cylinders, and isolation valves as standard upgrades. Our plumbing engineers advise that if you are upgrading from a standard bath to a luxury walk-in shower, your water demand doubles.
To be honest you should ideally consult a plumber as soon as you have a basic idea of what you want. Don’t wait until you’ve bought the suite and tiles. A consultation 3-6 months before your planned start date is ideal according to plumbing experts at Plumbers 365. This gives you time to:
According to plumbing specialists at Plumbers 365, your bathroom might look fine on the surface but more often than not, rotting floorboards from slow leaks and dangerous lead pipework are the most common surprises. Our experts have seen that a survey uncovers the expensive problems before they become mid-project disasters. Plumbing specialists at Plumbers 365 frequently find:
Plumbers 365 emergency plumbing specialists consider that if your home is more than 20 years old, almost certainly yes. The walls and floors are open, making it the most cost-effective and logical time to do it. Tiling over old, corroded pipes is a huge false economy. The small additional cost of replacing them now is nothing compared to the cost of ripping up your brand-new bathroom in five years to fix a leak.
As often seen by plumbing experts at Plumbers 365, old pipes can suffer from “pinholing” (corrosion). If you lay expensive marble tiles over old pipes and one bursts 6 months later, you have to rip the new floor up. Replace the supply feeds with modern plastic or new copper for peace of mind.
In simple terms, Cosmetic is swapping “like-for-like” (toilet in same spot) while Structural involves moving walls, wastes, or strengthening floors for heavy stone baths. Plumbers 365 plumbing experts lay down the basic difference as follows:
To be very honest, this is a huge variable, but for a full structural renovation, the “first-fix” and “second-fix” plumbing (labour and basic materials, not including the suite or fancy brassware) can account for 20-30% of your total renovation budget. If you are simply swapping like-for-like in a cosmetic renovation, the labour costs will be significantly lower. Moving fixtures is what dramatically increases the plumbing budget.
Your beautiful new bathroom deserves to function as perfectly as it looks. Investing in a pre-renovation plumbing survey is the smartest money you’ll spend on your entire project. It gives you clarity, a realistic budget, and peace of mind.
Partner with the experts from the very start. Plumbers 365 offers:
Planning a spring renovation? Don’t pick up a tile until you’ve talked to us. Call Plumbers 365 today or visit us at to book your survey.
