How Hard is it to Expand My Half Bath to a Full?

Lots More Information

More Great Links


“Adding a New Bathroom.” Do It Yourself. “Four Tricks to Adding a New Bathroom to Your Home.” PRWeb. (June 14, 2013.) “How to Plan the Perfect Half Bath.” This Old House.,,20202296,00.html

Does a shower count as a full bath?

A full bathroom is made up of four parts: a sink, a shower, a bathtub, and a toilet. Anything less than that, and you can’t officially consider it a full bath. … Therefore, a bathroom with a sink, toilet, and shower is considered a three-quarter bath. A bathroom with just a sink and a toilet is a half-bath.Sep 13, 2017


Can you add a shower to a half bathroom?

A half-bath, to put it simply, is a bathroom that comprises of a toilet and a sink—nothing more, nothing less. In other words, it’s a two-piece bathroom. If a bathroom has a shower or a bathtub, then you can’t call it a half-bath. And yes, you can definitely add a shower to a half bath.

Additional Costs to Consider:

Ventilation Requirements 

Every home has ventilation requirements to ensure that your home is properly ventilated to ensure good health. Current codes require either an operable window or an exhaust vent for every bathroom to circulate the air properly.

The national average to install a bathroom fan is anywhere between $300-400, which involves installing new fans and the ducts that run through to the exterior. 

Electrical Requirements

Electrical outlets will need to be installed on a GCFI circuit or ground fault circuit interrupter which provides additional protection against shock in wet areas. These outlets will be standard in modern homes but might be missing in older homes, so it is important to ensure you have a GCFI circuit available.

The average cost to install an electrical outlet r

The average cost to install an electrical outlet ranges anywhere between $130-300 depending on the complexity of the job, the location of house and any special features that are asked for. Keep in mind that much of the cost of installing an outlet will be labor costs. It is recommended that you hire a skilled and experienced electrician to ensure the job is completed safely. 

Quality of Materials

The last factor to consider would be the quality of materials. Depending on the types of material you want for your bathroom, the greater the expense will be.

To that end, you want to ensure that the materials you choose will be in your budget. Try to strike a balance between luxury and affordability when choosing the materials for your bathroom. 


Photo by Linda Oyama Bryan

Obviously, a half bath needs running water as well as drainage and ventilation. For budget reasons, try to locate your new half bath as close to existing water and sewer connections as possible. One of the cheapest options is to place it where it can share a wall with an existing bathroom.

For older houses built on piers or over basements, new plumbing lines can be placed below the main floor fairly easily. Houses built on slab foundations, though, will require some jackhammering and patching of the slab to connect existing plumbing lines to the new space, which adds to the project’s cost.

Where possible, fixtures, including sinks, should be hooked to existing plumbing lines. The good news is because powder rooms are used less frequently, you can choose more delicate (and often more visually appealing) fixtures.

Shown: Here a Waterworks vessel sink is filled by a wall-mounted brushed nickel faucet.

What are the Benefits of adding a Half Bathroom?

Installing a half bathroom in your home will ultimately increase the value of your home. On average, installing a half bath will add 10% to your home’s value.

This bathroom also provides a convenient and easy to access bathroom for guests and family members. Since it is a half bath, it is much easier to clean and maintain than a larger bathroom as there is only a toilet and a sink. 

Choosing Materials and Components for the Remodel

Because the costs to add a shower to a half bath can creep up easily, choosing materials and components wisely is important. As you work with your contractor to generate a quote, be aware of which bathroom items are within your budget vs. those that will cause your budget to soar.

  tend to be the most budget-friendly, practical,

Figure out your biggest priorities for the bathroom remodel before requesting a quote from your contractor. For instance, is the shower the area where you want to invest the most? Ask your contractor how to cut costs on tiles, sinks, or the toilet.

Sound Insulation

Photo by Austin Patterson Disston

Adequate sound insulation is a key concern for any bathroom, but it’s especially important for half baths near living or dining areas where you may be entertaining guests. This can be accomplished inexpensively by adding sound insulation in a shared wall or by wrapping water pipes, vents, and drains with a sound-absorptive material before closing up the walls.

Shown: Located on a staircase landing between two floors, this bath is an architectural centerpiece but also demonstrates why sound protection is important when living areas are nearby.

What Does it Cost to Add a Shower to a Half Bath?

Half bathrooms are great for space savings and are generally affordable to renovate. But what if you truly want or need a shower in that half bathroom? There are plenty of benefits to adding a shower to a half bath that already exists in your home.

Half Bath to Full Bath Conversion Adding a shower or tub to a half bath provides more room for family or guests and boosts home value Increases home value by 10-20% Adds functionality for family or guests Usually does not require an addition Average Cost to renovate: $3,000 – $25,000

Not only is having an extra full bathroom useful, it also adds value to your home. Estimates vary, but homeowners can see an increase of 10 to 20 percent on the total value of the home. To put this into perspective, a $200,000 home can be put on the market for $220,000 to $240,000 or more after converting a half bath to a full bath. Home value gains will vary by the type of renovation completed and your local area.

Keep in mind, however, that converting a half bath to a full bath will cost more than simply remodeling a half bath as-is. Depending on the scope of the project and what bathroom materials and items you choose, it can range from $3,000 to $25,000. Another thing to take into consideration is that with the increase in home value determined by a property appraiser, the project may lead to your property taxes rising the next year.

Bathroom Remodel Cost Calculator

Take Me There

A professional bathroom contractor should be able to guide you on how to complete the project under budget and in a way that will yield you the biggest return on investment.

Plumbing Essentials 

Although the plumbing a bathroom requires can vary according to the kind of full bath you want to create, the basic plumbing requirements for most bathrooms include: a vented 2-inch drain line, one hot and one cold water supply pipe, a faucet valve for the tub, and a riser pipe for the shower. You’ll also need to hire a professional plumber to install the new pipes, valves, and drains. It is important to use a licensed plumber to complete this type of work to ensure that it is up to code and that all safety regulations are followed. 

How To Save Money On Adding A Half Bathroom?

As you can see, adding a new bath is not cheap at all. If you’re not careful it can take your bank balance to a poor state. That’s why you’d need to think of ways to reduce the extra cost. But the question is where can I reduce my cost?

Here we’ve gathered some tips for reducing the overall cost of adding a half-bath.


You can reduce a lot of the extra cost if you’ve a DIY mindset. Start with doing the demolition on your own. Clear out the area where you plan to build your bathroom. Don’t wait to pay the labor fee for this. You can do this yourself. 

But make sure you aren’t hurting your home’s structure. Otherwise, it may bring more trouble than ease.

Paint On Your Own

Painting is the easiest and fun job out there. You only need to be a little cautious. Otherwise, the job is super easy. Spending money on hiring a painter is not necessary if you’ve a tight budget. 

Simply take a pair of gloves, your paint, and a paint roller. Now, paint all the walls yourself and show your creativity. Even if you make a few mistakes it can be forgiven.

Tile The Floor/Wall On Your Own

Tiling the bathroom floor or wall isn’t as hard as it seems. All you need is some little guidance for it. You can take suggestions from a professional or someone who’s done it before. 

With a little practice, you can even master this art. Tiling by yourself will save you a lot of money.

So, how is your budget plan going? Hopefully, now you’ve got an idea of the factors you need to count on.

Adding a Bathroom is Easier than You Think

Consider the Cost

One of the biggest hurdles to adding another bathroom is the cost. So many people don’t even consider it because they’re sure that it’s going to be far out of reach. However, it might not be as prohibitively expensive as you think.

Being apprehensive is understandable, but a small build-out doesn’t have to cost an arm and a leg. There are some smart tricks to adding the extra plumbing and installation work that will allow the benefit of an additional bathroom to outweigh the costs.

Factors that Affect Price

The upfront investment could cost a few thousand dollars if you already have the room to do it. If you need to add to your home, it could run into tens of thousands of dollars. It’s all about how much of a bathroom you want and what kind of space you currently have.

A large and luxurious bathroom is going to cost more than a small one, of course. But what many people don’t think of is the cost of taxes. If property taxes are already a pain in the neck, adding to the value of your home could end up making that annual tax bill climb upward.

Location, Location, Location

Your first major hurdle might come in finding the right space for your bathroom. However, you can add a half-bathroom with just a 15-20 square foot area of space. With 25 square feet or more, you could consider adding a small shower if need be.

So long as there are sufficient outlets, enough ventilation, and some insulation, you can find a way to add a bathroom. Think carefully and you might be able to turn even an underused closet into an extra bathroom.

Transform Unused Space

If your hallway goes to the end of your home, you could have the perfect spot for your new bathroom. Those hallways with no rooms on either side and just a window are excellent spots.

Even a large master bedroom might have some extra space for a bathroom. Partition a little bit of space that you don’t use, and you could give yourself enough space to add an extra sink and toilet for getting ready for bed.

You may even want to consider subdividing existing bathrooms. In homes with one huge bathroom, perhaps the space could be cut in half to make room for a second one.

Be Smart About Plumbing

Plumbing is the biggest hurdle for anyone adding a new bathroom. You need to plan carefully, so you spend as little as possible and avoid making your home more complicated than it needs to be.

Have an idea of what you want the bathroom to look like before you begin. Look at photos on Pinterest, in magazines, and on websites to see what it could look like.

Placement of Fixtures

Before you commit to an idea, design your layout and place your fixtures carefully. If you can put pipes close enough to existing plumbing, you could save a lot on construction costs and even on plumbing bills later on. Your waste and water lines can be a pain to extend, so make sure you do your best only to extend them short distances.

Bathroom Access

Think about your door too. Your entrance needs to get around any changes you make and allow you to make the most of the space you have. Sliding doors are an economical way to get the space that you need without having a door swing out and add a larger footprint for your bathroom.

A Bathroom Addition Can Be a Quick Process

While you should expect the construction to take some time, especially if you’re doing it yourself, it doesn’t take forever. A comprehensive renovation can take upwards of five weeks, but a smaller and less extensive job can take just a few weeks.

If you’re adding to the footprint of your home, it will take longer than it would if you’re adding the bathroom to extra space. That’s all the more reason to make the most of your space with a bathroom.

Post navigation

How Much Does It Cost To Remodel A 10×10 Ki

How Much Does It Cost To Remodel A 10×10 Kitchen: The Ultimate Guide

How to Clean Grout Between Marble Tiles: 3 Easy Methods


Leave a Comment