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Adding a new bathroom to a property can be an excellent investment. Having multiple bathrooms is a great way to make a property more attractive to potential buyers and it can also carry several practical advantages, especially in a crowded household. En-suite bathrooms in particular prevent long queues in the morning while also making larger bedrooms that much more luxurious.

That being said, before you go out and buy a bathroom suite it is important to know exactly what costs are involved in fitting an en-suite bathroom. As well as your standard sink, bath/shower and toilet, you will also need to factor in the cost of the decorating, making alterations to pipework, installing essentials like an extractor fan and building a partition wall to create the en-suite in the first place.

Before you get with your project, be sure to collect several quotes from local bathroom fitters. Depending on whether you are installing an entirely new en-suite bathroom or simply replacing an old one, you may also need the help of a builder for partition wall construction, as well as a plumber to make the necessary alterations to your existing plumbing.
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What are the costs for fitting an en-suite bathroom?

There are dozens of pages out there with ‘average’ costs of fitting en-suite bathrooms, but the choice is that you will only have a good idea of the potential costs once you have specific details of the bathroom that you want to build. 

The first thing to consider is what you would like the bathroom to include. Most en-suites contain the bare essentials: a toilet, sink and bath/shower. The cost of installing these units is easy to predict:

  • Toilet - £70 to £150
  • Pedestal sink basin - £70 to £120
  • Shower - £100 to £200
  • Bath - £120 to £240
  • Extractor fan - £140 to £250

These prices cover the costs of removing and installing the new units. Obviously for luxurious options such as power showers you should expect to pay more. It can also be worth considering underfloor heating, though installing this in an existing property can be extremely expensive.

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The second thing to take into account is the cost of decorating your en-suite. Bathroom tiling is an ever popular choice, as tiles are both decorative and water resistant. It is also worth mentioning that most of the costs of a typical tiling job are for labour rather than materials; if your en-suite is particularly small, you could find the cost of tiling it will be lower than you would have thought. As a general estimate, you should expect to pay around £15 to £25 per square meter for tiling. Alternatively, you could always choose a simple paint job, the cost of which will again depend on the size of your room.

Thirdly, You will also need to factor in the cost of making alterations to your utilities. While simple like-for-like replacements of bathroom features are relatively cheap, installing an entirely new bathroom will require you to change your property’s plumbing work to accommodate it. Naturally, this work should only be handled by a qualified local plumber.

While the cost of making alterations can be high, there are ways to save money. The easiest method is to simply be careful about where you place your bathroom. If it is adjacent to, above or below an existing bathroom, fewer alterations will be necessary and the costs will be lower.

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It is also worth thinking about your heating system. More specifically, you will need to find out whether your boiler has high enough water flow and water pressure to be able to support another bathroom. If not, you may need to consider buying a new boiler.

Fourthly, you will need to factor in the costs building the walls of your en-suite. Most en-suites take their space from an existing room, typically a bedroom, using partition stud walls with waterproof plasterboard. When choosing how much room to allocate to your new en-suite, keep in mind that the walls may need to be built with a cavity space to store pipework and other unsightly utilities.

Finally, you will need to consider the cost of installing good quality lighting in your en-suite. The reason we mention this is that you will need to make sure that lighting used is sufficiently waterproof. Simple check a light’s IP rating to find out if it is appropriate; the higher the rating, the more water resistant the light will be.

The overall cost of fitting an en-suite bathroom can vary widely depending on each of the elements involved. As a very general estimate, you could expect to pay at least around £3,000, assuming that you are having an entirely new bathroom installed rather than a like-for-like replacement.

If you want to get a fair and competitive price for installing your en-suite bathroom installation, try to collect at least three quotes. A bathroom fitter should be able to give you a full quote for the project, though depending on their skill set they may also need to bring in a plumber or electrician to complete the work safely.