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Plumbing installation cost guide

The plumbing in your property provides water and removes waste, and goes a long way to transforming your house into a home.

You may be looking for plumbing installation costs for a new bathroom, a renovation project or new build. The costs to install plumbing depend on a range of factors, such as the size of the job, the current condition of your property and the types of fixtures and fittings you have selected.

Average cost to plumb in a bathroom: £1675

In this plumbing installation cost guide, you’ll find information on the average cost to plumb a house, replace a bathroom and more.

These are average prices, and the actual costs you will pay will be affected by the size and condition of your property, its condition and size. The prices should be used for illustration purposes only.

The estimations were extensively researched by the Checkatrade team and confirmed by MRICS and MCIOB qualified Bob Branscombe at Branscombe Consulting – a tradesperson who holds an impressive 34 years experience in the industry.

Plumbing installation costs - under the sink plumbing

Plumbing installation costs Cost per-project
Average price
Plumbing in a bathroom£1675
Central heating installation£3750
Plumbing for a 2-bed house£13,000
Plumbing for a 3-bed property£15,000
Plumbing for a 4-bed property£17,000

*These are estimated, average costs. Our prices have been researched widely online by the Checkatrade team and represent a ballpark average for your proposed project. Costs may vary by region, the scope of the project and indeed by the products you plan to use.

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Factors affecting the cost of plumbing installation

Each job – and each property is different, but certain factors can affect all plumbing installation costs and quotes. The cost to install plumbing will be more in larger properties and for bigger jobs, but other variables that can affect plumbing pipe prices include:

  • Location – PluPlumbing installation costmbing installation costs will vary across the UK, with those in cities such as London paying more for new plumbing installations.
  • Age and condition of the property – If your property and its current plumbing are in poor condition, plumbing installation costs will be higher.
  • Ease of access – If plumbing within a property is difficult to access, costs will increase – including those to make good the affected area once work is completed.
  • Is drainage/waste pipework required? – Installing or replacing waste and drainage pipes can add to the total plumbing pipe costs.
  • Quality of new fixtures and fittings – The more expensive the fixtures and fittings you specify, the higher the cost to replace plumbing.

Plumbing pipe cost

Replacing a burst water pipe is a typical task for a plumber and should cost around £100 and take 2 hours.

Plumbing pipe costs are affected by how easy it is to isolate the water supply, to access the pipe and to complete the work. Emergency call out charges are typically more expensive.

Steel or copper pipes are fine, but if you choose more expensive varieties of pipe, then plumbing costs will increase.

Cost to plumb a bathroom

The average cost to plumb a bathroom is £1,675 and should take around a week to complete.

The job includes removing and replacing the toilet and cistern, bath and sink and replacing them all.

Your total bathroom replacement cost will depend on the size of the bathroom and the condition of the property. Older properties may require additional pipework to be completed, which can increase the price.

Cost to replace plumbing

Factors such as the age and condition of your property, location and access will all affect the size of your quotation. Your choice of pipework, fixtures and fittings will all influence costs, as will the choice of whether your tradesperson will remove all waste.

If you are moving the site of a bathroom, kitchen or heating system, the cost to replace plumbing will be higher.

Cost to plumb a house

Plumbing a house from scratch is a complicated and expensive job.

The average cost to install plumbing in a new home with 1 main bathroom and 1 en-suite:

  • 2-bed house = £13,000
  • 3-bed house = £15,000
  • 4-bed house = £17,000

The quote includes the labour to install new pipework throughout the property, connecting this to mains services (water, drainage and sewerage) where required.

Your choice of pipes, fixtures and fittings will have an impact on price, as will your location and the size and style of the property.

Cost to install a central heating system

Gas pipe installation cost

The average cost to install a central heating system in a new 2-bedroom house is around £4000, which includes replacing the boiler, all pipework and installing new radiators. The job should take between 2-3 days.

Central heating installation costs will vary according to the type of system you opt for, with gas the most popular.

The size of the property, including the number of bedrooms, and access for pipework will affect prices. So too will the type of piping.

A good rule of thumb is: the greater the number of radiators, the higher the price.

Replacing an existing central heating system will be higher than fitting one to an empty property. If you want to replace the current central heating system in your 4-bedroom home with an entirely new one, budget to spend around £10,000 to complete the work.

Additional plumbing installation costs to consider

The costs featured above are averages based on our research. They exclude additional costs which you may be required to pay, including:

  • Prep work – Any preparatory work that your plumber may need to do before starting will need to be factored into the cost, or completed before your chosen tradesperson arrives.
  • Waste disposal – If your tradesperson is required to remove of and dispose of waste, this will be added to the total plumbing installation cost.
  • Redecorating or finishing – The costs above only include new plumbing installations, but exclude finishing such as tiling or painting that may be required.
  • Concealed pipework – Hiding pipework is more expensive than leaving it exposed by surface mounting it. If you choose to conceal your pipework, expect to spend more.

Looking for a plumbing installation quote?

If you are searching for plumbing installation costs or quotes, you can get one from Checkatrade. We hold the UK’s largest database of trusted tradespeople who can transform your house into a home.

Key takeaways

  • The average cost to plumb a bathroom is £1675, to install a central heating system £3750-£4000 and to install completely new plumbing is between £13,000 – £17,000.
  • The total plumbing installation cost will be affected by a range of factors, such as the current condition of your property and its size.
  • The more expensive your choice of pipes, fixtures and fittings, the higher the job cost.
  • Factor in additional expenditure, including waste disposal and redecorating.
  • Problems with existing plumbing can occur when installing a new bathroom, central heating system or re-plumbing a house.
  • Clarify whether your tradesperson is quoting for the entire job, or is charging on an hourly basis.