What does bathroom plumbing work cost in County Londonderry?
Our guide range in County Londonderry is £550–£3,500 including VAT. Prices in County Londonderry run at about 12% below the UK guide, based on Northern Ireland labour rates.
Like-for-like
- Isolation valves, new tails
Partial re-route
- Waste re-routed
New layout
- WC moved on the soil stack
Guide prices for County Londonderry including VAT. Your itemised written quote after the free survey is the price that counts.
Which towns do we cover in County Londonderry?
Most of County Londonderry 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. In Derry flats, any change to the WC or wastes is planned with the lease and the flat below in mind.
What the job includes
- Basin, bath and shower wastes sized and laid to a steady fall, with traps that hold their water seal
- Draining down and isolating supplies, with the rest of the house back on water as soon as possible
- Isolation valves on every fitting, so taps, cisterns and valves can be serviced without draining the system
- 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
- A pressure test of new pipework before walls are closed in and floors go down
Decisions to make first
Pipe routes
Drilling through the middle of joists, rather than notching the tops, keeps the floor strong. Routes are planned with the joist direction in mind.
Copper or plastic
Copper is rigid and suits pipes on show or near the boiler. Plastic is quicker under floors and inside walls, and long runs need fewer joints.
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.
Concealed or exposed valves
Concealed shower valves look neater but need an access route for servicing. Exposed bar valves are easier to reach and replace.
Rules that apply in Northern Ireland
New WCs, taps, showers and valves must meet the water fittings rules where you live: a maximum 6-litre flush for new WCs, backflow protection, and no pump connected directly to the mains supply, because shower pumps are only for gravity systems with a cold tank. Unvented hot-water cylinders must be installed by a G3-qualified installer, and any work on a gas boiler by a Gas Safe registered engineer.
In Northern Ireland, the Water Supply (Water Fittings) Regulations (Northern Ireland) 2009 apply to new fittings. New drainage and connections are a matter for building control.