- Postcode districts
- PL25
- Nearby
- Bodmin, Truro and Newquay
- Guide price
- £600–£4,100
- Typical time on site
- 1–5 working days
- Water
- Soft across most of Cornwall
- Survey
- Free, at your home
What does bathroom plumbing work cost in St Austell?
Our guide price for bathroom plumbing work in St Austell is £600–£4,100 including VAT. The figure depends on the size of the room, whether anything moves, and the products you pick.
Like-for-like
- New suite in the same positions
Partial re-route
- New hot and cold runs
New layout
- Pump or pressure upgrade
Guide prices for St Austell including VAT. Your itemised written quote after the free survey is the price that counts.
Working in St Austell
As well as St Austell itself (PL25), we survey in Bodmin, Truro and Newquay.
St Austell gets the same process as anywhere else: a free survey at your home and a written, itemised quote. If your St Austell water is hard, a scale reducer or softener on the bathroom supplies can protect valves and shower heads. For St Austell homes on a combi boiler, we measure the flow rate at the bathroom before you choose a shower valve.
Most of Cornwall is supplied with soft water. In soft water, taps, wastes and toilet pans scale up slowly, so brushed and matt finishes are a safe choice. Hardness varies street by street, so check the figure for your postcode with your water supplier.
What the job includes
- New hot and cold pipework in copper or plastic, properly clipped, and insulated where it runs through cold spaces
- The WC connected to the soil stack, or a new branch where the WC is moving
- A check of your hot water system, and the pressure and flow rate at the bathroom
- Isolation valves on every fitting, so taps, cisterns and valves can be serviced without draining the system
Decisions to make first
Gravity or pumped waste
Gravity drainage is always the first choice. A shower waste pump or macerator solves a run that cannot fall, but adds noise, a power supply and servicing.
Shower supply
Combi boilers and unvented cylinders give mains pressure. A gravity system with a cold tank may need a pump, but a pump must never be connected to the mains.
Rules that apply in England
In England, the Water Supply (Water Fittings) Regulations 1999 apply. New drainage or a new connection to the soil stack can be building regulations work under Part H, and a macerator or pumped WC is acceptable only where there is also a WC on gravity drainage elsewhere in the home.

