How to Determine the Cost to Build a Bathroom

A bathroom remodel is one of the most important projects for homeowners. With so many options available for this type of remodel, the cost to build a bathroom can vary greatly; here’s how to estimate your cost. 

Remodeling is an easy way to achieve luxury in a home.

In the case of a bathroom addition, it’s also a way to create peace and avoid traffic jams in a home where there always seems to be a line for the shower.

If you’re considering a bathroom remodeling project, there are a number of factors that will help you determine what your budget should be.

Why Is Determining the Cost to Build a Bathroom Difficult?

Keep in mind: this project involves more components than some other contracting jobs.

In addition to adding onto a floor plan, there are also plumbing issues and fixtures that accompany the project.

Although it does not use as much floor space as a kitchen, bathroom remodels do share some similarities in how complex they can be.

Determining Your Goals

The cost to build a bathroom depends greatly on your personal needs and wants.

If you will be adding new floor space to your existing home for the bathroom, you’ll need to check with your local authorities.

Permit costs and other paperwork to make your project legal will be part of your budget.

Another valuable investment is in obtaining an inspection from a qualified professional inspector before you start any work.

They will be able to identify potential problems in advance, and advise if your remodeling ideas are actually feasible.

For example, a homeowner may need to reinforce the foundation, if the addition will involve heavy materials like tile floors, granite, and large bathroom fixtures.

What Are Your Goals?

Be broad-minded about what your remodeling goals are at the beginning.

  • — First, identify what the most critical needs are.

Do you need a full bathroom, to help accommodate a growing family or changing lifestyle, or will smaller half-bath plan, with just a sink a toilet, suffice?

If building a master bath that adds more square footage, along with following features, your budget will be much different.

  • — Extended counter space
  • — Oversized spa tub
  • — A sauna
  • — A seating area

Determine your must-have and your hoped-for items, and you’ll have both a sound basic plan for your project, as well as possible improvements that can be made once you’ve met with your contractor and worked out the details.

Flooring Options Determine Cost to Build a Bathroom | Skyline Construction and Remodeling

Materials Make a Difference

You’ll discover that there is a nearly infinite range of materials to choose from in your bathroom addition, and it’s possible to use up your entire budget on fixtures, if you’re not careful.

Research the possibilities, and you’ll be able to determine the material cost to build a bathroom.

If you haven’t made a trip to a plumbing, flooring, or cabinet retailer, go ahead and do it now.

Tap on floor samples, eyeball tub sizes, and test out faucets for comfortable use.

It will also help you avoid sticker shock when you’re actually selecting your bathroom pieces.

1. Flooring

Current trends see bathrooms utilizing hard floor types that could range from wood-look flooring to ceramic tiles to finished concrete. Or, you may be happy with a quality vinyl flooring.

You’ll need to be able to calculate the square footage, and apply the costs per square foot of the materials that you are considering.

You may be surprised – if your bathroom addition will have a relatively small footprint, you may be able to upgrade your flooring for less than you expected.

Either way, go into it with some firm expectations. If you want to avoid vinyl flooring, go ahead and exclude it at the outset.

This way, you’ll be able to build your budget from the ground up, so to speak.

2. Cabinets

If you are planning on adding a substantial amount of counter space and storage to your bathroom addition, this is another area that can fluctuate hugely in costs.

Again, there are more basic materials, such as melamine, and the price range will go up accordingly with the type of cabinet.

Take a trip to your nearest big-box home store, and you’ll quickly get a feel for the range of materials and where they fall on the pricing scale.

Stores will tend to arrange their displays from low to high priced.

3. Fixtures

If your biggest must-have is a stand-alone tub, then start here first with your selections.

You can choose anything from :

  • — A traditional claw-footed soaking tub
  • — To sunken models that accommodate more than one person
  • — Which can rival a hot tub for therapeutic soaking power

You’ll also want to determine if you want to select all your fixtures from the same manufacturer.

It’s not as critical to match basic white sinks and toilets, but if you’re planning for anything more unique, you may want to spend some time pricing the package of matching items.

Contact Us to Learn About Our Bathroom Remodeling | Skyline Construction and Remodeling

Other Factors to Determine the Cost

Adding on a bathroom will also require adding on additional ventilation outlets, plumbing, HVAC outlets,  and electrical lines.

Plumbing can also include connecting to the existing sewer lines.

Because of the type of use, the electrical requirements are upgraded and specialized.

How to Determine Infrastructure Needs

Even if you will be completing the bathroom addition in stages, the basic infrastructure requires much more detail and expense than a project such as a bedroom addition would entail.

It’s important to consult with professionals while you’re figuring out the details.

They’ll be able to advise on things that will be required to meet local building codes, and keep you and your family safe.

Don’t forget to factor in the costs of your own inconvenience while your bathroom addition is being built.

If your household is already pushed to the limits of endurance while you wait for the next shower to be available, and you have house guests arriving, you may need to plan for a few showers at your gym.


Once you’ve made some initial decisions, you can also work with some of the online calculators to get a range of the cost to build a bathroom.

The most practical way to get a clear picture is by meeting with a qualified contractor.

They’ll already have the tools and the know-how to help you determine everything from licensing costs to materials.

Choose your contractor carefully, and they can be your best defense against budget creep and other nightmares.

You deserve that long tub soak or uninterrupted shower!