How Much Does It Cost To Add A Bathroom?

Adding an extension to an existing home can be a very worthwhile project in the long run, but it often requires a very significant amount of time, effort, and money, which can make it very daunting. 

However, sometimes adding an extra room to your home might be totally essential, especially if that room is a bathroom.

how much does it cost to add a bathroom?

There are few rooms as essential in a home as the bathroom, so you are probably here because you are looking to get started on building your new bathroom, but you aren’t sure how much it is going to cost you.

If you want to plan your new bathroom well ahead of starting, then you have come to the right place, because we have put together this comprehensive guide to finding out the price of your new bathroom, so you can ensure you are within budget, and that your bathroom ends up exactly as you expect it. 

Read on to get started now! 

What Would It Cost To Add A Bathroom To Your Home?

Unfortunately, we cannot say definitively how much it will cost to add a bathroom to your home, because the cost can actually fluctuate massively from project to project.

When you think about it, no two bathrooms are ever the same, and they can differ in terms of size, shape, materials, and the number of features found within them.

Data has shown that the average cost of adding a bathroom can range from anywhere between $7,000 to $12,500, depending on a number of factors.

If you consider the factors that will go into creating your new bathroom, and how it might look once finished, then you will be able to get a greater sense of how much you will spend, so you can plan accordingly. Let’s look at these factors now.

Is The Bathroom Brand New?

When we ask this, we mean whether the bathroom will be added to an existing space, such as when installing an en-suite, or whether you will be adding another room to the house.

If you are planning to install your bathroom in an existing floor space, then the project will cost much less.

If you need to build a totally new floor space for your bathroom, then it will cost more. The price for adding a whole new floor space to your home can see the cost ranging from $14,000 to $30,000, depending on its ultimate size!


As we touched on just above, the size of your new bathroom will have a direct impact on its building costs. A bigger project, such as a master bathroom, will cost more, with prices potentially rising as high as $100,000.

A smaller project, such as an en-suite, will cost less, as there is less space to fill. This could cost as low as $5,000.


When taking on any construction project for your home, we strongly advise you to make the most of professional builders who can help you to install the space perfectly.

Make sure to shop around for options when choosing contractors, to find a fair price. Some may charge a flat rate, while others may have personalized rates! 

how much does it cost to add a bathroom?


Materials are one of the most important factors to consider in your project. Higher-quality materials will cost much more than lower-quality materials, and you are going to need to consider how much of each material you require. 

The cost of these materials will also be affected by the individual prices that certain sellers decide on, so be sure to look around for a good price! 


No bathroom would be complete without its fixtures, and these are some of the most important factors to consider when you are building a bathroom. Your fixtures can vary massively in terms of design and function, and thus in terms of the overall price. 

For instance, a toilet that is installed directly into the wall may cost around $1,000, whereas a two-piece toilet may cost closer to $300 (see also “How Much Does It Cost To Knock Down A Wall“). 

The larger the bathroom space, the more fixtures you will likely be installing, such as baths, showers, and maybe even a bidet. Be sure to consider what your budget is, the space you are working with, and the overall aesthetic you want from your bathroom.


Materials that help to finish off the aesthetic of your bathroom should also be considered. These are important because you will want to balance cost and appearance.

If you are looking for a certain design in your bathroom, then you will want to make sure you have the budget for it. 

For example, stone tiles are much more expensive than ceramic tiles. Stone tiles will also require more maintenance which will ramp up long-term costs even after your bathroom has been fully installed.

The cost of painting your bathroom will also need to be taken into account, You can either paint the space individually or hire professional painters to take the task on for you.

Regardless, you will want to carefully consider the costs. Hiring painters will incur labor costs while painting yourself will require you to buy paint! 


Probably the most important thing to consider is the plumbing. Unlike some other spaces that might be added to a home, a bathroom will need to be adequately hooked up to plumbing in order to work.

Not all building contractors will be able to handle plumbing work, so you may need to consider paying extra for a plumber to come and hook up the new space. This can cost anywhere between $6,500 to $16,000.

We recommend not sparing any expense when it comes to plumbing so that you can save yourself from nightmarish maintenance fees down the line! 

To Finish Up

There you have it!

The cost of any given bathroom project can vary massively from case to case, so you must make sure to carefully plan your budget, and consider every factor that will go into building it, so that you can be sure your bathroom will look just as you imagined!

Luke Powell
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