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There are many reasons one might want to put an ensuite bathroom into the home.

They are great for expanding families, as they give a master bedroom a dedicated bathroom and take the pressure away from the larger, central family bathroom. They are also good for adding value to a home if you are looking to sell, especially if a family is looking to buy.

In bigger homes, ensuite bathrooms can be used as a method of creating an HMO (house of multiple occupancies) as they effectively create a single dwelling for a person without shared facilities. However, there are several factors you should consider when looking to install an ensuite facility in your house. It is important to remember that you shouldn’t need planning permission either, although Planning Portal does explain you may if you live in a listed building.

If you are satisfied you want an ensuite, then we suggest you consider these finer points of such a project before you start.

Ensuite Bathroom


The first aspect to consider must be the cost of such a project. An ensuite bathroom might not be hugely expensive, but there are hidden costs you must consider.

Remember, you will be building the walls and entrance too, so factor in the cost of a stud wall as well as the furniture you need. Much will depend on size too; are you hoping to include a bathtub, or looking for a smaller room with a shower enclosure? There is also the cost of additional plumbing to consider, as typically an ensuite is going into a room that is currently not served with water and waste extraction.

Real Homes set the average cost of such a project at £3,000, but there are many factors which can push this estimate up.


The size of your project may well be determined by cost, but there are other factors that will determine your decision. For instance, how big is the room you wish to put the facility in? It is likely to be tight on space and therefore not suitable for a room with a bathtub and other facilities. An ensuite can be small, but usually not smaller than 1.5m x 1.3m. Bear in mind, the usual size of a shower tray is 800mm square, which does guide you somewhat in terms of size. You can save space with a vanity basin and compact WC pan, but if you go too small the room will be uncomfortable to use.


Despite working with tight spaces, an ensuite done properly can be a real style statement. The main aspect to consider is light; it is most likely you will not have natural light in the room, so make sure you use artificial lighting well. You can add to the aesthetic by exploring exciting wall tiles and coverings, as well as coloured grout, as we explained in my article ‘Make Your Kitchen and Bathrooms Pop with Coloured Grout’. In terms of furniture, waterproof boards can make your shower enclosure feel contemporary and stylish, but it really is all about the light. Get that right and your small space will feel much more usable.


So, your walls are up, the water is connected, and you are straight out of bed and into your own private shower. Job done, right? Wrong.

Remember, you have added a whole new section to your plumbing system, with hot and cold water, waste going out and lots of new piping. It is vitally important that you ensure any post-installation problems are covered with a good insurance policy. The plumbing and drainage cover on HomeServe, outlines how you can also add other elements such as electrics, boiler and heating, for comprehensive protection across your ensuite renovation. Given that you will have additional lighting too, as well as extraction, it might be wise to explore a more comprehensive cover.

Installing an ensuite should not be an expensive nor time-consuming process, but it will only pay dividends if you have the need for an additional bathroom, or if there is an intention to add value in order to sell your home as suitable for a large family.

Your guide to adding an ensuite bathroom
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